{
 "instance": {
  "hrth20211231b_10k.htm": {
   "axisCustom": 0,
   "axisStandard": 31,
   "contextCount": 359,
   "dts": {
    "calculationLink": {
     "local": [
      "hrth-20211231_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "hrth-20211231_def.xml"
     ]
    },
    "inline": {
     "local": [
      "hrth20211231b_10k.htm"
     ]
    },
    "labelLink": {
     "local": [
      "hrth-20211231_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "hrth-20211231_pre.xml"
     ]
    },
    "schema": {
     "local": [
      "hrth-20211231.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd",
      "https://xbrl.fasb.org/srt/2021/elts/srt-roles-2021-01-31.xsd",
      "https://xbrl.fasb.org/srt/2021/elts/srt-types-2021-01-31.xsd",
      "https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd",
      "https://xbrl.fasb.org/us-gaap/2021/elts/us-roles-2021-01-31.xsd",
      "https://xbrl.fasb.org/us-gaap/2021/elts/us-types-2021-01-31.xsd",
      "https://xbrl.sec.gov/country/2021/country-2021.xsd",
      "https://xbrl.sec.gov/currency/2021/currency-2021.xsd",
      "https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd",
      "https://xbrl.sec.gov/exch/2021/exch-2021.xsd",
      "https://xbrl.sec.gov/naics/2021/naics-2021.xsd",
      "https://xbrl.sec.gov/sic/2021/sic-2021.xsd",
      "https://xbrl.sec.gov/stpr/2021/stpr-2021.xsd"
     ]
    }
   },
   "elementCount": 701,
   "entityCount": 1,
   "hidden": {
    "http://fasb.org/us-gaap/2021-01-31": 33,
    "http://www.hartehanks.com/20211231": 15,
    "http://xbrl.sec.gov/dei/2021q4": 6,
    "total": 54
   },
   "keyCustom": 55,
   "keyStandard": 411,
   "memberCustom": 37,
   "memberStandard": 57,
   "nsprefix": "hrth",
   "nsuri": "http://www.hartehanks.com/20211231",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "b",
       "p",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "000 - Document - Document And Entity Information",
     "role": "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information",
     "shortName": "Document And Entity Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "b",
       "p",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "009 - Disclosure - Note D - Leases",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
     "shortName": "Note D - Leases",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PreferredStockTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "010 - Disclosure - Note E - Convertible Preferred Stock",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
     "shortName": "Note E - Convertible Preferred Stock",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PreferredStockTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "011 - Disclosure - Note F - Long-term Debt",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
     "shortName": "Note F - Long-term Debt",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "012 - Disclosure - Note G - Stock-based Compensation",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
     "shortName": "Note G - Stock-based Compensation",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "013 - Disclosure - Note H - Employee Benefit Plans",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
     "shortName": "Note H - Employee Benefit Plans",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "014 - Disclosure - Note I - Income Taxes",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
     "shortName": "Note I - Income Taxes",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "015 - Disclosure - Note J - Earnings Per Share",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
     "shortName": "Note J - Earnings Per Share",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ComprehensiveIncomeNoteTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "016 - Disclosure - Note K - Comprehensive Income (Loss)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss",
     "shortName": "Note K - Comprehensive Income (Loss)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ComprehensiveIncomeNoteTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "017 - Disclosure - Note L - Litigation and Contingencies",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies",
     "shortName": "Note L - Litigation and Contingencies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "018 - Disclosure - Note M - Certain Relationships and Related Party Transactions",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-m-certain-relationships-and-related-party-transactions",
     "shortName": "Note M - Certain Relationships and Related Party Transactions",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "001 - Statement - Consolidated Balance Sheets",
     "role": "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
     "shortName": "Consolidated Balance Sheets",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "019 - Disclosure - Note N - Restructuring Activities",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
     "shortName": "Note N - Restructuring Activities",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "020 - Disclosure - Note O - Segment Reporting",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-",
     "shortName": "Note O - Segment Reporting",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "021 - Disclosure - Significant Accounting Policies (Policies)",
     "role": "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies",
     "shortName": "Significant Accounting Policies (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "hrth:ConcentrationRiskGeographicConcentrationsPolicyPolicyTextBlock",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "022 - Disclosure - Note A - Overview and Significant Accounting Policies (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables",
     "shortName": "Note A - Overview and Significant Accounting Policies (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "hrth:ConcentrationRiskGeographicConcentrationsPolicyPolicyTextBlock",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "023 - Disclosure - Note C - Revenue From Contracts With Customers (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-tables",
     "shortName": "Note C - Revenue From Contracts With Customers (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hrth:LesseeLeasesSupplementalBalanceSheetInformationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "024 - Disclosure - Note D - Leases (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables",
     "shortName": "Note D - Leases (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hrth:LesseeLeasesSupplementalBalanceSheetInformationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "025 - Disclosure - Note F - Long-term Debt (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-tables",
     "shortName": "Note F - Long-term Debt (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "026 - Disclosure - Note G - Stock-based Compensation (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables",
     "shortName": "Note G - Stock-based Compensation (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfNetFundedStatusTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "027 - Disclosure - Note H - Employee Benefit Plans (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables",
     "shortName": "Note H - Employee Benefit Plans (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfNetFundedStatusTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "028 - Disclosure - Note I - Income Taxes (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables",
     "shortName": "Note I - Income Taxes (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": null,
     "groupType": "statement",
     "isDefault": "false",
     "longName": "002 - Statement - Consolidated Balance Sheets (Parentheticals)",
     "role": "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
     "shortName": "Consolidated Balance Sheets (Parentheticals)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": null
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "029 - Disclosure - Note J - Earnings Per Share (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-tables",
     "shortName": "Note J - Earnings Per Share (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "030 - Disclosure - Note K - Comprehensive Income (Loss) (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-tables",
     "shortName": "Note K - Comprehensive Income (Loss) (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfRestructuringAndRelatedCostsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "031 - Disclosure - Note N - Restructuring Activities (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-tables",
     "shortName": "Note N - Restructuring Activities (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfRestructuringAndRelatedCostsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "032 - Disclosure - Note O - Segment Reporting (Tables)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-tables",
     "shortName": "Note O - Segment Reporting (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:ImpairmentOfLongLivedAssetsHeldForUse",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "033 - Disclosure - Note A - Overview and Significant Accounting Policies (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
     "shortName": "Note A - Overview and Significant Accounting Policies (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:ImpairmentOfLongLivedAssetsHeldForUse",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "034 - Disclosure - Note A - Overview and Significant Accounting Policies - Operations in Different Geographic (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details",
     "shortName": "Note A - Overview and Significant Accounting Policies - Operations in Different Geographic (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock",
       "hrth:ConcentrationRiskGeographicConcentrationsPolicyPolicyTextBlock",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_StatementGeographicalAxis-US",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock",
       "us-gaap:ReceivablesTradeAndOtherAccountsReceivableAllowanceForDoubtfulAccountsPolicy",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AllowanceForDoubtfulAccountsReceivable",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "035 - Disclosure - Note A - Overview and Significant Accounting Policies - Allowance for Doubtful Accounts (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details",
     "shortName": "Note A - Overview and Significant Accounting Policies - Allowance for Doubtful Accounts (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock",
       "us-gaap:ReceivablesTradeAndOtherAccountsReceivableAllowanceForDoubtfulAccountsPolicy",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:AllowanceForDoubtfulAccountsReceivable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:PropertyPlantAndEquipmentTextBlock",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_PropertyPlantAndEquipmentByTypeAxis-BuildingAndBuildingImprovementsMember_RangeAxis-MinimumMember",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentUsefulLife",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "036 - Disclosure - Note A - Overview and Significant Accounting Policies - Property, Plant and Equipment (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
     "shortName": "Note A - Overview and Significant Accounting Policies - Property, Plant and Equipment (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:PropertyPlantAndEquipmentTextBlock",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_PropertyPlantAndEquipmentByTypeAxis-BuildingAndBuildingImprovementsMember_RangeAxis-MinimumMember",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentUsefulLife",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueRemainingPerformanceObligation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "037 - Disclosure - Note C - Revenue From Contracts With Customers (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual",
     "shortName": "Note C - Revenue From Contracts With Customers (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueRemainingPerformanceObligation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "038 - Disclosure - Note C - Revenue From Contracts With Customers - Disaggregation of Revenue (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
     "shortName": "Note C - Revenue From Contracts With Customers - Disaggregation of Revenue (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:DisaggregationOfRevenueTableTextBlock",
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_StatementBusinessSegmentsAxis-MarketingServicesMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "003 - Statement - Consolidated Statements of Comprehensive Income (Loss)",
     "role": "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
     "shortName": "Consolidated Statements of Comprehensive Income (Loss)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:LaborAndRelatedExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ContractWithCustomerAssetNetCurrent",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "039 - Disclosure - Note C - Revenue From Contracts With Customers - Contract Balances (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-contract-balances-details",
     "shortName": "Note C - Revenue From Contracts With Customers - Contract Balances (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock",
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:ContractWithCustomerLiabilityNoncurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinanceLeaseRightOfUseAsset",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "040 - Disclosure - Note D - Leases (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
     "shortName": "Note D - Leases (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-5",
      "lang": null,
      "name": "hrth:FinanceLeaseRightofUseAssetAccumulatedDepreciation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseRightOfUseAsset",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "041 - Disclosure - Note D - Leases - Supplemental Balance Sheet Information (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details",
     "shortName": "Note D - Leases - Supplemental Balance Sheet Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:LesseeLeasesSupplementalBalanceSheetInformationTableTextBlock",
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_BalanceSheetLocationAxis-RightOfUseAssetsMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:OperatingLeaseRightOfUseAsset",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:LeaseCostTableTextBlock",
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "042 - Disclosure - Note D - Leases - Components of Lease Expense (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details",
     "shortName": "Note D - Leases - Components of Lease Expense (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:LeaseCostTableTextBlock",
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:LeaseLiabilityMaturityTableTextBlock",
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-4",
      "first": true,
      "lang": null,
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "043 - Disclosure - Note D - Leases - Maturities of Finance and Operating Lease Liabilities (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
     "shortName": "Note D - Leases - Maturities of Finance and Operating Lease Liabilities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:LeaseLiabilityMaturityTableTextBlock",
       "hrth:LesseeOperatingAndFinanceLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-4",
      "first": true,
      "lang": null,
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-09-30_StatementClassOfStockAxis-SeriesAPreferredStockMember",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "us-gaap:PreferredStockDividendRatePercentage",
      "reportCount": 1,
      "unitRef": "Pure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "044 - Disclosure - Note E - Convertible Preferred Stock (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
     "shortName": "Note E - Convertible Preferred Stock (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:PreferredStockTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_StatementClassOfStockAxis-SeriesAPreferredStockMember",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:TemporaryEquityLiquidationPreference",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LettersOfCreditOutstandingAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "045 - Disclosure - Note F - Long-term Debt (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
     "shortName": "Note F - Long-term Debt (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LettersOfCreditOutstandingAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-6",
      "first": true,
      "lang": null,
      "name": "us-gaap:LongTermDebt",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "046 - Disclosure - Note F - Long-term Debt - Long-term Debt (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details",
     "shortName": "Note F - Long-term Debt - Long-term Debt (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-6",
      "first": true,
      "lang": null,
      "name": "us-gaap:LongTermDebt",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:AllocatedShareBasedCompensationExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "047 - Disclosure - Note G - Stock-based Compensation (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
     "shortName": "Note G - Stock-based Compensation (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:AllocatedShareBasedCompensationExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
      "reportCount": 1,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "048 - Disclosure - Note G - Stock-based Compensation - Summarizes All Stock Option Activity (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details",
     "shortName": "Note G - Stock-based Compensation - Summarizes All Stock Option Activity (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USDPerShare",
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31_StatementEquityComponentsAxis-PreferredStockMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "004 - Statement - Consolidated Statements of Changes in Stockholders' Deficit",
     "role": "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
     "shortName": "Consolidated Statements of Changes in Stockholders' Deficit",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31_StatementEquityComponentsAxis-PreferredStockMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "049 - Disclosure - Note G - Stock-based Compensation - Summarizes Information About Stock Option (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details",
     "shortName": "Note G - Stock-based Compensation - Summarizes Information About Stock Option (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfShareBasedCompensationStockAppreciationRightsAwardActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31_AwardTypeAxis-StockAppreciationRightsSARSMember",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "050 - Disclosure - Note G - Stock-based Compensation - Cash Stock Appreciations Rights (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
     "shortName": "Note G - Stock-based Compensation - Cash Stock Appreciations Rights (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfShareBasedCompensationStockAppreciationRightsAwardActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31_AwardTypeAxis-StockAppreciationRightsSARSMember",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:ScheduleOfSharebasedCompensationPhantomSharesOutstandingActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2020-01-01_2020-12-31",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod",
      "reportCount": 1,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "051 - Disclosure - Note G - Stock-based Compensation - Restricted Stock Units' Activity (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details",
     "shortName": "Note G - Stock-based Compensation - Restricted Stock Units' Activity (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31_AwardTypeAxis-RestrictedStockUnitsRSUMember",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     }
    },
    "R53": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:ScheduleOfSharebasedCompensationPhantomSharesOutstandingActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2020-01-01_2020-12-31",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod",
      "reportCount": 1,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "052 - Disclosure - Note G - Stock-based Compensation - Phantom Stock Unit (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
     "shortName": "Note G - Stock-based Compensation - Phantom Stock Unit (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:ScheduleOfSharebasedCompensationPhantomSharesOutstandingActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31_AwardTypeAxis-PhantomShareUnitsPSUsMember",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     }
    },
    "R54": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:ScheduleOfSharebasedCompensationPhantomSharesOutstandingActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2020-01-01_2020-12-31",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod",
      "reportCount": 1,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "053 - Disclosure - Note G - Stock-based Compensation - Performance Stock Units Activity (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
     "shortName": "Note G - Stock-based Compensation - Performance Stock Units Activity (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31_AwardTypeAxis-PerformanceSharesMember",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     }
    },
    "R55": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfExpectedBenefitPaymentsTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "054 - Disclosure - Note H - Employee Benefit Plans (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
     "shortName": "Note H - Employee Benefit Plans (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_RangeAxis-MinimumMember",
      "decimals": null,
      "lang": "en-US",
      "name": "hrth:DefinedBenefitPlanPeriodToMeetGoals",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R56": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:DefinedBenefitPlanPlanAssetsCategoryTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanFairValueOfPlanAssets",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "055 - Disclosure - Note H - Employee Benefit Plans - Defined Benefit Plans (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
     "shortName": "Note H - Employee Benefit Plans - Defined Benefit Plans (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfNetFundedStatusTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31_RetirementPlanTypeAxis-PensionPlansDefinedBenefitMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanBenefitObligation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R57": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_RetirementPlanTaxStatusAxis-QualifiedPlanMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "056 - Disclosure - Note H - Employee Benefit Plans - Recognized in Balance Sheet (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details",
     "shortName": "Note H - Employee Benefit Plans - Recognized in Balance Sheet (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_RetirementPlanTypeAxis-PensionPlansDefinedBenefitMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R58": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_RetirementPlanTypeAxis-PensionPlansDefinedBenefitMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "057 - Disclosure - Note H - Employee Benefit Plans - Recognized in Accumulated Other Comprehensive Loss (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
     "shortName": "Note H - Employee Benefit Plans - Recognized in Accumulated Other Comprehensive Loss (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_RetirementPlanTypeAxis-PensionPlansDefinedBenefitMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R59": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_RetirementPlanTypeAxis-PensionPlansDefinedBenefitMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "058 - Disclosure - Note H - Employee Benefit Plans - Accumulated Benefit of Obligation in Excess of Plan Asset (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
     "shortName": "Note H - Employee Benefit Plans - Accumulated Benefit of Obligation in Excess of Plan Asset (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_RetirementPlanTypeAxis-PensionPlansDefinedBenefitMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:NetIncomeLoss",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "005 - Statement - Consolidated Statements of Cash Flows",
     "role": "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-",
     "shortName": "Consolidated Statements of Cash Flows",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DepreciationDepletionAndAmortization",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R60": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfNetFundedStatusTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_RetirementPlanTypeAxis-PensionPlansDefinedBenefitMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanInterestCost",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "059 - Disclosure - Note H - Employee Benefit Plans - Net Period of Net Periodic Cost (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
     "shortName": "Note H - Employee Benefit Plans - Net Period of Net Periodic Cost (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDefinedBenefitPlansDisclosuresTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_RetirementPlanTypeAxis-PensionPlansDefinedBenefitMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R61": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAssumptionsUsedTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_RetirementPlanTypeAxis-QualifiedPlanIMember",
      "decimals": "4",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "060 - Disclosure - Note H - Employee Benefit Plans - Weighted-average Assumptions Used for Measurement of Defined Pension Plans (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details",
     "shortName": "Note H - Employee Benefit Plans - Weighted-average Assumptions Used for Measurement of Defined Pension Plans (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAssumptionsUsedTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_RetirementPlanTypeAxis-QualifiedPlanIMember",
      "decimals": "4",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     }
    },
    "R62": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:DefinedBenefitPlanPlanAssetsCategoryTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanFairValueOfPlanAssets",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "061 - Disclosure - Note H - Employee Benefit Plans - Plan Assets (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details",
     "shortName": "Note H - Employee Benefit Plans - Plan Assets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:DefinedBenefitPlanPlanAssetsCategoryTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "0",
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     }
    },
    "R63": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAllocationOfPlanAssetsTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_DefinedBenefitPlanByPlanAssetCategoriesAxis-DefinedBenefitPlanEquitySecuritiesMember_RetirementPlanNameAxis-QualifiedPlanIMember_RetirementPlanTypeAxis-OtherPensionPlansDefinedBenefitMember",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "062 - Disclosure - Note H - Employee Benefit Plans - Acceptable Level of Volatility (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
     "shortName": "Note H - Employee Benefit Plans - Acceptable Level of Volatility (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAllocationOfPlanAssetsTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31_DefinedBenefitPlanByPlanAssetCategoriesAxis-DefinedBenefitPlanEquitySecuritiesMember_RetirementPlanNameAxis-QualifiedPlanIMember_RetirementPlanTypeAxis-OtherPensionPlansDefinedBenefitMember",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     }
    },
    "R64": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfExpectedBenefitPaymentsTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "063 - Disclosure - Note H - Employee Benefit Plans - Expected Future Benefit Payments (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details",
     "shortName": "Note H - Employee Benefit Plans - Expected Future Benefit Payments (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfExpectedBenefitPaymentsTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R65": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "hrth:ExpectedProceedsFromIncomeTaxRefundsCarrybackOfLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "064 - Disclosure - Note I - Income Taxes (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual",
     "shortName": "Note I - Income Taxes (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "hrth:ExpectedProceedsFromIncomeTaxRefundsCarrybackOfLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R66": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CurrentFederalTaxExpenseBenefit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "065 - Disclosure - Note I - Income Taxes - Component of Income Tax (Benefit) (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details",
     "shortName": "Note I - Income Taxes - Component of Income Tax (Benefit) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CurrentFederalTaxExpenseBenefit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R67": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "066 - Disclosure - Note I - Income Taxes - Component of Loss Before Income Taxes (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-loss-before-income-taxes-details",
     "shortName": "Note I - Income Taxes - Component of Loss Before Income Taxes (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R68": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "067 - Disclosure - Note I - Income Taxes - Differences Between Total Income Tax (Benefit) Expense (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details",
     "shortName": "Note I - Income Taxes - Differences Between Total Income Tax (Benefit) Expense (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R69": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeTaxExpenseBenefit",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "068 - Disclosure - Note I - Income Taxes - Income Tax (Benefit) (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details",
     "shortName": "Note I - Income Taxes - Income Tax (Benefit) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "hrth:ScheduleOfAllocationOfIncomeTaxExpenseBenefitTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:IncomeTaxEffectsAllocatedDirectlyToEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "006 - Disclosure - Note A - Overview and Significant Accounting Policies",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
     "shortName": "Note A - Overview and Significant Accounting Policies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R70": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "hrth:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensationAndPostretirementBenefits",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "069 - Disclosure - Note I - Income Taxes - Significant Portions of the Deferred Tax Assets and Deferred Tax Liabilities (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details",
     "shortName": "Note I - Income Taxes - Significant Portions of the Deferred Tax Assets and Deferred Tax Liabilities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "hrth:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensationAndPostretirementBenefits",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R71": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DeferredTaxAssetsValuationAllowance",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "070 - Disclosure - Note I - Income Taxes - Reconciliation of Deferred Tax Valuation Allowance (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details",
     "shortName": "Note I - Income Taxes - Reconciliation of Deferred Tax Valuation Allowance (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:SummaryOfValuationAllowanceTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-4",
      "lang": null,
      "name": "hrth:ValuationAllowanceDeferredTaxAssetDeferredIncomeTaxExpenseBenefit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R72": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis-EmployeeStockOptionMember",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "071 - Disclosure - Note J - Earnings Per Share (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual",
     "shortName": "Note J - Earnings Per Share (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis-EmployeeStockOptionMember",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     }
    },
    "R73": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:NetIncomeLoss",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "072 - Disclosure - Note J - Earnings Per Share - Reconciliations of Basic and Diluted EPS (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details",
     "shortName": "Note J - Earnings Per Share - Reconciliations of Basic and Diluted EPS (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DilutiveSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R74": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "073 - Disclosure - Note K - Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Loss by Component (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details",
     "shortName": "Note K - Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Loss by Component (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2019-12-31_StatementEquityComponentsAxis-AccumulatedDefinedBenefitPlansAdjustmentMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R75": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LitigationReserve",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "074 - Disclosure - Note L - Litigation and Contingencies (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies-details-textual",
     "shortName": "Note L - Litigation and Contingencies (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LitigationReserve",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R76": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RestructuringCharges",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "075 - Disclosure - Note N - Restructuring Activities (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
     "shortName": "Note N - Restructuring Activities (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2021-12-31",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:RestructuringAndRelatedCostExpectedCost1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R77": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RestructuringCharges",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "076 - Disclosure - Note N - Restructuring Activities - Restructuring Expense (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details",
     "shortName": "Note N - Restructuring Activities - Restructuring Expense (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfRestructuringAndRelatedCostsTextBlock",
       "us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31_RestructuringCostAndReserveAxis-FacilityAssetImpairmentAndOtherExpenseMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:RestructuringCharges",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R78": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfRestructuringReserveByTypeOfCostTextBlock",
       "us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RestructuringReserve",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "077 - Disclosure - Note N - Restructuring Activities - Changes in Liabilities (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
     "shortName": "Note N - Restructuring Activities - Changes in Liabilities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfRestructuringReserveByTypeOfCostTextBlock",
       "us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "i_2020-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RestructuringReserve",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R79": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:NumberOfOperatingSegments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "078 - Disclosure - Note O - Segment Reporting (Details Textual)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-details-textual",
     "shortName": "Note O - Segment Reporting (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:NumberOfOperatingSegments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "007 - Disclosure - Note B - Recent Accounting Pronouncements",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-b-recent-accounting-pronouncements",
     "shortName": "Note B - Recent Accounting Pronouncements",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R80": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:Revenues",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "079 - Disclosure - Note O - Segment Reporting - Financial Information by Segment (Details)",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details",
     "shortName": "Note O - Segment Reporting - Financial Information by Segment (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:Revenues",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RevenueFromContractWithCustomerTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "008 - Disclosure - Note C - Revenue From Contracts With Customers",
     "role": "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers",
     "shortName": "Note C - Revenue From Contracts With Customers",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hrth20211231b_10k.htm",
      "contextRef": "d_2021-01-01_2021-12-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RevenueFromContractWithCustomerTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 100,
   "tag": {
    "country_US": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "UNITED STATES"
       }
      }
     },
     "localname": "US",
     "nsuri": "http://xbrl.sec.gov/country/2021",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_AuditorFirmId": {
     "auth_ref": [
      "r735",
      "r736",
      "r737"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "PCAOB issued Audit Firm Identifier",
        "label": "Auditor Firm ID"
       }
      }
     },
     "localname": "AuditorFirmId",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "nonemptySequenceNumberItemType"
    },
    "dei_AuditorLocation": {
     "auth_ref": [
      "r735",
      "r736",
      "r737"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Auditor Location"
       }
      }
     },
     "localname": "AuditorLocation",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "internationalNameItemType"
    },
    "dei_AuditorName": {
     "auth_ref": [
      "r735",
      "r736",
      "r737"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Auditor Name"
       }
      }
     },
     "localname": "AuditorName",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "internationalNameItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CurrentFiscalYearEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "End date of current fiscal year in the format --MM-DD.",
        "label": "Current Fiscal Year End Date"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "dei_DocumentAnnualReport": {
     "auth_ref": [
      "r735",
      "r736",
      "r737"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an annual report.",
        "label": "Document Annual Report"
       }
      }
     },
     "localname": "DocumentAnnualReport",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentFiscalPeriodFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fiscal period values are FY, Q1, Q2, and Q3.  1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.",
        "label": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.",
        "label": "Document Fiscal Year Focus"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentInformationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Document Information [Line Items]"
       }
      }
     },
     "localname": "DocumentInformationLineItems",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_DocumentInformationTable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Container to support the formal attachment of each official or unofficial, public or private document as part of a submission package.",
        "label": "Document Information [Table]"
       }
      }
     },
     "localname": "DocumentInformationTable",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "xbrltype": "stringItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r738"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r733"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityCommonStockSharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.",
        "label": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "sharesItemType"
    },
    "dei_EntityCurrentReportingStatus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Current Reporting Status"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains.",
        "label": "Entity [Domain]"
       }
      }
     },
     "localname": "EntityDomain",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-b-recent-accounting-pronouncements",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-contract-balances-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-loss-before-income-taxes-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-m-certain-relationships-and-related-party-transactions",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-tables",
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r733"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r733"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Filer Category"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "filerCategoryItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r740"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).",
        "label": "Entity Interactive Data Current"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityPublicFloat": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.",
        "label": "Entity Public Float"
       }
      }
     },
     "localname": "EntityPublicFloat",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "monetaryItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r733"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r733"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.",
        "label": "Entity Shell Company"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r733"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r733"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_EntityVoluntaryFilers": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.",
        "label": "Entity Voluntary Filers"
       }
      }
     },
     "localname": "EntityVoluntaryFilers",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityWellKnownSeasonedIssuer": {
     "auth_ref": [
      "r741"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.",
        "label": "Entity Well-known Seasoned Issuer"
       }
      }
     },
     "localname": "EntityWellKnownSeasonedIssuer",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_LegalEntityAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The set of legal entities associated with a report.",
        "label": "Legal Entity [Axis]"
       }
      }
     },
     "localname": "LegalEntityAxis",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-b-recent-accounting-pronouncements",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-contract-balances-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-loss-before-income-taxes-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-m-certain-relationships-and-related-party-transactions",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-tables",
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r732"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Title of 12(b) Security"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r734"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-document-and-entity-information"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "hrth_AdjustmentToContractTerminationFeeMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Restructuring costs related to the adjustment to contract termination fees.",
        "label": "Adjustment to Contract Termination Fee [Member]"
       }
      }
     },
     "localname": "AdjustmentToContractTerminationFeeMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_BloombergShorttermBankYieldIndexRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the Bloomberg Short-Term Bank Yield Index Rate.",
        "label": "Bloomberg Short-Term Bank Yield Index Rate [Member]"
       }
      }
     },
     "localname": "BloombergShorttermBankYieldIndexRateMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_CapitalLossesFromAssetDisposalMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Restructuring costs related to capital losses from asset disposal.",
        "label": "Capital Losses from Asset Disposal [Member]"
       }
      }
     },
     "localname": "CapitalLossesFromAssetDisposalMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_CashEquivalentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents cash equivalent.",
        "label": "Cash Equivalent [Member]"
       }
      }
     },
     "localname": "CashEquivalentMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_CashPerformanceSharesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents cash performance shares.",
        "label": "Cash Performance Shares [Member]"
       }
      }
     },
     "localname": "CashPerformanceSharesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_ConcentrationRiskGeographicConcentrationsPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for geographic concentrations risk.",
        "label": "Concentration Risk, Geographic Concentrations, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "ConcentrationRiskGeographicConcentrationsPolicyPolicyTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_ContributionMargin": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details": {
       "order": 2.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to contribution margin.",
        "label": "hrth_ContributionMargin",
        "totalLabel": "Contribution margin"
       }
      }
     },
     "localname": "ContributionMargin",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_ConvertiblePreferredStockSharesIssuedUponConversionAsPercentOfCommonStockOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents shares issued upon conversion as percentage of common stock outstanding for convertible preferred stock.",
        "label": "hrth_ConvertiblePreferredStockSharesIssuedUponConversionAsPercentOfCommonStockOutstanding",
        "terseLabel": "Convertible Preferred Stock, Shares Issued upon Conversion as Percent of Common Stock Outstanding"
       }
      }
     },
     "localname": "ConvertiblePreferredStockSharesIssuedUponConversionAsPercentOfCommonStockOutstanding",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "hrth_CustomerCareMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to customer care.",
        "label": "Customer Care [Member]"
       }
      }
     },
     "localname": "CustomerCareMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_CustomerPostageAndProgramDepositsCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 6.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents customer postage and program deposits current.",
        "label": "Customer postage and program deposits"
       }
      }
     },
     "localname": "CustomerPostageAndProgramDepositsCurrent",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_DebtInstrumentTermExtensionPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The extension period for the term of the debt instrument.",
        "label": "hrth_DebtInstrumentTermExtensionPeriod",
        "terseLabel": "Debt Instrument, Term, Extension Period (Year)"
       }
      }
     },
     "localname": "DebtInstrumentTermExtensionPeriod",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "hrth_DeductibleForIndividualHealthCareClaims": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the amount deductible during the period for individual healthcare claims.",
        "label": "hrth_DeductibleForIndividualHealthCareClaims",
        "terseLabel": "Deductible For Individual Health Care Claims"
       }
      }
     },
     "localname": "DeductibleForIndividualHealthCareClaims",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_DeferredTaxAssetsLeasesLiability": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 4.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from leases liability.",
        "label": "Lease liability"
       }
      }
     },
     "localname": "DeferredTaxAssetsLeasesLiability",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensationAndPostretirementBenefits": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 6.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation and retirement plans.",
        "label": "Deferred compensation and retirement plan"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensationAndPostretirementBenefits",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_DeferredTaxLiabilitiesRightOfUseAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 2.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax consequences attributable to taxable temporary differences derived from right of use assets.",
        "label": "hrth_DeferredTaxLiabilitiesRightOfUseAssets",
        "negatedLabel": "Right-of-use asset"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesRightOfUseAssets",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_DefinedBenefitPlanAmortizationPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents amortization period of defined benefit.",
        "label": "hrth_DefinedBenefitPlanAmortizationPeriod",
        "terseLabel": "Defined Benefit Plan, Amortization Period (Year)"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmortizationPeriod",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "hrth_DefinedBenefitPlanEquitySecuritiesEmergingMarketsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents emerging markets of equity securities for defined benefit plan",
        "label": "Defined Benefit Plan, Equity Securities, Emerging Markets [Member]"
       }
      }
     },
     "localname": "DefinedBenefitPlanEquitySecuritiesEmergingMarketsMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_DefinedBenefitPlanExpectedFutureBenefitPayments": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the amount of benefits expected to be paid in following the latest fiscal year from a defined benefit plan.",
        "label": "hrth_DefinedBenefitPlanExpectedFutureBenefitPayments",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPayments",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_DefinedBenefitPlanPeriodOfOperatingHistoryAndSufficientTradingVolumeOfInvestedEntity": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents history and sufficient trading volume of interest entity for period of operating of defined benefit plan.",
        "label": "hrth_DefinedBenefitPlanPeriodOfOperatingHistoryAndSufficientTradingVolumeOfInvestedEntity",
        "terseLabel": "Defined Benefit Plan, Period Of Operating, History and Sufficient Trading Volume of Invested Entity (Year)"
       }
      }
     },
     "localname": "DefinedBenefitPlanPeriodOfOperatingHistoryAndSufficientTradingVolumeOfInvestedEntity",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "hrth_DefinedBenefitPlanPeriodToMeetGoals": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the defined benefit plan period required to meet investment policy's goal.",
        "label": "hrth_DefinedBenefitPlanPeriodToMeetGoals",
        "terseLabel": "Defined Benefit Plan, Period to Meet Goals (Year)"
       }
      }
     },
     "localname": "DefinedBenefitPlanPeriodToMeetGoals",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "hrth_EBITDA": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents earning before interest, taxes, depreciation, and amortization.",
        "label": "EBITDA"
       }
      }
     },
     "localname": "EBITDA",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_EffectiveIncomeTaxRateReconciliationAdjustmentsToStateAttributes": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 10.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state attributes adjustments.",
        "label": "Adjustments to State Attributes"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationAdjustmentsToStateAttributes",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_EffectiveIncomeTaxRateReconciliationCARESActNetOperatingLossCarryforwardsCarrybackAmount": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 7.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to CARES Act net operating loss carryforwards carryback.",
        "label": "CARES Act NOL Carryback"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationCARESActNetOperatingLossCarryforwardsCarrybackAmount",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_EffectiveIncomeTaxRateReconciliationForeignSubsidiaryDividendInclusions": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 2.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying foreign subsidiary dividend inclusions.",
        "label": "Foreign subsidiary dividend inclusions"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationForeignSubsidiaryDividendInclusions",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_EffectiveIncomeTaxRateReconciliationReturnToProvisionAmount": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 5.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying return to provision.",
        "label": "Return to Provision"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationReturnToProvisionAmount",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_EmergingMarketsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to emerging markets.",
        "label": "Emerging Markets [Member]"
       }
      }
     },
     "localname": "EmergingMarketsMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_EquityIncentivePlan2020Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to equity incentive plan 2020.",
        "label": "Equity Incentive Plan 2020 [Member]"
       }
      }
     },
     "localname": "EquityIncentivePlan2020Member",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_ExpectedProceedsFromIncomeTaxRefundsCarrybackOfLoss": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents expected proceeds from income tax refunds from carryback of the loss.",
        "label": "hrth_ExpectedProceedsFromIncomeTaxRefundsCarrybackOfLoss",
        "terseLabel": "Expected Proceeds from Income Tax Refunds, Carryback of Loss"
       }
      }
     },
     "localname": "ExpectedProceedsFromIncomeTaxRefundsCarrybackOfLoss",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_FacilityAssetImpairmentAndOtherExpenseMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents facility, asset impairment and other expense.",
        "label": "Facility, Asset Impairment and Other Expense [Member]"
       }
      }
     },
     "localname": "FacilityAssetImpairmentAndOtherExpenseMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_FacilityInKansasCityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents facility in Kansas city.",
        "label": "Facility in Kansas City [Member]"
       }
      }
     },
     "localname": "FacilityInKansasCityMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_FinanceLeaseCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details": {
       "order": 2.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of total cost for finance lease.",
        "label": "hrth_FinanceLeaseCost",
        "totalLabel": "Total Finance lease cost"
       }
      }
     },
     "localname": "FinanceLeaseCost",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_FinanceLeasePaymentsIncludingShorttermLeases": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow for payment on finance lease including short-term leases.",
        "label": "hrth_FinanceLeasePaymentsIncludingShorttermLeases",
        "negatedLabel": "Payment of finance leases"
       }
      }
     },
     "localname": "FinanceLeasePaymentsIncludingShorttermLeases",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_FinanceLeaseRightofUseAssetAccumulatedDepreciation": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of accumulated depreciation for right-of-use asset under finance lease.",
        "label": "hrth_FinanceLeaseRightofUseAssetAccumulatedDepreciation",
        "terseLabel": "Finance Lease, Right-of-Use Asset, Accumulated Depreciation"
       }
      }
     },
     "localname": "FinanceLeaseRightofUseAssetAccumulatedDepreciation",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_FirstFourAnniversariesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents first four anniversaries.",
        "label": "First Four Anniversaries [Member]"
       }
      }
     },
     "localname": "FirstFourAnniversariesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_FulfillmentAndLogisticsServicesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information regarding the Fulfilment and Logistics Services segment.",
        "label": "Fulfillment and Logistics Services [Member]"
       }
      }
     },
     "localname": "FulfillmentAndLogisticsServicesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_IncomeTaxRateReconciliationGainLossOnPPPLoanForgiveness": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 9.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to gain (loss) on PPP loan forgiveness.",
        "label": "hrth_IncomeTaxRateReconciliationGainLossOnPPPLoanForgiveness",
        "terseLabel": "Gain on PPP Loan Forgiveness"
       }
      }
     },
     "localname": "IncomeTaxRateReconciliationGainLossOnPPPLoanForgiveness",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_InducementAwardOptionsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents inducement option awards.",
        "label": "Inducement Award Options [Member]"
       }
      }
     },
     "localname": "InducementAwardOptionsMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_InvestmentAtNAVMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents investment at NAV.",
        "label": "Investment at NAV [Member]"
       }
      }
     },
     "localname": "InvestmentAtNAVMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_InvestmentGradeMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to investment grade.",
        "label": "Investment Grade [Member]"
       }
      }
     },
     "localname": "InvestmentGradeMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_InvestmentsExcludingInvestmentsAtNAVMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents investment excluding investments at NAV.",
        "label": "Investments Excluding Investments at NAV [Member]"
       }
      }
     },
     "localname": "InvestmentsExcludingInvestmentsAtNAVMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_LeaseImpairmentAndTerminationChargesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Restructuring costs related to lease impairment and termination charges.",
        "label": "Lease Impairment and Termination Charges [Member]"
       }
      }
     },
     "localname": "LeaseImpairmentAndTerminationChargesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_LeaseLiability": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating and finance leases.",
        "label": "hrth_LeaseLiability",
        "totalLabel": "Total Lease Liabilities, total"
       }
      }
     },
     "localname": "LeaseLiability",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_LeaseLiabilityCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 4.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": 1.0,
       "parentTag": "hrth_LeaseLiability",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating and finance leases, classified as current.",
        "label": "Short-term lease liabilities",
        "terseLabel": "Short-term lease liabilities, total"
       }
      }
     },
     "localname": "LeaseLiabilityCurrent",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_LeaseLiabilityMaturityTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of undiscounted cash flows of operating and finance lease liabilities.",
        "label": "Lease, Liability, Maturity [Table Text Block]"
       }
      }
     },
     "localname": "LeaseLiabilityMaturityTableTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_LeaseLiabilityNoncurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 0.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": 0.0,
       "parentTag": "hrth_LeaseLiability",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating and finance leases, classified as noncurrent.",
        "label": "Long-term lease liabilities",
        "terseLabel": "Long-term lease liabilities, total"
       }
      }
     },
     "localname": "LeaseLiabilityNoncurrent",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_LeaseRightofuseAsset": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 2.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's right to use underlying asset under operating and finance leases.",
        "label": "Right-of-use assets",
        "terseLabel": "Right-of-use Assets, total"
       }
      }
     },
     "localname": "LeaseRightofuseAsset",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_LesseeLeaseRemainingLeaseTerm": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The remaining lease term for leases of the lessee.",
        "label": "hrth_LesseeLeaseRemainingLeaseTerm",
        "terseLabel": "Lessee, Lease Remaining Lease Term (Year)"
       }
      }
     },
     "localname": "LesseeLeaseRemainingLeaseTerm",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "hrth_LesseeLeaseRenewalTerm": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The renewal term for leases of the lessee.",
        "label": "hrth_LesseeLeaseRenewalTerm",
        "terseLabel": "Lessee, Lease, Renewal Term (Year)"
       }
      }
     },
     "localname": "LesseeLeaseRenewalTerm",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "hrth_LesseeLeasesSupplementalBalanceSheetInformationTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The tabular disclosure for supplemental balance sheet information for operating and finance leases of the lessee.",
        "label": "Lessee, Leases, Supplemental Balance Sheet Information [Table Text Block]"
       }
      }
     },
     "localname": "LesseeLeasesSupplementalBalanceSheetInformationTableTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_LesseeOperatingAndFinanceLeasesTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for operating and finance leases of the lessee.",
        "label": "Lessee, Operating and Finance Leases [Text Block]"
       }
      }
     },
     "localname": "LesseeOperatingAndFinanceLeasesTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_LineOfCreditFacilityCollateralFeesPercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of the fees associated with providing collateral for the credit facility.",
        "label": "hrth_LineOfCreditFacilityCollateralFeesPercentage",
        "terseLabel": "Line of Credit Facility, Collateral Fees, Percentage"
       }
      }
     },
     "localname": "LineOfCreditFacilityCollateralFeesPercentage",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "hrth_LongtermLeaseLiabilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents long-term lease liabilities.",
        "label": "Long-term Lease Liabilities [Member]"
       }
      }
     },
     "localname": "LongtermLeaseLiabilitiesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_MarketingServicesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to marketing services.",
        "label": "Marketing Services [Member]"
       }
      }
     },
     "localname": "MarketingServicesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_NewCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the New Credit Facility.",
        "label": "New Credit Facility [Member]"
       }
      }
     },
     "localname": "NewCreditFacilityMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_NoteToFinancialStatementDetailsTextual": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note To Financial Statement Details Textual"
       }
      }
     },
     "localname": "NoteToFinancialStatementDetailsTextual",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_NotesToFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Notes To Financial Statements [Abstract]"
       }
      }
     },
     "localname": "NotesToFinancialStatementsAbstract",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_NumberOfMajorCustomers": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.",
        "label": "hrth_NumberOfMajorCustomers",
        "terseLabel": "Number of Major Customers"
       }
      }
     },
     "localname": "NumberOfMajorCustomers",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "integerItemType"
    },
    "hrth_OmnibusIncentivePlan2005Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents omnibus incentive plan 2005.",
        "label": "Omnibus Incentive Plan 2005 [Member]"
       }
      }
     },
     "localname": "OmnibusIncentivePlan2005Member",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_OmnibusIncentivePlan2013Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents omnibus plan 2013.",
        "label": "Omnibus Incentive Plan 2013 [Member]"
       }
      }
     },
     "localname": "OmnibusIncentivePlan2013Member",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_OneCustomerMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents one customer.",
        "label": "One Customer [Member]"
       }
      }
     },
     "localname": "OneCustomerMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_PaycheckProtectionProgramCaresActMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents loan designed to provide funds for small businesses to keep their employees on the payroll.",
        "label": "Paycheck Protection Program CARES Act [Member]"
       }
      }
     },
     "localname": "PaycheckProtectionProgramCaresActMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_PrepaidTaxesAndIncomeTaxesReceivableCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 2.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset related to consideration paid in advance for income and other taxes that provide economic benefits within a future period of one year or the normal operating cycle, if longer and carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.",
        "label": "Prepaid income tax and income tax receivable"
       }
      }
     },
     "localname": "PrepaidTaxesAndIncomeTaxesReceivableCurrent",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_PresentationOfOperatingExpenseInConsolidatedStatementsOfComprehensiveIncomePolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy used for presentation of operating expenses in consolidated statements of comprehensive income.",
        "label": "Presentation Of Operating Expense In Consolidated Statements of Comprehensive Income [Policy Text Block]"
       }
      }
     },
     "localname": "PresentationOfOperatingExpenseInConsolidatedStatementsOfComprehensiveIncomePolicyTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_ProceedsFromIncomeTaxRefundsCARESAct": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "he amount of cash received during the period as refunds for the overpayment of taxes for Cares Act.",
        "label": "hrth_ProceedsFromIncomeTaxRefundsCARESAct",
        "terseLabel": "Proceeds from Income Tax Refunds CARES Act"
       }
      }
     },
     "localname": "ProceedsFromIncomeTaxRefundsCARESAct",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_ProceedsFromPaymentsForIssuanceOfTreasuryStock": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow (cash outflow) from issuance of treasury stock.",
        "label": "Treasury stock activities"
       }
      }
     },
     "localname": "ProceedsFromPaymentsForIssuanceOfTreasuryStock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_QualifiedPlanIIMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to Qualified Plan II.",
        "label": "Qualified Plan II [Member]"
       }
      }
     },
     "localname": "QualifiedPlanIIMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_QualifiedPlanIMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to Qualified plan I.",
        "label": "Qualified Plan I [Member]"
       }
      }
     },
     "localname": "QualifiedPlanIMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_ReAllocationOfEarningsToParticipatingSecuritiesConsideringPotentiallyDilutiveSecurities": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details": {
       "order": 0.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from re-allocation of earnings to participating securities considering potentially dilutive securities.",
        "label": "hrth_ReAllocationOfEarningsToParticipatingSecuritiesConsideringPotentiallyDilutiveSecurities",
        "negatedLabel": "Less: Re-allocation of earnings to participating securities considering potentially dilutive securities"
       }
      }
     },
     "localname": "ReAllocationOfEarningsToParticipatingSecuritiesConsideringPotentiallyDilutiveSecurities",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_RelatedPartyTransactionsPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for related party transactions.",
        "label": "Related Party Transactions, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsPolicyPolicyTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_RestorationPensionPlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the restoration pension plan.",
        "label": "Restoration Pension Plan [Member]"
       }
      }
     },
     "localname": "RestorationPensionPlanMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_RestorationPlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to restoration plan.",
        "label": "Restoration Plan [Member]"
       }
      }
     },
     "localname": "RestorationPlanMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_RevenueAndCreditConcentrationPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for revenue and credit concentration.",
        "label": "Revenue and Credit Concentration, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "RevenueAndCreditConcentrationPolicyPolicyTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_RightOfUseAssetsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Primary financial statement caption encompassing right of use assets use assets",
        "label": "Right of Use Assets [Member]"
       }
      }
     },
     "localname": "RightOfUseAssetsMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_ScheduleOfAllocationOfIncomeTaxExpenseBenefitTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of allocation of income tax between results of operations and stockholders' equity.",
        "label": "Schedule of Allocation of Income Tax Expense (Benefit) [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAllocationOfIncomeTaxExpenseBenefitTableTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of changes in allowance for doubtful accounts.",
        "label": "Schedule of Allowance for Doubtful Accounts [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_ScheduleOfSharebasedCompensationPhantomSharesOutstandingActivityTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of phantom shares outstanding activity for schedule of share-based compensation.",
        "label": "Schedule of Share-based Compensation, Phantom Shares, Outstanding Activity [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfSharebasedCompensationPhantomSharesOutstandingActivityTableTextBlock",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hrth_ShareBasedCompensationArrangementBySharebasedPaymentAwardPerformanceMeasurementPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents performance measurement period for share-based compensation arrangement by share-based payment award.",
        "label": "hrth_ShareBasedCompensationArrangementBySharebasedPaymentAwardPerformanceMeasurementPeriod",
        "terseLabel": "Share- based Compensation Arrangement By Share-based Payment Award, Performance Measurement Period (Year)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementBySharebasedPaymentAwardPerformanceMeasurementPeriod",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentAndCorrectionWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average fair value at grant date for nonvested equity-based awards adjustment and correction on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).",
        "label": "Adjustment and Correction, weighted average grant date fair value (in dollars per share)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentAndCorrectionWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average fair value at grant date for nonvested equity-based awards exercised during the period on other than stock (or unit) option plans",
        "label": "Exercised, weighted average grant date fair value (in dollars per share)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were expiration during period.",
        "label": "Expired, weighted average grant date fair value (in dollars per share)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumberAdjustmentAndCorrection": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that adjustment and correction during the reporting period.",
        "label": "Adjustment and Correction (in shares)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumberAdjustmentAndCorrection",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPercentageOfAwardSharesToBeIssuedBasedOnPerformance": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents shares issued based on performance for percentage of award for share-based compensation arrangement by share-based payment award.",
        "label": "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPercentageOfAwardSharesToBeIssuedBasedOnPerformance",
        "terseLabel": "Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Percentage Of Award, Shares To Be Issued, Based On Performance"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPercentageOfAwardSharesToBeIssuedBasedOnPerformance",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAdjustmentAndCorrection": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of options for adjustments and correction for share-based compensation arrangement by share-based payment award.",
        "label": "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAdjustmentAndCorrection",
        "negatedLabel": "Adjustment and Correction (in shares)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAdjustmentAndCorrection",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "hrth_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAdjustmentAndCorrectionWeightedAverageExercisePriceEndingBalance": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average per share amount for adjustment and correction for option.",
        "label": "Adjustment and Correction, weighted average exercise price (in dollars per share)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAdjustmentAndCorrectionWeightedAverageExercisePriceEndingBalance",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "hrth_ShorttermLeaseLiabilitiesAndLongtermLeaseLiabilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents short-term lease liabilities and long-term lease liabilities.",
        "label": "Short-term Lease Liabilities and Long-term Lease Liabilities [Member]"
       }
      }
     },
     "localname": "ShorttermLeaseLiabilitiesAndLongtermLeaseLiabilitiesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_ShorttermLeaseLiabilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents short-term lease liabilities.",
        "label": "Short-term Lease Liabilities [Member]"
       }
      }
     },
     "localname": "ShorttermLeaseLiabilitiesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_TexasCapitalBankMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the lending institution.",
        "label": "Texas Capital Bank [Member]"
       }
      }
     },
     "localname": "TexasCapitalBankMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_TexasCapitalCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the Texas Capital Credit Facility.",
        "label": "Texas Capital Credit Facility [Member]"
       }
      }
     },
     "localname": "TexasCapitalCreditFacilityMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_TwentyFiveCustomersMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents 25 customers.",
        "label": "Twenty Five Customers [Member]"
       }
      }
     },
     "localname": "TwentyFiveCustomersMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_UnvestedSharesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents unvested shares.",
        "label": "Unvested Shares [Member]"
       }
      }
     },
     "localname": "UnvestedSharesMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_ValuationAllowanceDeferredTaxAssetDeferredIncomeTaxExpenseBenefit": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents valuation allowance of deferred tax assets for deferred income tax expense (benefit).",
        "label": "Deferred Income Tax Expense"
       }
      }
     },
     "localname": "ValuationAllowanceDeferredTaxAssetDeferredIncomeTaxExpenseBenefit",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_ValuationAllowanceDeferredTaxAssetOtherComprehensiveIncome": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents other comprehensive income for deferred tax asset valuation.",
        "label": "Other Comprehensive Income"
       }
      }
     },
     "localname": "ValuationAllowanceDeferredTaxAssetOtherComprehensiveIncome",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_ValuationAllowanceDeferredTaxAssetReturnToProvisionImpact": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of valuation allowance for deferred tax asset return to provision impact.",
        "label": "hrth_ValuationAllowanceDeferredTaxAssetReturnToProvisionImpact",
        "negatedLabel": "Return to Provision Impact"
       }
      }
     },
     "localname": "ValuationAllowanceDeferredTaxAssetReturnToProvisionImpact",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hrth_WiproMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to Wipro.",
        "label": "Wipro [Member]"
       }
      }
     },
     "localname": "WiproMember",
     "nsuri": "http://www.hartehanks.com/20211231",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "hrth_statement-statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note A - Overview and Significant Accounting Policies - Allowance for Doubtful Accounts (Details)"
       }
      }
     },
     "localname": "statement-statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note A - Overview and Significant Accounting Policies - Operations in Different Geographic (Details)"
       }
      }
     },
     "localname": "statement-statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note A - Overview and Significant Accounting Policies - Property, Plant and Equipment (Details)"
       }
      }
     },
     "localname": "statement-statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-a-overview-and-significant-accounting-policies-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note A - Overview and Significant Accounting Policies"
       }
      }
     },
     "localname": "statement-statement-note-a-overview-and-significant-accounting-policies-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-c-revenue-from-contracts-with-customers-contract-balances-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note C - Revenue From Contracts With Customers - Contract Balances (Details)"
       }
      }
     },
     "localname": "statement-statement-note-c-revenue-from-contracts-with-customers-contract-balances-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note C - Revenue From Contracts With Customers - Disaggregation of Revenue (Details)"
       }
      }
     },
     "localname": "statement-statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-c-revenue-from-contracts-with-customers-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note C - Revenue From Contracts With Customers"
       }
      }
     },
     "localname": "statement-statement-note-c-revenue-from-contracts-with-customers-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-d-leases-components-of-lease-expense-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note D - Leases - Components of Lease Expense (Details)"
       }
      }
     },
     "localname": "statement-statement-note-d-leases-components-of-lease-expense-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note D - Leases - Maturities of Finance and Operating Lease Liabilities (Details)"
       }
      }
     },
     "localname": "statement-statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-d-leases-supplemental-balance-sheet-information-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note D - Leases - Supplemental Balance Sheet Information (Details)"
       }
      }
     },
     "localname": "statement-statement-note-d-leases-supplemental-balance-sheet-information-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-d-leases-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note D - Leases"
       }
      }
     },
     "localname": "statement-statement-note-d-leases-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-f-longterm-debt-longterm-debt-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note F - Long-term Debt - Long-term Debt (Details)"
       }
      }
     },
     "localname": "statement-statement-note-f-longterm-debt-longterm-debt-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-f-longterm-debt-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note F - Long-term Debt"
       }
      }
     },
     "localname": "statement-statement-note-f-longterm-debt-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note G - Stock-based Compensation - Cash Stock Appreciations Rights (Details)"
       }
      }
     },
     "localname": "statement-statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-g-stockbased-compensation-performance-stock-units-activity-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note G - Stock-based Compensation - Performance Stock Units Activity (Details)"
       }
      }
     },
     "localname": "statement-statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-g-stockbased-compensation-phantom-stock-unit-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note G - Stock-based Compensation - Phantom Stock Unit (Details)"
       }
      }
     },
     "localname": "statement-statement-note-g-stockbased-compensation-phantom-stock-unit-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-g-stockbased-compensation-restricted-stock-units-activity-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note G - Stock-based Compensation - Restricted Stock Units' Activity (Details)"
       }
      }
     },
     "localname": "statement-statement-note-g-stockbased-compensation-restricted-stock-units-activity-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note G - Stock-based Compensation - Summarizes All Stock Option Activity (Details)"
       }
      }
     },
     "localname": "statement-statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note G - Stock-based Compensation - Summarizes Information About Stock Option (Details)"
       }
      }
     },
     "localname": "statement-statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-g-stockbased-compensation-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note G - Stock-based Compensation"
       }
      }
     },
     "localname": "statement-statement-note-g-stockbased-compensation-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Acceptable Level of Volatility (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Accumulated Benefit of Obligation in Excess of Plan Asset (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-defined-benefit-plans-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Defined Benefit Plans (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Expected Future Benefit Payments (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Net Period of Net Periodic Cost (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-plan-assets-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Plan Assets (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-plan-assets-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Recognized in Accumulated Other Comprehensive Loss (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Recognized in Balance Sheet (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note H - Employee Benefit Plans - Weighted-average Assumptions Used for Measurement of Defined Pension Plans (Details)"
       }
      }
     },
     "localname": "statement-statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note I - Income Taxes - Component of Income Tax (Benefit) (Details)"
       }
      }
     },
     "localname": "statement-statement-note-i-income-taxes-component-of-income-tax-benefit-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-i-income-taxes-component-of-loss-before-income-taxes-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note I - Income Taxes - Component of Loss Before Income Taxes (Details)"
       }
      }
     },
     "localname": "statement-statement-note-i-income-taxes-component-of-loss-before-income-taxes-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note I - Income Taxes - Differences Between Total Income Tax (Benefit) Expense (Details)"
       }
      }
     },
     "localname": "statement-statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-i-income-taxes-income-tax-benefit-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note I - Income Taxes - Income Tax (Benefit) (Details)"
       }
      }
     },
     "localname": "statement-statement-note-i-income-taxes-income-tax-benefit-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note I - Income Taxes - Reconciliation of Deferred Tax Valuation Allowance (Details)"
       }
      }
     },
     "localname": "statement-statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note I - Income Taxes - Significant Portions of the Deferred Tax Assets and Deferred Tax Liabilities (Details)"
       }
      }
     },
     "localname": "statement-statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-i-income-taxes-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note I - Income Taxes"
       }
      }
     },
     "localname": "statement-statement-note-i-income-taxes-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note J - Earnings Per Share - Reconciliations of Basic and Diluted EPS (Details)"
       }
      }
     },
     "localname": "statement-statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-j-earnings-per-share-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note J - Earnings Per Share"
       }
      }
     },
     "localname": "statement-statement-note-j-earnings-per-share-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note K - Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Loss by Component (Details)"
       }
      }
     },
     "localname": "statement-statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-k-comprehensive-income-loss-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note K - Comprehensive Income (Loss)"
       }
      }
     },
     "localname": "statement-statement-note-k-comprehensive-income-loss-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-n-restructuring-activities-changes-in-liabilities-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note N - Restructuring Activities - Changes in Liabilities (Details)"
       }
      }
     },
     "localname": "statement-statement-note-n-restructuring-activities-changes-in-liabilities-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-n-restructuring-activities-restructuring-expense-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note N - Restructuring Activities - Restructuring Expense (Details)"
       }
      }
     },
     "localname": "statement-statement-note-n-restructuring-activities-restructuring-expense-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-n-restructuring-activities-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note N - Restructuring Activities"
       }
      }
     },
     "localname": "statement-statement-note-n-restructuring-activities-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-o-segment-reporting-financial-information-by-segment-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note O - Segment Reporting - Financial Information by Segment (Details)"
       }
      }
     },
     "localname": "statement-statement-note-o-segment-reporting-financial-information-by-segment-details",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-note-o-segment-reporting-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note O - Segment Reporting"
       }
      }
     },
     "localname": "statement-statement-note-o-segment-reporting-tables",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "hrth_statement-statement-significant-accounting-policies-policies": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Significant Accounting Policies"
       }
      }
     },
     "localname": "statement-statement-significant-accounting-policies-policies",
     "nsuri": "http://www.hartehanks.com/20211231",
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidationItemsAxis": {
     "auth_ref": [
      "r126",
      "r192",
      "r210",
      "r211",
      "r212",
      "r213",
      "r214",
      "r216",
      "r220",
      "r283",
      "r284",
      "r285",
      "r286",
      "r287",
      "r288",
      "r290",
      "r291",
      "r293",
      "r295",
      "r296"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Consolidation Items [Axis]"
       }
      }
     },
     "localname": "ConsolidationItemsAxis",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidationItemsDomain": {
     "auth_ref": [
      "r126",
      "r192",
      "r210",
      "r211",
      "r212",
      "r213",
      "r214",
      "r216",
      "r220",
      "r283",
      "r284",
      "r285",
      "r286",
      "r287",
      "r288",
      "r290",
      "r291",
      "r293",
      "r295",
      "r296"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Consolidation Items [Domain]"
       }
      }
     },
     "localname": "ConsolidationItemsDomain",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MajorCustomersAxis": {
     "auth_ref": [
      "r227",
      "r356",
      "r361",
      "r686"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Customer [Axis]"
       }
      }
     },
     "localname": "MajorCustomersAxis",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [
      "r301",
      "r329",
      "r460",
      "r470",
      "r626",
      "r627",
      "r628",
      "r629",
      "r630",
      "r631",
      "r632",
      "r684",
      "r687",
      "r729",
      "r730"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum [Member]"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [
      "r301",
      "r329",
      "r460",
      "r470",
      "r626",
      "r627",
      "r628",
      "r629",
      "r630",
      "r631",
      "r632",
      "r684",
      "r687",
      "r729",
      "r730"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Minimum [Member]"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_NameOfMajorCustomerDomain": {
     "auth_ref": [
      "r227",
      "r356",
      "r361",
      "r686"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Customer [Domain]"
       }
      }
     },
     "localname": "NameOfMajorCustomerDomain",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [
      "r301",
      "r329",
      "r395",
      "r460",
      "r470",
      "r626",
      "r627",
      "r628",
      "r629",
      "r630",
      "r631",
      "r632",
      "r684",
      "r687",
      "r729",
      "r730"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statistical Measurement [Axis]"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [
      "r301",
      "r329",
      "r395",
      "r460",
      "r470",
      "r626",
      "r627",
      "r628",
      "r629",
      "r630",
      "r631",
      "r632",
      "r684",
      "r687",
      "r729",
      "r730"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statistical Measurement [Domain]"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_SegmentGeographicalDomain": {
     "auth_ref": [
      "r224",
      "r225",
      "r356",
      "r360",
      "r685",
      "r720",
      "r721",
      "r722",
      "r723",
      "r724",
      "r725",
      "r726",
      "r727",
      "r728"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographical [Domain]"
       }
      }
     },
     "localname": "SegmentGeographicalDomain",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_StatementGeographicalAxis": {
     "auth_ref": [
      "r224",
      "r225",
      "r356",
      "r360",
      "r685",
      "r715",
      "r720",
      "r721",
      "r722",
      "r723",
      "r724",
      "r725",
      "r726",
      "r727",
      "r728"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographical [Axis]"
       }
      }
     },
     "localname": "StatementGeographicalAxis",
     "nsuri": "http://fasb.org/srt/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountingPoliciesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Accounting Policies [Abstract]"
       }
      }
     },
     "localname": "AccountingPoliciesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountsPayableCurrent": {
     "auth_ref": [
      "r44",
      "r622"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 3.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Accounts payable and accrued expenses"
       }
      }
     },
     "localname": "AccountsPayableCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccountsReceivableMember": {
     "auth_ref": [
      "r716"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Due from customers or clients for goods or services that have been delivered or sold.",
        "label": "Accounts Receivable [Member]"
       }
      }
     },
     "localname": "AccountsReceivableMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountsReceivableNetCurrent": {
     "auth_ref": [
      "r5",
      "r29",
      "r229",
      "r230"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 6.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.",
        "label": "Accounts receivable (less allowance of $266 at December 31, 2021 and $241 at December 31, 2020)"
       }
      }
     },
     "localname": "AccountsReceivableNetCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember": {
     "auth_ref": [
      "r59",
      "r64",
      "r74",
      "r75",
      "r76",
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.",
        "label": "Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]"
       }
      }
     },
     "localname": "AccumulatedDefinedBenefitPlansAdjustmentMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": {
     "auth_ref": [
      "r41",
      "r256"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 0.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.",
        "label": "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment",
        "negatedLabel": "Less accumulated depreciation"
       }
      }
     },
     "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax": {
     "auth_ref": [
      "r60",
      "r64",
      "r416"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).",
        "label": "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax",
        "verboseLabel": "Net loss"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r32",
      "r62",
      "r63",
      "r64",
      "r673",
      "r692",
      "r695"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 3.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.",
        "label": "Accumulated other comprehensive loss"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [
      "r61",
      "r64",
      "r74",
      "r75",
      "r76",
      "r128",
      "r129",
      "r130",
      "r562",
      "r688",
      "r689",
      "r742"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.",
        "label": "AOCI Attributable to Parent [Member]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedTranslationAdjustmentMember": {
     "auth_ref": [
      "r58",
      "r64",
      "r74",
      "r75",
      "r76",
      "r562",
      "r582",
      "r583",
      "r584",
      "r585",
      "r587"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated other comprehensive income (loss) resulting from foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to the parent.",
        "label": "Accumulated Foreign Currency Adjustment Attributable to Parent [Member]"
       }
      }
     },
     "localname": "AccumulatedTranslationAdjustmentMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdditionalPaidInCapitalCommonStock": {
     "auth_ref": [
      "r30"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.",
        "label": "Additional paid-in capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [
      "r128",
      "r129",
      "r130",
      "r504",
      "r505",
      "r506",
      "r568"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.",
        "label": "Additional Paid-in Capital [Member]"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": {
     "auth_ref": [
      "r472",
      "r474",
      "r510",
      "r511"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.",
        "label": "Stock-based compensation"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Adjustments to reconcile net income (loss) to net cash used in operating activities"
       }
      }
     },
     "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AllocatedShareBasedCompensationExpense": {
     "auth_ref": [
      "r474",
      "r501",
      "r509"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.",
        "label": "us-gaap_AllocatedShareBasedCompensationExpense",
        "terseLabel": "Share-based Payment Arrangement, Expense"
       }
      }
     },
     "localname": "AllocatedShareBasedCompensationExpense",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForDoubtfulAccountsReceivable": {
     "auth_ref": [
      "r231",
      "r241",
      "r242",
      "r245"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of allowance for credit loss on accounts receivable.",
        "label": "us-gaap_AllowanceForDoubtfulAccountsReceivable",
        "periodEndLabel": "Balance at end of year",
        "periodStartLabel": "Balance at beginning of year"
       }
      }
     },
     "localname": "AllowanceForDoubtfulAccountsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent": {
     "auth_ref": [
      "r36",
      "r231",
      "r241"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of allowance for credit loss on accounts receivable, classified as current.",
        "label": "Accounts receivable, allowance for doubtful accounts"
       }
      }
     },
     "localname": "AllowanceForDoubtfulAccountsReceivableCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs": {
     "auth_ref": [
      "r244"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of direct write-downs of accounts receivable charged against the allowance.",
        "label": "us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs",
        "negatedLabel": "Amounts recovered against the allowance"
       }
      }
     },
     "localname": "AllowanceForDoubtfulAccountsReceivableWriteOffs",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax": {
     "auth_ref": [
      "r446"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount recognized in net periodic benefit cost (credit) and other comprehensive (income) loss.",
        "label": "Net cost recognized in net periodic benefit cost and other comprehensive (income) loss"
       }
      }
     },
     "localname": "AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": {
     "auth_ref": [
      "r166"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.",
        "label": "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
        "terseLabel": "Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis": {
     "auth_ref": [
      "r166"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of antidilutive security.",
        "label": "Antidilutive Securities [Axis]"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AntidilutiveSecuritiesNameDomain": {
     "auth_ref": [
      "r166"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Incremental common shares attributable to securities that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.",
        "label": "Antidilutive Securities, Name [Domain]"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AreaOfRealEstateProperty": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area of a real estate property.",
        "label": "us-gaap_AreaOfRealEstateProperty",
        "terseLabel": "Area of Real Estate Property (Square Foot)"
       }
      }
     },
     "localname": "AreaOfRealEstateProperty",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual"
     ],
     "xbrltype": "areaItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r121",
      "r200",
      "r212",
      "r218",
      "r237",
      "r283",
      "r284",
      "r285",
      "r287",
      "r288",
      "r289",
      "r290",
      "r292",
      "r294",
      "r296",
      "r297",
      "r558",
      "r563",
      "r576",
      "r620",
      "r622",
      "r651",
      "r669"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "us-gaap_Assets",
        "totalLabel": "Total assets"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsCurrent": {
     "auth_ref": [
      "r7",
      "r9",
      "r57",
      "r121",
      "r237",
      "r283",
      "r284",
      "r285",
      "r287",
      "r288",
      "r289",
      "r290",
      "r292",
      "r294",
      "r296",
      "r297",
      "r558",
      "r563",
      "r576",
      "r620",
      "r622"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 3.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "us-gaap_AssetsCurrent",
        "totalLabel": "Total current assets"
       }
      }
     },
     "localname": "AssetsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsCurrentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Current assets"
       }
      }
     },
     "localname": "AssetsCurrentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AwardTypeAxis": {
     "auth_ref": [
      "r475",
      "r503"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of award under share-based payment arrangement.",
        "label": "Award Type [Axis]"
       }
      }
     },
     "localname": "AwardTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BalanceSheetLocationAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by location on balance sheet (statement of financial position).",
        "label": "Balance Sheet Location [Axis]"
       }
      }
     },
     "localname": "BalanceSheetLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BalanceSheetLocationDomain": {
     "auth_ref": [
      "r565",
      "r566"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Location in the balance sheet (statement of financial position).",
        "label": "Balance Sheet Location [Domain]"
       }
      }
     },
     "localname": "BalanceSheetLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BuildingAndBuildingImprovementsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Facility held for productive use including, but not limited to, office, production, storage and distribution facilities and any addition, improvement, or renovation to the structure, for example, but not limited to, interior masonry, interior flooring, electrical, and plumbing.",
        "label": "Building and Building Improvements [Member]"
       }
      }
     },
     "localname": "BuildingAndBuildingImprovementsMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BuildingsAndImprovementsGross": {
     "auth_ref": [
      "r10",
      "r255"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 3.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.",
        "label": "Buildings and improvements"
       }
      }
     },
     "localname": "BuildingsAndImprovementsGross",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CapitalExpendituresIncurredButNotYetPaid": {
     "auth_ref": [
      "r111",
      "r112",
      "r113"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Future cash outflow to pay for purchases of fixed assets that have occurred.",
        "label": "Purchases of property, plant and equipment included in accounts payable and accrued expense"
       }
      }
     },
     "localname": "CapitalExpendituresIncurredButNotYetPaid",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CapitalizedComputerSoftwareGross": {
     "auth_ref": [
      "r731"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 1.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.",
        "label": "Software"
       }
      }
     },
     "localname": "CapitalizedComputerSoftwareGross",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CapitalizedContractCostImpairmentLoss": {
     "auth_ref": [
      "r249"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.",
        "label": "us-gaap_CapitalizedContractCostImpairmentLoss",
        "terseLabel": "Capitalized Contract Cost, Impairment Loss"
       }
      }
     },
     "localname": "CapitalizedContractCostImpairmentLoss",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CapitalizedContractCostNet": {
     "auth_ref": [
      "r248"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.",
        "label": "us-gaap_CapitalizedContractCostNet",
        "terseLabel": "Capitalized Contract Cost, Net, Total"
       }
      }
     },
     "localname": "CapitalizedContractCostNet",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r4",
      "r38",
      "r108"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 0.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash and cash equivalents"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsPolicyTextBlock": {
     "auth_ref": [
      "r14",
      "r109"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.",
        "label": "Cash and Cash Equivalents, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "CashAndCashEquivalentsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy": {
     "auth_ref": [
      "r14",
      "r109",
      "r650"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Entity's cash and cash equivalents accounting policy with respect to restricted balances.  Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.",
        "label": "Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r102",
      "r108",
      "r114"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
        "periodEndLabel": "Cash and cash equivalents and restricted cash at end of year",
        "periodStartLabel": "Cash and cash equivalents and restricted cash at beginning of year"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": {
     "auth_ref": [
      "r102",
      "r580"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
        "totalLabel": "Net decrease in cash and cash equivalents and restricted cash"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClassOfStockDomain": {
     "auth_ref": [
      "r119",
      "r121",
      "r151",
      "r152",
      "r157",
      "r161",
      "r165",
      "r174",
      "r175",
      "r176",
      "r237",
      "r283",
      "r288",
      "r289",
      "r290",
      "r296",
      "r297",
      "r326",
      "r327",
      "r330",
      "r331",
      "r576",
      "r739"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share of stock differentiated by the voting rights the holder receives. Examples include, but are not limited to, common stock, redeemable preferred stock, nonredeemable preferred stock, and convertible stock.",
        "label": "Class of Stock [Domain]"
       }
      }
     },
     "localname": "ClassOfStockDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": {
     "auth_ref": [
      "r276",
      "r277",
      "r278",
      "r280",
      "r717"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for commitments and contingencies.",
        "label": "Commitments and Contingencies Disclosure [Text Block]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [
      "r128",
      "r129",
      "r568"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r28"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face amount or stated value per share of common stock.",
        "label": "Common stock, par value (in dollars per share)"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r28"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.",
        "label": "Common stock, shares authorized (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r28"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.",
        "label": "Common stock, shares issued (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesOutstanding": {
     "auth_ref": [
      "r28",
      "r333"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.",
        "label": "Common stock, shares outstanding (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r28",
      "r622"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 4.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Common stock, $1 par value, 25,000,000 shares authorized,12,121,484 shares issued, 6,976,144 and 6,599,309 shares outstanding at December 31, 2021 and December 31, 2020, respectively"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTax": {
     "auth_ref": [
      "r69",
      "r71",
      "r72",
      "r82",
      "r660",
      "r679"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "us-gaap_ComprehensiveIncomeNetOfTax",
        "totalLabel": "Comprehensive income (loss)"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Comprehensive income (loss), net of tax"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ComprehensiveIncomeNoteTextBlock": {
     "auth_ref": [
      "r81",
      "r93",
      "r659",
      "r678"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.",
        "label": "Comprehensive Income (Loss) Note [Text Block]"
       }
      }
     },
     "localname": "ComprehensiveIncomeNoteTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ConcentrationRiskBenchmarkDomain": {
     "auth_ref": [
      "r182",
      "r183",
      "r227",
      "r574",
      "r575",
      "r716"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The denominator in a calculation of a disclosed concentration risk percentage.",
        "label": "Concentration Risk Benchmark [Domain]"
       }
      }
     },
     "localname": "ConcentrationRiskBenchmarkDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConcentrationRiskByBenchmarkAxis": {
     "auth_ref": [
      "r182",
      "r183",
      "r227",
      "r574",
      "r575",
      "r696",
      "r716"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by benchmark of concentration risk.",
        "label": "Concentration Risk Benchmark [Axis]"
       }
      }
     },
     "localname": "ConcentrationRiskByBenchmarkAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskByTypeAxis": {
     "auth_ref": [
      "r182",
      "r183",
      "r227",
      "r574",
      "r575",
      "r696",
      "r716"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of concentration risk, for example, but not limited to, asset, liability, net assets, geographic, customer, employees, supplier, lender.",
        "label": "Concentration Risk Type [Axis]"
       }
      }
     },
     "localname": "ConcentrationRiskByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskPercentage1": {
     "auth_ref": [
      "r182",
      "r183",
      "r227",
      "r574",
      "r575"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the \"benchmark\" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.",
        "label": "us-gaap_ConcentrationRiskPercentage1",
        "terseLabel": "Concentration Risk, Percentage"
       }
      }
     },
     "localname": "ConcentrationRiskPercentage1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ConcentrationRiskTypeDomain": {
     "auth_ref": [
      "r182",
      "r183",
      "r227",
      "r574",
      "r575",
      "r716"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, identifies the type (for example, asset, liability, net assets, geographic, customer, employees, supplier, lender) of the concentration.",
        "label": "Concentration Risk Type [Domain]"
       }
      }
     },
     "localname": "ConcentrationRiskTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConsolidationPolicyTextBlock": {
     "auth_ref": [
      "r116",
      "r560"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting.  The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.",
        "label": "Consolidation, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "ConsolidationPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ConstructionInProgressGross": {
     "auth_ref": [
      "r255"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 0.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.",
        "label": "Software development and equipment installations in progress"
       }
      }
     },
     "localname": "ConstructionInProgressGross",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock": {
     "auth_ref": [
      "r346"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.",
        "label": "Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]"
       }
      }
     },
     "localname": "ContractWithCustomerAssetAndLiabilityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ContractWithCustomerAssetNetCurrent": {
     "auth_ref": [
      "r343",
      "r345",
      "r357"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 4.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.",
        "label": "Contract assets",
        "terseLabel": "Contract assets"
       }
      }
     },
     "localname": "ContractWithCustomerAssetNetCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-contract-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityCurrent": {
     "auth_ref": [
      "r343",
      "r344",
      "r357"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 0.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.",
        "label": "Deferred revenue and customer advances",
        "terseLabel": "Deferred revenue and customer advances"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-contract-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityNoncurrent": {
     "auth_ref": [
      "r343",
      "r344",
      "r357"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.",
        "label": "us-gaap_ContractWithCustomerLiabilityNoncurrent",
        "terseLabel": "Deferred revenue included in other long-term liabilities"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-contract-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityRevenueRecognized": {
     "auth_ref": [
      "r358"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.",
        "label": "us-gaap_ContractWithCustomerLiabilityRevenueRecognized",
        "terseLabel": "Contract with Customer, Liability, Revenue Recognized"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityRevenueRecognized",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConvertiblePreferredStockMember": {
     "auth_ref": [
      "r326",
      "r327",
      "r330"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Preferred stock that may be exchanged into common shares or other types of securities at the owner's option.",
        "label": "Convertible Preferred Stock [Member]"
       }
      }
     },
     "localname": "ConvertiblePreferredStockMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion": {
     "auth_ref": [
      "r26",
      "r27",
      "r332",
      "r334",
      "r335"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares issued for each share of convertible preferred stock that is converted.",
        "label": "us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion",
        "terseLabel": "Convertible Preferred Stock, Shares Issued upon Conversion (in shares)"
       }
      }
     },
     "localname": "ConvertiblePreferredStockSharesIssuedUponConversion",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CorporateNonSegmentMember": {
     "auth_ref": [
      "r210",
      "r211",
      "r212",
      "r213",
      "r214",
      "r220",
      "r222"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Corporate headquarters or functional department that may not earn revenues or may earn revenues that are only incidental to the activities of the entity and is not considered an operating segment.",
        "label": "Corporate, Non-Segment [Member]"
       }
      }
     },
     "localname": "CorporateNonSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CostOfGoodsAndServicesSoldOverhead": {
     "auth_ref": [
      "r85"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details": {
       "order": 0.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indirect cost incurred related to good produced and service rendered.",
        "label": "Overhead Allocation"
       }
      }
     },
     "localname": "CostOfGoodsAndServicesSoldOverhead",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CostsAndExpenses": {
     "auth_ref": [
      "r87"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total costs of sales and operating expenses for the period.",
        "label": "us-gaap_CostsAndExpenses",
        "totalLabel": "Total operating expenses"
       }
      }
     },
     "localname": "CostsAndExpenses",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CreditFacilityAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.",
        "label": "Credit Facility [Axis]"
       }
      }
     },
     "localname": "CreditFacilityAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CreditFacilityDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.",
        "label": "Credit Facility [Domain]"
       }
      }
     },
     "localname": "CreditFacilityDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CurrentFederalTaxExpenseBenefit": {
     "auth_ref": [
      "r122",
      "r534",
      "r544"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": 2.0,
       "parentTag": "us-gaap_CurrentIncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "us-gaap_CurrentFederalTaxExpenseBenefit",
        "terseLabel": "Federal"
       }
      }
     },
     "localname": "CurrentFederalTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CurrentForeignTaxExpenseBenefit": {
     "auth_ref": [
      "r122",
      "r534"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": 0.0,
       "parentTag": "us-gaap_CurrentIncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "us-gaap_CurrentForeignTaxExpenseBenefit",
        "terseLabel": "Foreign"
       }
      }
     },
     "localname": "CurrentForeignTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CurrentIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r122",
      "r534",
      "r544",
      "r546"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.",
        "label": "us-gaap_CurrentIncomeTaxExpenseBenefit",
        "totalLabel": "Total current"
       }
      }
     },
     "localname": "CurrentIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CurrentStateAndLocalTaxExpenseBenefit": {
     "auth_ref": [
      "r122",
      "r534",
      "r544"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": 1.0,
       "parentTag": "us-gaap_CurrentIncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "us-gaap_CurrentStateAndLocalTaxExpenseBenefit",
        "terseLabel": "State and local"
       }
      }
     },
     "localname": "CurrentStateAndLocalTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CustomerConcentrationRiskMember": {
     "auth_ref": [
      "r181",
      "r227"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reflects the percentage that revenues in the period from one or more significant customers is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of a significant customer.",
        "label": "Customer Concentration Risk [Member]"
       }
      }
     },
     "localname": "CustomerConcentrationRiskMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtInstrumentAxis": {
     "auth_ref": [
      "r18",
      "r20",
      "r21",
      "r120",
      "r126",
      "r298",
      "r299",
      "r300",
      "r301",
      "r302",
      "r303",
      "r304",
      "r305",
      "r306",
      "r307",
      "r308",
      "r309",
      "r310",
      "r311",
      "r312",
      "r313",
      "r314",
      "r318",
      "r319",
      "r320",
      "r321",
      "r591",
      "r652",
      "r655",
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of debt instrument, including, but not limited to, draws against credit facilities.",
        "label": "Debt Instrument [Axis]"
       }
      }
     },
     "localname": "DebtInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentBasisSpreadOnVariableRate1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage points added to the reference rate to compute the variable rate on the debt instrument.",
        "label": "us-gaap_DebtInstrumentBasisSpreadOnVariableRate1",
        "terseLabel": "Debt Instrument, Basis Spread on Variable Rate"
       }
      }
     },
     "localname": "DebtInstrumentBasisSpreadOnVariableRate1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentInterestRateEffectivePercentage": {
     "auth_ref": [
      "r50",
      "r316",
      "r590",
      "r591"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.",
        "label": "us-gaap_DebtInstrumentInterestRateEffectivePercentage",
        "terseLabel": "Debt Instrument, Interest Rate, Effective Percentage"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateEffectivePercentage",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentNameDomain": {
     "auth_ref": [
      "r51",
      "r120",
      "r126",
      "r298",
      "r299",
      "r300",
      "r301",
      "r302",
      "r303",
      "r304",
      "r305",
      "r306",
      "r307",
      "r308",
      "r309",
      "r310",
      "r311",
      "r312",
      "r313",
      "r314",
      "r318",
      "r319",
      "r320",
      "r321",
      "r591"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The name for the particular debt instrument or borrowing that distinguishes it from other debt instruments or borrowings, including draws against credit facilities.",
        "label": "Debt Instrument, Name [Domain]"
       }
      }
     },
     "localname": "DebtInstrumentNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtInstrumentTerm": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "us-gaap_DebtInstrumentTerm",
        "terseLabel": "Debt Instrument, Term (Year)"
       }
      }
     },
     "localname": "DebtInstrumentTerm",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_DebtSecuritiesMember": {
     "auth_ref": [
      "r236"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions.",
        "label": "Debt Securities [Member]"
       }
      }
     },
     "localname": "DebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DeferredFederalIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r122",
      "r535",
      "r544"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredIncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "us-gaap_DeferredFederalIncomeTaxExpenseBenefit",
        "verboseLabel": "Federal"
       }
      }
     },
     "localname": "DeferredFederalIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredForeignIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r122",
      "r535",
      "r544"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": 2.0,
       "parentTag": "us-gaap_DeferredIncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "us-gaap_DeferredForeignIncomeTaxExpenseBenefit",
        "verboseLabel": "Foreign"
       }
      }
     },
     "localname": "DeferredForeignIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r106",
      "r122",
      "r535",
      "r544",
      "r545",
      "r546"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "Deferred income taxes",
        "totalLabel": "Total deferred"
       }
      }
     },
     "localname": "DeferredIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxLiabilities": {
     "auth_ref": [
      "r23",
      "r24",
      "r525",
      "r653",
      "r666"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DeferredTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences.",
        "label": "us-gaap_DeferredIncomeTaxLiabilities",
        "negatedTotalLabel": "Total gross deferred tax liabilities"
       }
      }
     },
     "localname": "DeferredIncomeTaxLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r122",
      "r535",
      "r544"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DeferredIncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit",
        "verboseLabel": "State and local"
       }
      }
     },
     "localname": "DeferredStateAndLocalIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetInterestCarryforward": {
     "auth_ref": [
      "r532"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 13.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible interest carryforward.",
        "label": "Interest Expense limitations"
       }
      }
     },
     "localname": "DeferredTaxAssetInterestCarryforward",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 14.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill.",
        "label": "Goodwill"
       }
      }
     },
     "localname": "DeferredTaxAssetsGoodwillAndIntangibleAssets",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsGross": {
     "auth_ref": [
      "r526"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredTaxAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.",
        "label": "us-gaap_DeferredTaxAssetsGross",
        "totalLabel": "Total gross deferred tax assets"
       }
      }
     },
     "localname": "DeferredTaxAssetsGross",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 7.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the entity's investment in its wholly-owned subsidiaries.",
        "label": "Investment in foreign subsidiaries, outside basis difference"
       }
      }
     },
     "localname": "DeferredTaxAssetsInvestmentInSubsidiaries",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsNet": {
     "auth_ref": [
      "r528"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredTaxLiabilities",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.",
        "label": "us-gaap_DeferredTaxAssetsNet",
        "totalLabel": "Net deferred tax assets"
       }
      }
     },
     "localname": "DeferredTaxAssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.",
        "label": "Federal net operating loss carryforwards"
       }
      }
     },
     "localname": "DeferredTaxAssetsOperatingLossCarryforwardsDomestic",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 11.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards.",
        "label": "Foreign net operating loss carryforwards"
       }
      }
     },
     "localname": "DeferredTaxAssetsOperatingLossCarryforwardsForeign",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 3.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.",
        "label": "State net operating loss carryforwards"
       }
      }
     },
     "localname": "DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsOther": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 12.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.",
        "label": "us-gaap_DeferredTaxAssetsOther",
        "verboseLabel": "Other, net"
       }
      }
     },
     "localname": "DeferredTaxAssetsOther",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign": {
     "auth_ref": [
      "r531",
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 2.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards.",
        "label": "Foreign tax credit carryforwards"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxCreditCarryforwardsForeign",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch": {
     "auth_ref": [
      "r531",
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards.",
        "label": "Research &amp; Development Tax Credit Carryforward",
        "terseLabel": "Deferred Tax Assets, Tax Credit Carryforwards, Research"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxCreditCarryforwardsResearch",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 9.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation.",
        "label": "Accrued payroll not deductible until paid"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 10.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.",
        "label": "Employee stock-based compensation"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 5.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.",
        "label": "Accrued expenses not deductible until paid"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 8.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from allowance for credit loss on accounts receivable.",
        "label": "Accounts receivable, net"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsValuationAllowance": {
     "auth_ref": [
      "r527"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DeferredTaxAssetsNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.",
        "label": "us-gaap_DeferredTaxAssetsValuationAllowance",
        "negatedLabel": "Less valuation allowances",
        "periodEndLabel": "Balance",
        "periodStartLabel": "Balance",
        "terseLabel": "Deferred Tax Assets, Valuation Allowance, Total"
       }
      }
     },
     "localname": "DeferredTaxAssetsValuationAllowance",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilities": {
     "auth_ref": [
      "r517",
      "r528"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.",
        "label": "us-gaap_DeferredTaxLiabilities",
        "negatedTotalLabel": "Net deferred tax assets (liabilities)"
       }
      }
     },
     "localname": "DeferredTaxLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesOther": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences classified as other.",
        "label": "us-gaap_DeferredTaxLiabilitiesOther",
        "negatedTerseLabel": "Other, net"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesOther",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesPrepaidExpenses": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax consequences attributable to taxable temporary differences derived from prepaid expenses.",
        "label": "us-gaap_DeferredTaxLiabilitiesPrepaidExpenses",
        "negatedLabel": "Prepaid Expenses"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesPrepaidExpenses",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment": {
     "auth_ref": [
      "r532",
      "r533"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details": {
       "order": 3.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.",
        "label": "us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment",
        "negatedLabel": "Property, plant and equipment"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets": {
     "auth_ref": [
      "r385",
      "r446"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.",
        "label": "us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets",
        "terseLabel": "Actual return on plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanActualReturnOnPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanActuarialGainLoss": {
     "auth_ref": [
      "r378"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.",
        "label": "us-gaap_DefinedBenefitPlanActuarialGainLoss",
        "negatedTerseLabel": "Actuarial (gain) loss"
       }
      }
     },
     "localname": "DefinedBenefitPlanActuarialGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit": {
     "auth_ref": [
      "r372",
      "r411",
      "r440"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss), recognized immediately as component of net periodic benefit (cost) credit, for change in value of benefit obligation or plan assets from experience different from that assumed, change in actuarial assumption, or consequence of temporarily deviating from substantive plan. Includes, but is not limited to, amount in excess of ten percent of greater of fair value of plan assets or benefit obligation.",
        "label": "us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit",
        "negatedLabel": "Recognized actuarial loss"
       }
      }
     },
     "localname": "DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate": {
     "auth_ref": [
      "r418"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.",
        "label": "Weighted-average assumptions used to determine benefit obligations, discount rate"
       }
      }
     },
     "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate": {
     "auth_ref": [
      "r418"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.",
        "label": "Weighted-average assumptions used to determine net periodic benefit cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets": {
     "auth_ref": [
      "r420",
      "r445"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.",
        "label": "Expected return on plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedBenefitPlanBenefitObligation": {
     "auth_ref": [
      "r373"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
        "label": "us-gaap_DefinedBenefitPlanBenefitObligation",
        "periodEndLabel": "Benefit obligation at end of year",
        "periodStartLabel": "Benefit obligation at beginning of year"
       }
      }
     },
     "localname": "DefinedBenefitPlanBenefitObligation",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid": {
     "auth_ref": [
      "r380",
      "r450"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.",
        "label": "us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid",
        "negatedTerseLabel": "Benefits paid"
       }
      }
     },
     "localname": "DefinedBenefitPlanBenefitObligationBenefitsPaid",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis": {
     "auth_ref": [
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r423",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by defined benefit plan asset investment.",
        "label": "Defined Benefit Plan, Plan Assets, Category [Axis]"
       }
      }
     },
     "localname": "DefinedBenefitPlanByPlanAssetCategoriesAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanContributionsByEmployer": {
     "auth_ref": [
      "r387",
      "r396",
      "r398",
      "r444",
      "r446",
      "r447"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of contribution received by defined benefit plan from employer which increases plan assets.",
        "label": "us-gaap_DefinedBenefitPlanContributionsByEmployer",
        "terseLabel": "Contributions"
       }
      }
     },
     "localname": "DefinedBenefitPlanContributionsByEmployer",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanEquitySecuritiesMember": {
     "auth_ref": [
      "r396",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Security representing ownership in corporation or other legal entity for which ownership is represented by share of stock, in which defined benefit plan asset is invested. Includes, but is not limited to, common stock, preferred stock, convertible security, stock right and stock warrant.",
        "label": "Defined Benefit Plan, Equity Securities [Member]"
       }
      }
     },
     "localname": "DefinedBenefitPlanEquitySecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember": {
     "auth_ref": [
      "r396",
      "r398",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Security representing ownership in corporation or other legal entity, not domiciled in United States of America (US), for which ownership is represented by share of stock; in which defined benefit plan asset is invested. Includes, but is not limited to, common stock, preferred stock, convertible security, stock right and stock warrant.",
        "label": "Defined Benefit Plan, Equity Securities, Non-US [Member]"
       }
      }
     },
     "localname": "DefinedBenefitPlanEquitySecuritiesNonUsMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DefinedBenefitPlanEquitySecuritiesUsLargeCapMember": {
     "auth_ref": [
      "r396",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Security representing ownership in corporation or other legal entity, domiciled in United States of America (US), classified as having large market capitalization, for which ownership is represented by share of stock; in which defined benefit plan asset is invested. Includes, but is not limited to, common stock, preferred stock, convertible security, stock right and stock warrant.",
        "label": "Defined Benefit Plan, Equity Securities, US, Large Cap [Member]"
       }
      }
     },
     "localname": "DefinedBenefitPlanEquitySecuritiesUsLargeCapMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DefinedBenefitPlanEquitySecuritiesUsMidCapMember": {
     "auth_ref": [
      "r396"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Security representing ownership in corporation or other legal entity, domiciled in United States of America (US), classified as having medium market capitalization, for which ownership is represented by share of stock; in which defined benefit plan asset is invested. Includes, but is not limited to, common stock, preferred stock, convertible security, stock right and stock warrant.",
        "label": "Defined Benefit Plan, Equity Securities, US, Mid Cap [Member]"
       }
      }
     },
     "localname": "DefinedBenefitPlanEquitySecuritiesUsMidCapMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DefinedBenefitPlanEquitySecuritiesUsSmallCapMember": {
     "auth_ref": [
      "r396"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Security representing ownership in corporation or other legal entity, domiciled in United States of America (US), classified as having small market capitalization, for which ownership is represented by share of stock; in which defined benefit plan asset is invested. Includes, but is not limited to, common stock, preferred stock, convertible security, stock right and stock warrant.",
        "label": "Defined Benefit Plan, Equity Securities, US, Small Cap [Member]"
       }
      }
     },
     "localname": "DefinedBenefitPlanEquitySecuritiesUsSmallCapMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear": {
     "auth_ref": [
      "r429"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.",
        "label": "us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear",
        "terseLabel": "Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter": {
     "auth_ref": [
      "r405"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details": {
       "order": 0.0,
       "parentTag": "hrth_DefinedBenefitPlanExpectedFutureBenefitPayments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.",
        "label": "2027 - 2031"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths": {
     "auth_ref": [
      "r405"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details": {
       "order": 5.0,
       "parentTag": "hrth_DefinedBenefitPlanExpectedFutureBenefitPayments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.",
        "label": "2022",
        "terseLabel": "Defined Benefit Plan, Expected Future Benefit Payment, Year One"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive": {
     "auth_ref": [
      "r405"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details": {
       "order": 1.0,
       "parentTag": "hrth_DefinedBenefitPlanExpectedFutureBenefitPayments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.",
        "label": "2026"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour": {
     "auth_ref": [
      "r405"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details": {
       "order": 2.0,
       "parentTag": "hrth_DefinedBenefitPlanExpectedFutureBenefitPayments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.",
        "label": "2025"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree": {
     "auth_ref": [
      "r405"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details": {
       "order": 3.0,
       "parentTag": "hrth_DefinedBenefitPlanExpectedFutureBenefitPayments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.",
        "label": "2024"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo": {
     "auth_ref": [
      "r405"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details": {
       "order": 4.0,
       "parentTag": "hrth_DefinedBenefitPlanExpectedFutureBenefitPayments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.",
        "label": "2023"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets": {
     "auth_ref": [
      "r372",
      "r410",
      "r439",
      "r446",
      "r447"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.",
        "label": "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets",
        "negatedTerseLabel": "Expected return on plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedReturnOnPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanFairValueOfPlanAssets": {
     "auth_ref": [
      "r384",
      "r396",
      "r398",
      "r399",
      "r446"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.",
        "label": "Total plan assets",
        "periodEndLabel": "Fair value of plan assets at end of year",
        "periodStartLabel": "Fair value of plan assets at beginning of year"
       }
      }
     },
     "localname": "DefinedBenefitPlanFairValueOfPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanFundedStatusOfPlan": {
     "auth_ref": [
      "r370",
      "r393",
      "r446"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.",
        "label": "us-gaap_DefinedBenefitPlanFundedStatusOfPlan",
        "terseLabel": "Funded status at end of year"
       }
      }
     },
     "localname": "DefinedBenefitPlanFundedStatusOfPlan",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanInterestCost": {
     "auth_ref": [
      "r372",
      "r376",
      "r409",
      "r438",
      "r446",
      "r447"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details": {
       "order": 2.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.",
        "label": "Interest cost",
        "terseLabel": "Interest cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanInterestCost",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": {
     "auth_ref": [
      "r407",
      "r436",
      "r446",
      "r447"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.",
        "label": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
        "totalLabel": "Net periodic benefit cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanNetPeriodicBenefitCost",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation": {
     "auth_ref": [
      "r432",
      "r433",
      "r446"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.",
        "label": "Accumulated benefit obligation",
        "terseLabel": "Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation"
       }
      }
     },
     "localname": "DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets": {
     "auth_ref": [
      "r432",
      "r433",
      "r446"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.",
        "label": "Fair value of plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation": {
     "auth_ref": [
      "r432"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.",
        "label": "Projected benefit obligation"
       }
      }
     },
     "localname": "DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid": {
     "auth_ref": [
      "r389",
      "r450"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.",
        "label": "us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid",
        "negatedTerseLabel": "Benefits paid",
        "terseLabel": "Defined Benefit Plan, Plan Assets, Benefits Paid"
       }
      }
     },
     "localname": "DefinedBenefitPlanPlanAssetsBenefitsPaid",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPlanAssetsCategoryTableTextBlock": {
     "auth_ref": [
      "r396",
      "r398"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of defined benefit plan asset investment. Includes, but is not limited to, fair value of category of plan asset and its level within fair value hierarchy.",
        "label": "Defined Benefit Plan, Plan Assets, Category [Table Text Block]"
       }
      }
     },
     "localname": "DefinedBenefitPlanPlanAssetsCategoryTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage": {
     "auth_ref": [
      "r395",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.",
        "label": "Target rate"
       }
      }
     },
     "localname": "DefinedBenefitPlanPlanAssetsTargetAllocationPercentage",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations": {
     "auth_ref": [
      "r395"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.",
        "label": "Total plan assets, percentage"
       }
      }
     },
     "localname": "DefinedBenefitPlanWeightedAverageAssetAllocations",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_Depreciation": {
     "auth_ref": [
      "r106",
      "r254"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.",
        "label": "Depreciation"
       }
      }
     },
     "localname": "Depreciation",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepreciationAndAmortization": {
     "auth_ref": [
      "r106",
      "r254"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.",
        "label": "Depreciation expense"
       }
      }
     },
     "localname": "DepreciationAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepreciationDepletionAndAmortization": {
     "auth_ref": [
      "r106",
      "r195"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.",
        "label": "us-gaap_DepreciationDepletionAndAmortization",
        "verboseLabel": "Depreciation expense"
       }
      }
     },
     "localname": "DepreciationDepletionAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DilutiveSecurities": {
     "auth_ref": [
      "r167"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.",
        "label": "Add back: Allocation of earnings to participating securities"
       }
      }
     },
     "localname": "DilutiveSecurities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisaggregationOfRevenueTableTextBlock": {
     "auth_ref": [
      "r356"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.",
        "label": "Disaggregation of Revenue [Table Text Block]"
       }
      }
     },
     "localname": "DisaggregationOfRevenueTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock": {
     "auth_ref": [
      "r512"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for share-based payment arrangement.",
        "label": "Share-based Payment Arrangement [Text Block]"
       }
      }
     },
     "localname": "DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DisclosureTextBlockAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "us-gaap_DisclosureTextBlockAbstract",
        "terseLabel": "Notes to Financial Statements"
       }
      }
     },
     "localname": "DisclosureTextBlockAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-b-recent-accounting-pronouncements",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies",
      "http://www.hartehanks.com/20211231/role/statement-note-m-certain-relationships-and-related-party-transactions",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DomesticCountryMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Designated tax department of the government that is entitled to levy and collect income taxes from the entity in its country of domicile.",
        "label": "Domestic Tax Authority [Member]"
       }
      }
     },
     "localname": "DomesticCountryMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EarningsPerShareAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Earnings (loss) per common share"
       }
      }
     },
     "localname": "EarningsPerShareAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasic": {
     "auth_ref": [
      "r83",
      "r137",
      "r138",
      "r139",
      "r140",
      "r141",
      "r148",
      "r151",
      "r161",
      "r164",
      "r165",
      "r170",
      "r171",
      "r569",
      "r570",
      "r661",
      "r680"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.",
        "label": "Basic (in dollars per share)"
       }
      }
     },
     "localname": "EarningsPerShareBasic",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareDiluted": {
     "auth_ref": [
      "r83",
      "r137",
      "r138",
      "r139",
      "r140",
      "r141",
      "r151",
      "r161",
      "r164",
      "r165",
      "r170",
      "r171",
      "r569",
      "r570",
      "r661",
      "r680"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.",
        "label": "Diluted (in dollars per share)"
       }
      }
     },
     "localname": "EarningsPerShareDiluted",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerSharePolicyTextBlock": {
     "auth_ref": [
      "r166",
      "r168"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.",
        "label": "Earnings Per Share, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "EarningsPerSharePolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EarningsPerShareTextBlock": {
     "auth_ref": [
      "r166",
      "r168",
      "r169",
      "r172"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for earnings per share.",
        "label": "Earnings Per Share [Text Block]"
       }
      }
     },
     "localname": "EarningsPerShareTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r580"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies. Excludes amounts for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Effect of exchange rate changes on cash, cash equivalents and restricted cash"
       }
      }
     },
     "localname": "EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": {
     "auth_ref": [
      "r124",
      "r519",
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of domestic federal statutory tax rate applicable to pretax income (loss).",
        "label": "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate",
        "terseLabel": "Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EmployeeRelatedLiabilitiesCurrent": {
     "auth_ref": [
      "r48"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Accrued payroll and related expenses"
       }
      }
     },
     "localname": "EmployeeRelatedLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized": {
     "auth_ref": [
      "r502"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost not yet recognized for nonvested award under share-based payment arrangement.",
        "label": "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized",
        "terseLabel": "Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1": {
     "auth_ref": [
      "r502"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1",
        "terseLabel": "Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions": {
     "auth_ref": [
      "r502"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.",
        "label": "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions",
        "terseLabel": "Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmployeeSeveranceMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Termination of an employee associated with exit from or disposal of business activities or restructurings pursuant to a plan.",
        "label": "Employee Severance [Member]"
       }
      }
     },
     "localname": "EmployeeSeveranceMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EmployeeStockOptionMember": {
     "auth_ref": [
      "r500"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share-based payment arrangement granting right, subject to vesting and other restrictions, to purchase or sell certain number of shares at predetermined price for specified period of time.",
        "label": "Share-based Payment Arrangement, Option [Member]"
       }
      }
     },
     "localname": "EmployeeStockOptionMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r0",
      "r74",
      "r75",
      "r76",
      "r128",
      "r129",
      "r130",
      "r134",
      "r142",
      "r144",
      "r173",
      "r238",
      "r333",
      "r339",
      "r504",
      "r505",
      "r506",
      "r537",
      "r538",
      "r568",
      "r581",
      "r582",
      "r583",
      "r584",
      "r585",
      "r587",
      "r688",
      "r689",
      "r690",
      "r742"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.",
        "label": "Equity Component [Domain]"
       }
      }
     },
     "localname": "EquityComponentDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquitySecuritiesMember": {
     "auth_ref": [
      "r15",
      "r19",
      "r236",
      "r668",
      "r712",
      "r713",
      "r714"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common or preferred stock, convertible securities, stock rights, or stock warrants.",
        "label": "Equity Securities [Member]"
       }
      }
     },
     "localname": "EquitySecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FacilityClosingMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Closing of a facility associated with exit from or disposal of business activities or restructurings pursuant to a plan.",
        "label": "Facility Closing [Member]"
       }
      }
     },
     "localname": "FacilityClosingMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r307",
      "r318",
      "r319",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r446",
      "r571",
      "r623",
      "r624",
      "r625"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.",
        "label": "Fair Value Hierarchy and NAV [Axis]"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r307",
      "r396",
      "r398",
      "r403",
      "r446",
      "r571",
      "r623"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.",
        "label": "Fair Value, Inputs, Level 1 [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r307",
      "r318",
      "r319",
      "r396",
      "r398",
      "r403",
      "r446",
      "r571",
      "r624"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.",
        "label": "Fair Value, Inputs, Level 2 [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r307",
      "r318",
      "r319",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r446",
      "r571",
      "r625"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Inputs, Level 3 [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [
      "r307",
      "r318",
      "r319",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r446",
      "r623",
      "r624",
      "r625"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.",
        "label": "Fair Value Hierarchy and NAV [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueOfFinancialInstrumentsPolicy": {
     "auth_ref": [
      "r572",
      "r573"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for determining the fair value of financial instruments.",
        "label": "Fair Value of Financial Instruments, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "FairValueOfFinancialInstrumentsPolicy",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FinanceLeaseInterestExpense": {
     "auth_ref": [
      "r595",
      "r601",
      "r610"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details": {
       "order": 0.0,
       "parentTag": "hrth_FinanceLeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of interest expense on finance lease liability.",
        "label": "Interest on lease liabilities"
       }
      }
     },
     "localname": "FinanceLeaseInterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseInterestPaymentOnLiability": {
     "auth_ref": [
      "r597",
      "r605"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of interest paid on finance lease liability.",
        "label": "Operating cash flows from finance leases"
       }
      }
     },
     "localname": "FinanceLeaseInterestPaymentOnLiability",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiability": {
     "auth_ref": [
      "r594",
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from finance lease.",
        "label": "us-gaap_FinanceLeaseLiability",
        "totalLabel": "Total Lease Liabilities, finance leases",
        "verboseLabel": "Total lease liabilities, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityCurrent": {
     "auth_ref": [
      "r594"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": 1.0,
       "parentTag": "us-gaap_FinanceLeaseLiability",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.",
        "label": "Short-term lease liabilities, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityNoncurrent": {
     "auth_ref": [
      "r594"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": 0.0,
       "parentTag": "us-gaap_FinanceLeaseLiability",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.",
        "label": "Long-term lease liabilities, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityPaymentsDue": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments for finance lease.",
        "label": "us-gaap_FinanceLeaseLiabilityPaymentsDue",
        "totalLabel": "Total future minimum lease payments, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityPaymentsDue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 4.0,
       "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2027 &amp; Beyond, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityPaymentsDueAfterYearFive",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 3.0,
       "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2022, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityPaymentsDueNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 5.0,
       "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2026, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityPaymentsDueYearFive",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 0.0,
       "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2025, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityPaymentsDueYearFour",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 1.0,
       "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2024, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityPaymentsDueYearThree",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 2.0,
       "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2023, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityPaymentsDueYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount": {
     "auth_ref": [
      "r609"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.",
        "label": "Less: Imputed interest, finance leases"
       }
      }
     },
     "localname": "FinanceLeaseLiabilityUndiscountedExcessAmount",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeasePrincipalPayments": {
     "auth_ref": [
      "r596",
      "r605"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow for principal payment on finance lease.",
        "label": "Financing cash flows from finance leases"
       }
      }
     },
     "localname": "FinanceLeasePrincipalPayments",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseRightOfUseAsset": {
     "auth_ref": [
      "r593"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after accumulated amortization, of right-of-use asset from finance lease.",
        "label": "Right-of-use Assets, finance leases",
        "terseLabel": "Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total"
       }
      }
     },
     "localname": "FinanceLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseRightOfUseAssetAmortization": {
     "auth_ref": [
      "r595",
      "r601",
      "r610"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details": {
       "order": 1.0,
       "parentTag": "hrth_FinanceLeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization expense attributable to right-of-use asset from finance lease.",
        "label": "Amortization of right-of-use assets"
       }
      }
     },
     "localname": "FinanceLeaseRightOfUseAssetAmortization",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent": {
     "auth_ref": [
      "r607",
      "r610"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average discount rate for finance lease calculated at point in time.",
        "label": "Weighted Average Discount Rate, Finance leases"
       }
      }
     },
     "localname": "FinanceLeaseWeightedAverageDiscountRatePercent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1": {
     "auth_ref": [
      "r606",
      "r610"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Weighted Average Remaining Lease term, Finance leases (Year)"
       }
      }
     },
     "localname": "FinanceLeaseWeightedAverageRemainingLeaseTerm1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_FixturesAndEquipmentGross": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 2.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accumulated depreciation of fixtures and equipment. Includes, but is not limited to, machinery, equipment, and engines.",
        "label": "Equipment and furniture"
       }
      }
     },
     "localname": "FixturesAndEquipmentGross",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ForeignCountryMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Designated tax departments of governments entitled to levy and collect income taxes from the entity outside the entity's country of domicile.",
        "label": "Foreign Tax Authority [Member]"
       }
      }
     },
     "localname": "ForeignCountryMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock": {
     "auth_ref": [
      "r588"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for (1) transactions denominated in a currency other than the reporting enterprise's functional currency, (2) translating foreign currency financial statements that are incorporated into the financial statements of the reporting enterprise by consolidation, combination, or the equity method of accounting, and (3) remeasurement of the financial statements of a foreign reporting enterprise in a hyperinflationary economy.",
        "label": "Foreign Currency Transactions and Translations Policy [Policy Text Block]"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FurnitureAndFixturesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.",
        "label": "Furniture and Fixtures [Member]"
       }
      }
     },
     "localname": "FurnitureAndFixturesMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GainsLossesOnExtinguishmentOfDebt": {
     "auth_ref": [
      "r106",
      "r322",
      "r323"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 2.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.",
        "label": "us-gaap_GainsLossesOnExtinguishmentOfDebt",
        "negatedLabel": "Gain from extinguishment of debt (Paycheck Protection Program Term Note)",
        "terseLabel": "Gain (Loss) on Extinguishment of Debt, Total"
       }
      }
     },
     "localname": "GainsLossesOnExtinguishmentOfDebt",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairmentOfLongLivedAssetsHeldForUse": {
     "auth_ref": [
      "r106",
      "r253",
      "r258"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).",
        "label": "us-gaap_ImpairmentOfLongLivedAssetsHeldForUse",
        "terseLabel": "Impairment, Long-Lived Asset, Held-for-Use, Total"
       }
      }
     },
     "localname": "ImpairmentOfLongLivedAssetsHeldForUse",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic": {
     "auth_ref": [
      "r123",
      "r547"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.",
        "label": "United States"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-loss-before-income-taxes-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": {
     "auth_ref": [
      "r79",
      "r200",
      "r211",
      "r214",
      "r217",
      "r220",
      "r649",
      "r657",
      "r663",
      "r681"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.",
        "label": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
        "totalLabel": "Income (loss) before income taxes",
        "verboseLabel": "Total income (loss) before income taxes"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-loss-before-income-taxes-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign": {
     "auth_ref": [
      "r123",
      "r547"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.",
        "label": "Foreign"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-loss-before-income-taxes-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxAuthorityAxis": {
     "auth_ref": [
      "r521"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by tax jurisdiction.",
        "label": "Income Tax Authority [Axis]"
       }
      }
     },
     "localname": "IncomeTaxAuthorityAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxAuthorityDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Agency, division or body classification that levies income taxes, examines tax returns for compliance, or grants exemptions from or makes other decisions pertaining to income taxes.",
        "label": "Income Tax Authority [Domain]"
       }
      }
     },
     "localname": "IncomeTaxAuthorityDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxDisclosureTextBlock": {
     "auth_ref": [
      "r124",
      "r520",
      "r523",
      "r530",
      "r542",
      "r549",
      "r552",
      "r553",
      "r554"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.",
        "label": "Income Tax Disclosure [Text Block]"
       }
      }
     },
     "localname": "IncomeTaxDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxEffectsAllocatedDirectlyToEquity": {
     "auth_ref": [
      "r518"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefitIntraperiodTaxAllocation",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The sum of the tax effects of all items occurring during the period that have been charged or credited directly to other comprehensive income or to related components of shareholders' equity.",
        "label": "us-gaap_IncomeTaxEffectsAllocatedDirectlyToEquity",
        "terseLabel": "Stockholders\u2019 deficit"
       }
      }
     },
     "localname": "IncomeTaxEffectsAllocatedDirectlyToEquity",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r125",
      "r143",
      "r144",
      "r198",
      "r518",
      "r543",
      "r550",
      "r682"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": -1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefitIntraperiodTaxAllocation",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Income tax expense (benefit)",
        "terseLabel": "Income (loss) from operations",
        "totalLabel": "Income tax expense (benefit) for the period"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefitIntraperiodTaxAllocation": {
     "auth_ref": [
      "r543",
      "r551"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income tax expense (benefit) for continuing operations, discontinued operations, other comprehensive income, and items charged (credited) directly to shareholders' equity.",
        "label": "us-gaap_IncomeTaxExpenseBenefitIntraperiodTaxAllocation",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefitIntraperiodTaxAllocation",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxPolicyTextBlock": {
     "auth_ref": [
      "r73",
      "r515",
      "r516",
      "r523",
      "r524",
      "r529",
      "r536"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.",
        "label": "Income Tax, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "IncomeTaxPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance": {
     "auth_ref": [
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.",
        "label": "Change in valuation allowance"
       }
      }
     },
     "localname": "IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate": {
     "auth_ref": [
      "r514",
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 4.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.",
        "label": "Change in Rate"
       }
      }
     },
     "localname": "IncomeTaxReconciliationChangeInEnactedTaxRate",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential": {
     "auth_ref": [
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).",
        "label": "Foreign tax rate differential"
       }
      }
     },
     "localname": "IncomeTaxReconciliationForeignIncomeTaxRateDifferential",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate": {
     "auth_ref": [
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 13.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.",
        "label": "Computed expected income tax expense (benefit)"
       }
      }
     },
     "localname": "IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationNondeductibleExpense": {
     "auth_ref": [
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 12.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.",
        "label": "Permanent Differences"
       }
      }
     },
     "localname": "IncomeTaxReconciliationNondeductibleExpense",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost": {
     "auth_ref": [
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 6.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.",
        "label": "Stock-based compensation shortfalls"
       }
      }
     },
     "localname": "IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationOtherAdjustments": {
     "auth_ref": [
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 8.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.",
        "label": "Other Adjustments, net"
       }
      }
     },
     "localname": "IncomeTaxReconciliationOtherAdjustments",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes": {
     "auth_ref": [
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 3.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).",
        "label": "Net effect of state income taxes"
       }
      }
     },
     "localname": "IncomeTaxReconciliationStateAndLocalIncomeTaxes",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationTaxCredits": {
     "auth_ref": [
      "r519"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details": {
       "order": 11.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.",
        "label": "us-gaap_IncomeTaxReconciliationTaxCredits",
        "negatedLabel": "Credits"
       }
      }
     },
     "localname": "IncomeTaxReconciliationTaxCredits",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxesPaidNet": {
     "auth_ref": [
      "r110"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.",
        "label": "Cash received for income taxes, net of payments"
       }
      }
     },
     "localname": "IncomeTaxesPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsPayable": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.",
        "label": "Decrease in accounts payable and accrued expense"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsPayable",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsReceivable": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.",
        "label": "us-gaap_IncreaseDecreaseInAccountsReceivable",
        "negatedLabel": "(Increase) decrease in accounts receivable, net and contract assets"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Changes in assets and liabilities, net of dispositions:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingCapitalAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherAccruedLiabilities": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in other expenses incurred but not yet paid.",
        "label": "Decrease in other accrued expenses and liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherAccruedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in prepaid expenses, and assets classified as other.",
        "label": "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets",
        "negatedLabel": "(Increase) decrease in prepaid expenses, income tax receivable and other current assets"
       }
      }
     },
     "localname": "IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseDebt": {
     "auth_ref": [
      "r91",
      "r312",
      "r317",
      "r320",
      "r321"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the cost of borrowed funds accounted for as interest expense for debt.",
        "label": "us-gaap_InterestExpenseDebt",
        "terseLabel": "Interest Expense, Debt, Total"
       }
      }
     },
     "localname": "InterestExpenseDebt",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestIncomeExpenseNet": {
     "auth_ref": [
      "r662"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The net amount of operating interest income (expense).",
        "label": "us-gaap_InterestIncomeExpenseNet",
        "negatedLabel": "Interest expense, net"
       }
      }
     },
     "localname": "InterestIncomeExpenseNet",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPaidNet": {
     "auth_ref": [
      "r100",
      "r103",
      "r110"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.",
        "label": "Cash paid for interest"
       }
      }
     },
     "localname": "InterestPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IntersegmentEliminationMember": {
     "auth_ref": [
      "r192",
      "r210",
      "r211",
      "r212",
      "r213",
      "r214",
      "r216",
      "r220"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Eliminating entries used in operating segment consolidation.",
        "label": "Intersegment Eliminations [Member]"
       }
      }
     },
     "localname": "IntersegmentEliminationMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentTypeAxis": {
     "auth_ref": [
      "r698",
      "r699",
      "r700",
      "r701",
      "r702",
      "r703",
      "r704",
      "r705",
      "r706",
      "r707",
      "r709",
      "r711",
      "r712",
      "r713",
      "r714"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of investments.",
        "label": "Investment Type [Axis]"
       }
      }
     },
     "localname": "InvestmentTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentTypeCategorizationMember": {
     "auth_ref": [
      "r698",
      "r699",
      "r700",
      "r701",
      "r702",
      "r703",
      "r704",
      "r705",
      "r706",
      "r707",
      "r709",
      "r711",
      "r712",
      "r713",
      "r714"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Asset obtained to generate income or appreciate in value.",
        "label": "Investments [Domain]"
       }
      }
     },
     "localname": "InvestmentTypeCategorizationMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LaborAndRelatedExpense": {
     "auth_ref": [
      "r86"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.",
        "label": "Labor"
       }
      }
     },
     "localname": "LaborAndRelatedExpense",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LeaseContractualTermAxis": {
     "auth_ref": [
      "r600"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by contractual term of lease arrangement.",
        "label": "Lease Contractual Term [Axis]"
       }
      }
     },
     "localname": "LeaseContractualTermAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LeaseContractualTermDomain": {
     "auth_ref": [
      "r600"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contractual term of lease arrangement.",
        "label": "Lease Contractual Term [Domain]"
       }
      }
     },
     "localname": "LeaseContractualTermDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LeaseCost": {
     "auth_ref": [
      "r608",
      "r610"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lease cost recognized by lessee for lease contract.",
        "label": "us-gaap_LeaseCost",
        "totalLabel": "Total lease cost, net"
       }
      }
     },
     "localname": "LeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LeaseCostTableTextBlock": {
     "auth_ref": [
      "r608"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.",
        "label": "Lease, Cost [Table Text Block]"
       }
      }
     },
     "localname": "LeaseCostTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LesseeLeasesPolicyTextBlock": {
     "auth_ref": [
      "r599"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for leasing arrangement entered into by lessee.",
        "label": "Lessee, Leases [Policy Text Block]"
       }
      }
     },
     "localname": "LesseeLeasesPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease.",
        "label": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
        "totalLabel": "Total future minimum lease payments, operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 5.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2027 &amp; Beyond, operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 4.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2022, operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 0.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2026, operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 1.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2025, operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 2.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2024, operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": {
     "auth_ref": [
      "r609"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details": {
       "order": 3.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "2023, operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": {
     "auth_ref": [
      "r609"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.",
        "label": "Less: Imputed interest, operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths": {
     "auth_ref": [
      "r611"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lease payment to be received by lessor for operating lease in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths",
        "terseLabel": "Lessor, Operating Lease, Payment to be Received, Year One"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears": {
     "auth_ref": [
      "r611"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lease payment to be received by lessor for operating lease in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears",
        "terseLabel": "Lessor, Operating Lease, Payment to be Received, Year Two"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceivedTwoYears",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LettersOfCreditOutstandingAmount": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.",
        "label": "us-gaap_LettersOfCreditOutstandingAmount",
        "terseLabel": "Letters of Credit Outstanding, Amount"
       }
      }
     },
     "localname": "LettersOfCreditOutstandingAmount",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r47",
      "r121",
      "r213",
      "r237",
      "r283",
      "r284",
      "r285",
      "r288",
      "r289",
      "r290",
      "r292",
      "r294",
      "r296",
      "r297",
      "r559",
      "r563",
      "r564",
      "r576",
      "r620",
      "r621"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.",
        "label": "us-gaap_Liabilities",
        "totalLabel": "Total liabilities"
       }
      }
     },
     "localname": "Liabilities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r35",
      "r121",
      "r237",
      "r576",
      "r622",
      "r656",
      "r675"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.",
        "label": "us-gaap_LiabilitiesAndStockholdersEquity",
        "totalLabel": "Total liabilities, preferred stock and stockholders\u2019 deficit"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesCurrent": {
     "auth_ref": [
      "r49",
      "r121",
      "r237",
      "r283",
      "r284",
      "r285",
      "r288",
      "r289",
      "r290",
      "r292",
      "r294",
      "r296",
      "r297",
      "r559",
      "r563",
      "r564",
      "r576",
      "r620",
      "r621",
      "r622"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 3.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.",
        "label": "us-gaap_LiabilitiesCurrent",
        "totalLabel": "Total current liabilities"
       }
      }
     },
     "localname": "LiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesCurrentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Current liabilities"
       }
      }
     },
     "localname": "LiabilitiesCurrentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCredit": {
     "auth_ref": [
      "r21",
      "r655",
      "r667"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.",
        "label": "us-gaap_LineOfCredit",
        "terseLabel": "Long-term Line of Credit, Total"
       }
      }
     },
     "localname": "LineOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityAxis": {
     "auth_ref": [
      "r45",
      "r120"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by name of lender, which may be a single entity (for example, but not limited to, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit.",
        "label": "Lender Name [Axis]"
       }
      }
     },
     "localname": "LineOfCreditFacilityAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditFacilityLenderDomain": {
     "auth_ref": [
      "r45",
      "r120"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identification of the lender, which may be a single entity (for example, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit, including a letter of credit facility.",
        "label": "Line of Credit Facility, Lender [Domain]"
       }
      }
     },
     "localname": "LineOfCreditFacilityLenderDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity": {
     "auth_ref": [
      "r45"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.",
        "label": "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity",
        "terseLabel": "Line of Credit Facility, Maximum Borrowing Capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityMaximumBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity": {
     "auth_ref": [
      "r45"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).",
        "label": "us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity",
        "terseLabel": "Line of Credit Facility, Remaining Borrowing Capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityRemainingBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.",
        "label": "us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage",
        "terseLabel": "Line of Credit Facility, Unused Capacity, Commitment Fee Percentage"
       }
      }
     },
     "localname": "LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LitigationReserve": {
     "auth_ref": [
      "r53",
      "r279"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.",
        "label": "us-gaap_LitigationReserve",
        "terseLabel": "Estimated Litigation Liability"
       }
      }
     },
     "localname": "LitigationReserve",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LondonInterbankOfferedRateLIBORMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate at which a bank borrows funds from other banks in the London interbank market.",
        "label": "London Interbank Offered Rate (LIBOR) [Member]"
       }
      }
     },
     "localname": "LondonInterbankOfferedRateLIBORMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LongTermDebt": {
     "auth_ref": [
      "r21",
      "r306",
      "r315",
      "r318",
      "r319",
      "r655",
      "r671"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.",
        "label": "Total debt"
       }
      }
     },
     "localname": "LongTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtCurrent": {
     "auth_ref": [
      "r46"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.",
        "label": "Short-term debt",
        "negatedTerseLabel": "Less: current portion of long-term debt"
       }
      }
     },
     "localname": "LongTermDebtCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtNoncurrent": {
     "auth_ref": [
      "r51"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 2.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.",
        "label": "Long-term debt, net of current portion",
        "terseLabel": "Long-term debt"
       }
      }
     },
     "localname": "LongTermDebtNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtTextBlock": {
     "auth_ref": [
      "r324"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for long-term debt.",
        "label": "Long-term Debt [Text Block]"
       }
      }
     },
     "localname": "LongTermDebtTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r102"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.",
        "label": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
        "totalLabel": "Net cash (used in) provided by financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cash Flows from Financing Activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r102"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 0.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.",
        "label": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
        "totalLabel": "Net cash used in investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cash Flows from Investing Activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r102",
      "r104",
      "r107"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 3.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.",
        "label": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
        "totalLabel": "Net cash used in operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cash Flows from Operating Activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r3",
      "r67",
      "r70",
      "r76",
      "r80",
      "r107",
      "r121",
      "r133",
      "r137",
      "r138",
      "r139",
      "r140",
      "r143",
      "r144",
      "r158",
      "r200",
      "r211",
      "r214",
      "r217",
      "r220",
      "r237",
      "r283",
      "r284",
      "r285",
      "r288",
      "r289",
      "r290",
      "r292",
      "r294",
      "r296",
      "r297",
      "r570",
      "r576",
      "r658",
      "r677"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic",
       "weight": 1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.",
        "label": "Net income (loss)",
        "terseLabel": "Net income (loss)",
        "totalLabel": "Net income (loss)"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic": {
     "auth_ref": [
      "r137",
      "r138",
      "r139",
      "r140",
      "r148",
      "r149",
      "r160",
      "r165",
      "r200",
      "r211",
      "r214",
      "r217",
      "r220"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.",
        "label": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic",
        "totalLabel": "Income (loss) attributable to common stockholders"
       }
      }
     },
     "localname": "NetIncomeLossAvailableToCommonStockholdersBasic",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted": {
     "auth_ref": [
      "r150",
      "r153",
      "r154",
      "r155",
      "r156",
      "r160",
      "r165"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.",
        "label": "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted",
        "totalLabel": "Numerator for diluted EPS"
       }
      }
     },
     "localname": "NetIncomeLossAvailableToCommonStockholdersDiluted",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock": {
     "auth_ref": [
      "r1",
      "r131",
      "r132",
      "r135",
      "r136",
      "r145",
      "r146",
      "r147",
      "r234",
      "r235",
      "r239",
      "r240",
      "r363",
      "r364",
      "r365",
      "r366",
      "r507",
      "r539",
      "r540",
      "r541",
      "r567",
      "r577",
      "r578",
      "r579",
      "r612",
      "r634",
      "r635",
      "r636",
      "r691",
      "r692",
      "r693",
      "r694",
      "r695",
      "r743"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.",
        "label": "Accounting Standards Update and Change in Accounting Principle [Text Block]"
       }
      }
     },
     "localname": "NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-b-recent-accounting-pronouncements"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NonUsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Countries excluding the United States of America (US).",
        "label": "Non-US [Member]"
       }
      }
     },
     "localname": "NonUsMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NoncashInvestingAndFinancingItemsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Non-cash investing and financing activities"
       }
      }
     },
     "localname": "NoncashInvestingAndFinancingItemsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NonoperatingIncomeExpense": {
     "auth_ref": [
      "r90"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).",
        "label": "us-gaap_NonoperatingIncomeExpense",
        "negatedTotalLabel": "Total other (income) expense, net"
       }
      }
     },
     "localname": "NonoperatingIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NonoperatingIncomeExpenseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other (income) expense, net"
       }
      }
     },
     "localname": "NonoperatingIncomeExpenseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NonqualifiedPlanMember": {
     "auth_ref": [
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r419",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r432",
      "r433",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan without tax-exempt status in accordance with applicable tax provision of designated taxing authority. Taxing authority includes, but is not limited to, U.S. Internal Revenue Service (IRS). Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Nonqualified Plan [Member]"
       }
      }
     },
     "localname": "NonqualifiedPlanMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NotesPayable": {
     "auth_ref": [
      "r21",
      "r655",
      "r671"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.",
        "label": "us-gaap_NotesPayable",
        "terseLabel": "Notes Payable, Total"
       }
      }
     },
     "localname": "NotesPayable",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NumberOfOperatingSegments": {
     "auth_ref": [
      "r188"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.",
        "label": "us-gaap_NumberOfOperatingSegments",
        "terseLabel": "Number of Operating Segments"
       }
      }
     },
     "localname": "NumberOfOperatingSegments",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-details-textual"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_NumberOfReportableSegments": {
     "auth_ref": [
      "r188"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.",
        "label": "us-gaap_NumberOfReportableSegments",
        "terseLabel": "Number of Reportable Segments"
       }
      }
     },
     "localname": "NumberOfReportableSegments",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent": {
     "auth_ref": [
      "r64",
      "r77"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.",
        "label": "Other comprehensive income, net of tax, before reclassifications"
       }
      }
     },
     "localname": "OciBeforeReclassificationsNetOfTaxAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OpenTaxYear": {
     "auth_ref": [
      "r521"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tax year that remains open to examination under enacted tax laws, in YYYY format.",
        "label": "us-gaap_OpenTaxYear",
        "terseLabel": "Open Tax Year"
       }
      }
     },
     "localname": "OpenTaxYear",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "gYearListItemType"
    },
    "us-gaap_OperatingExpenses": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details": {
       "order": 2.0,
       "parentTag": "hrth_ContributionMargin",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.",
        "label": "Segment operating expense"
       }
      }
     },
     "localname": "OperatingExpenses",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Operating expenses"
       }
      }
     },
     "localname": "OperatingExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OperatingIncomeLoss": {
     "auth_ref": [
      "r200",
      "r211",
      "r214",
      "r217",
      "r220"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The net result for the period of deducting operating expenses from operating revenues.",
        "label": "us-gaap_OperatingIncomeLoss",
        "totalLabel": "Operating income (loss)"
       }
      }
     },
     "localname": "OperatingIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseCost": {
     "auth_ref": [
      "r602",
      "r610"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details": {
       "order": 3.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.",
        "label": "Operating lease cost"
       }
      }
     },
     "localname": "OperatingLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiability": {
     "auth_ref": [
      "r594"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.",
        "label": "us-gaap_OperatingLeaseLiability",
        "totalLabel": "Total Lease Liabilities, operating leases",
        "verboseLabel": "Total lease liabilities, operating leases"
       }
      }
     },
     "localname": "OperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilityCurrent": {
     "auth_ref": [
      "r594"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingLeaseLiability",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.",
        "label": "Short-term lease liabilities, operating leases"
       }
      }
     },
     "localname": "OperatingLeaseLiabilityCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilityNoncurrent": {
     "auth_ref": [
      "r594"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details": {
       "order": 0.0,
       "parentTag": "us-gaap_OperatingLeaseLiability",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.",
        "label": "Long-term lease liabilities, operating leases"
       }
      }
     },
     "localname": "OperatingLeaseLiabilityNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeasePayments": {
     "auth_ref": [
      "r598",
      "r605"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.",
        "label": "Operating cash flows from operating leases"
       }
      }
     },
     "localname": "OperatingLeasePayments",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseRightOfUseAsset": {
     "auth_ref": [
      "r593"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's right to use underlying asset under operating lease.",
        "label": "Right-of-use Assets, operating leases",
        "terseLabel": "Operating Lease, Right-of-Use Asset"
       }
      }
     },
     "localname": "OperatingLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": {
     "auth_ref": [
      "r607",
      "r610"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average discount rate for operating lease calculated at point in time.",
        "label": "Weighted Average Discount Rate, Operating leases"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageDiscountRatePercent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": {
     "auth_ref": [
      "r606",
      "r610"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Weighted Average Remaining Lease term, Operating leases (Year)"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_OperatingLossCarryforwards": {
     "auth_ref": [
      "r531"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.",
        "label": "us-gaap_OperatingLossCarryforwards",
        "terseLabel": "Operating Loss Carryforwards, Total"
       }
      }
     },
     "localname": "OperatingLossCarryforwards",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingSegmentsMember": {
     "auth_ref": [
      "r210",
      "r211",
      "r212",
      "r213",
      "r214",
      "r220"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identifies components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Operating Segments [Member]"
       }
      }
     },
     "localname": "OperatingSegmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherAssetsCurrent": {
     "auth_ref": [
      "r56",
      "r622"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 1.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current assets classified as other.",
        "label": "Other current assets"
       }
      }
     },
     "localname": "OtherAssetsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherAssetsNoncurrent": {
     "auth_ref": [
      "r43"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 1.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of noncurrent assets classified as other.",
        "label": "Other assets"
       }
      }
     },
     "localname": "OtherAssetsNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent": {
     "auth_ref": [
      "r556",
      "r557",
      "r561"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.",
        "label": "Foreign currency translation adjustments"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent": {
     "auth_ref": [
      "r68",
      "r71",
      "r556",
      "r557",
      "r561"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of other comprehensive income (loss) attributable to parent entity.",
        "label": "Other comprehensive loss",
        "totalLabel": "Total other comprehensive income (loss), net of tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax": {
     "auth_ref": [
      "r60",
      "r62",
      "r415",
      "r446"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.",
        "label": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax",
        "terseLabel": "Net (income) loss"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax": {
     "auth_ref": [
      "r62",
      "r65",
      "r66",
      "r415"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net periodic benefit cost (credit) of defined benefit plan.",
        "label": "Adjustment to pension liability"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilitiesCurrent": {
     "auth_ref": [
      "r11",
      "r12",
      "r48",
      "r622"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 5.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.",
        "label": "Other current liabilities"
       }
      }
     },
     "localname": "OtherLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilitiesNoncurrent": {
     "auth_ref": [
      "r52"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 4.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.",
        "label": "Other long-term liabilities"
       }
      }
     },
     "localname": "OtherLiabilitiesNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherNonoperatingIncomeExpense": {
     "auth_ref": [
      "r92"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.",
        "label": "us-gaap_OtherNonoperatingIncomeExpense",
        "negatedLabel": "Other, net"
       }
      }
     },
     "localname": "OtherNonoperatingIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherPensionPlansDefinedBenefitMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan designed to provide retirement benefits, classified as other. Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Other Pension Plan [Member]"
       }
      }
     },
     "localname": "OtherPensionPlansDefinedBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherThanSecuritiesInvestmentMember": {
     "auth_ref": [
      "r708",
      "r710"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "When the investment holdings table includes investments other than securities, this member categorizes all non-security investments to segregate them from security investments.",
        "label": "Other than Securities Investment [Member]"
       }
      }
     },
     "localname": "OtherThanSecuritiesInvestmentMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PaymentsForRestructuring": {
     "auth_ref": [
      "r101",
      "r263"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.",
        "label": "us-gaap_PaymentsForRestructuring",
        "negatedLabel": "Payments"
       }
      }
     },
     "localname": "PaymentsForRestructuring",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDebtRestructuringCosts": {
     "auth_ref": [
      "r99"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for cost incurred in the modification of term of existing debt agreement in order for the entity to achieve some advantage.",
        "label": "us-gaap_PaymentsOfDebtRestructuringCosts",
        "negatedLabel": "Debt financing costs"
       }
      }
     },
     "localname": "PaymentsOfDebtRestructuringCosts",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfStockIssuanceCosts": {
     "auth_ref": [
      "r99"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for cost incurred directly with the issuance of an equity security.",
        "label": "us-gaap_PaymentsOfStockIssuanceCosts",
        "terseLabel": "Payments of Stock Issuance Costs"
       }
      }
     },
     "localname": "PaymentsOfStockIssuanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": {
     "auth_ref": [
      "r95"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.",
        "label": "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment",
        "negatedLabel": "Purchases of property, plant and equipment"
       }
      }
     },
     "localname": "PaymentsToAcquirePropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": {
     "auth_ref": [
      "r395",
      "r397",
      "r403",
      "r422",
      "r424",
      "r425",
      "r426",
      "r427",
      "r428",
      "r446",
      "r448",
      "r449",
      "r451",
      "r471"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for retirement benefits.",
        "label": "Retirement Benefits [Text Block]"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities": {
     "auth_ref": [
      "r20",
      "r370",
      "r371",
      "r393",
      "r446"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.",
        "label": "Current pension liabilities"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent": {
     "auth_ref": [
      "r371",
      "r393",
      "r654",
      "r670"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans.",
        "label": "Total pension liabilities"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent": {
     "auth_ref": [
      "r22",
      "r370",
      "r371",
      "r393",
      "r446"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 1.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.",
        "label": "Pension liabilities",
        "terseLabel": "Long term pension liabilities"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionExpenseReversalOfExpenseNoncash": {
     "auth_ref": [
      "r106"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of noncash expense (reversal of expense) for pension benefits. Excludes other postretirement benefits.",
        "label": "Net pension (payment) cost"
       }
      }
     },
     "localname": "PensionExpenseReversalOfExpenseNoncash",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionPlansDefinedBenefitMember": {
     "auth_ref": [
      "r368",
      "r370",
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445",
      "r446",
      "r447",
      "r451",
      "r452",
      "r466",
      "r467",
      "r468",
      "r469"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan designed to provide participant with pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes other postretirement benefits.",
        "label": "Pension Plan [Member]"
       }
      }
     },
     "localname": "PensionPlansDefinedBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PerformanceSharesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share-based payment arrangement awarded for meeting performance target.",
        "label": "Performance Shares [Member]"
       }
      }
     },
     "localname": "PerformanceSharesMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PhantomShareUnitsPSUsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share-based payment arrangement awarded as phantom share or unit.",
        "label": "Phantom Share Units (PSUs) [Member]"
       }
      }
     },
     "localname": "PhantomShareUnitsPSUsMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PlanAssetCategoriesDomain": {
     "auth_ref": [
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r423",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined benefit plan asset investment.",
        "label": "Defined Benefit Plan, Plan Assets, Category [Domain]"
       }
      }
     },
     "localname": "PlanAssetCategoriesDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PlanNameAxis": {
     "auth_ref": [
      "r475",
      "r503"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by plan name for share-based payment arrangement.",
        "label": "Plan Name [Axis]"
       }
      }
     },
     "localname": "PlanNameAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PlanNameDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan name for share-based payment arrangement.",
        "label": "Plan Name [Domain]"
       }
      }
     },
     "localname": "PlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PolicyTextBlockAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "us-gaap_PolicyTextBlockAbstract",
        "terseLabel": "Accounting Policies"
       }
      }
     },
     "localname": "PolicyTextBlockAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PreferredStockConvertibleConversionRatio": {
     "auth_ref": [
      "r328"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of common shares issuable upon conversion for each share of preferred stock to be converted.",
        "label": "us-gaap_PreferredStockConvertibleConversionRatio",
        "terseLabel": "Preferred Stock, Convertible, Conversion Ratio (Rate)"
       }
      }
     },
     "localname": "PreferredStockConvertibleConversionRatio",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "pureItemType"
    },
    "us-gaap_PreferredStockDividendRatePercentage": {
     "auth_ref": [
      "r327"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The percentage rate used to calculate dividend payments on preferred stock.",
        "label": "us-gaap_PreferredStockDividendRatePercentage",
        "terseLabel": "Preferred Stock, Dividend Rate, Percentage"
       }
      }
     },
     "localname": "PreferredStockDividendRatePercentage",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_PreferredStockDividendsIncomeStatementImpact": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic",
       "weight": -1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders.",
        "label": "Less: Preferred stock dividends"
       }
      }
     },
     "localname": "PreferredStockDividendsIncomeStatementImpact",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PreferredStockMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Preferred shares may provide a preferential dividend to the dividend on common stock and may take precedence over common stock in the event of a liquidation. Preferred shares typically represent an ownership interest in the company.",
        "label": "Preferred Stock [Member]"
       }
      }
     },
     "localname": "PreferredStockMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PreferredStockSharesAuthorized": {
     "auth_ref": [
      "r27"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.",
        "label": "Preferred stock, shares authorized (in shares)",
        "terseLabel": "Preferred Stock, Shares Authorized (in shares)"
       }
      }
     },
     "localname": "PreferredStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockTextBlock": {
     "auth_ref": [
      "r342"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock.",
        "label": "Preferred Stock [Text Block]"
       }
      }
     },
     "localname": "PreferredStockTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PrepaidExpenseCurrent": {
     "auth_ref": [
      "r6",
      "r8",
      "r246",
      "r247"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 3.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.",
        "label": "Prepaid expenses"
       }
      }
     },
     "localname": "PrepaidExpenseCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PrimeRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate charged by financial institutions to their most creditworthy borrowers.",
        "label": "Prime Rate [Member]"
       }
      }
     },
     "localname": "PrimeRateMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ProceedsFromIncomeTaxRefunds": {
     "auth_ref": [
      "r104",
      "r110"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of cash received during the period as refunds for the overpayment of taxes.",
        "label": "us-gaap_ProceedsFromIncomeTaxRefunds",
        "terseLabel": "Proceeds from Income Tax Refunds"
       }
      }
     },
     "localname": "ProceedsFromIncomeTaxRefunds",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfDebt": {
     "auth_ref": [
      "r97"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.",
        "label": "Borrowings"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfDebt",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock": {
     "auth_ref": [
      "r96"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation.",
        "label": "us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock",
        "terseLabel": "Proceeds from Issuance of Preferred Stock and Preference Stock"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfPreferredStockAndPreferenceStock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromNotesPayable": {
     "auth_ref": [
      "r97"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from a borrowing supported by a written promise to pay an obligation.",
        "label": "us-gaap_ProceedsFromNotesPayable",
        "terseLabel": "Proceeds from Notes Payable, Total"
       }
      }
     },
     "localname": "ProceedsFromNotesPayable",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment": {
     "auth_ref": [
      "r94"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.",
        "label": "Proceeds from the sale of property, plant and equipment"
       }
      }
     },
     "localname": "ProceedsFromSaleOfPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProductionAndDistributionCosts": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 4.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense related to the production and distribution of goods or services to customers and clients.",
        "label": "Production and distribution"
       }
      }
     },
     "localname": "ProductionAndDistributionCosts",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Property, plant and equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentByTypeAxis": {
     "auth_ref": [
      "r41",
      "r257"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.",
        "label": "Long-Lived Tangible Asset [Axis]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentGross": {
     "auth_ref": [
      "r40",
      "r255"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 1.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "us-gaap_PropertyPlantAndEquipmentGross",
        "totalLabel": "Gross property, plant and equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentGross",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentNet": {
     "auth_ref": [
      "r16",
      "r17",
      "r257",
      "r622",
      "r664",
      "r676"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 0.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "us-gaap_PropertyPlantAndEquipmentNet",
        "terseLabel": "Property, plant and equipment",
        "totalLabel": "Net property, plant and equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentNet",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentPolicyTextBlock": {
     "auth_ref": [
      "r39",
      "r257",
      "r718",
      "r719"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.",
        "label": "Property, Plant and Equipment, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTextBlock": {
     "auth_ref": [
      "r16",
      "r257"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.",
        "label": "Property, Plant and Equipment [Table Text Block]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTypeDomain": {
     "auth_ref": [
      "r16",
      "r255"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.",
        "label": "Long-Lived Tangible Asset [Domain]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentUsefulLife": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.",
        "label": "Estimated useful lives (Year)",
        "terseLabel": "Property, Plant and Equipment, Useful Life (Year)"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentUsefulLife",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_ProvisionForDoubtfulAccounts": {
     "auth_ref": [
      "r84",
      "r243"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense (reversal of expense) for expected credit loss on accounts receivable.",
        "label": "Net charges to expense"
       }
      }
     },
     "localname": "ProvisionForDoubtfulAccounts",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_QualifiedPlanMember": {
     "auth_ref": [
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r419",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r432",
      "r433",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan with tax-exempt status designed and operated in accordance with applicable tax provision of designated taxing authority. Taxing authority includes, but is not limited to, U.S. Internal Revenue Service (IRS). Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Qualified Plan [Member]"
       }
      }
     },
     "localname": "QualifiedPlanMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ReceivablesTradeAndOtherAccountsReceivableAllowanceForDoubtfulAccountsPolicy": {
     "auth_ref": [
      "r37",
      "r232"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for determining the allowance for doubtful accounts for trade and other accounts receivable balances, and when impairments, charge-offs or recoveries are recognized.",
        "label": "Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "ReceivablesTradeAndOtherAccountsReceivableAllowanceForDoubtfulAccountsPolicy",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent": {
     "auth_ref": [
      "r64",
      "r77"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details": {
       "order": 0.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.",
        "label": "us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent",
        "negatedLabel": "Amounts reclassified from accumulated other comprehensive loss, net of tax"
       }
      }
     },
     "localname": "ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock": {
     "auth_ref": [
      "r211",
      "r214"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the reconciliation of profit (loss) from reportable segments to the consolidated income (loss) before income tax expense (benefit) and discontinued operations. Includes, but is not limited to, reconciliation after income tax if income tax is allocated to the reportable segment.",
        "label": "Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]"
       }
      }
     },
     "localname": "ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RelatedPartyDomain": {
     "auth_ref": [
      "r423",
      "r615",
      "r616"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related parties include affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.",
        "label": "Related Party [Domain]"
       }
      }
     },
     "localname": "RelatedPartyDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RelatedPartyTransactionsByRelatedPartyAxis": {
     "auth_ref": [
      "r423",
      "r615",
      "r617",
      "r637",
      "r638",
      "r639",
      "r640",
      "r641",
      "r642",
      "r643",
      "r644",
      "r645",
      "r646",
      "r647",
      "r648"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.",
        "label": "Related Party [Axis]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsByRelatedPartyAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionsDisclosureTextBlock": {
     "auth_ref": [
      "r613",
      "r614",
      "r616",
      "r618",
      "r619"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.",
        "label": "Related Party Transactions Disclosure [Text Block]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-m-certain-relationships-and-related-party-transactions"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RepaymentsOfDebt": {
     "auth_ref": [
      "r98"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.",
        "label": "us-gaap_RepaymentsOfDebt",
        "negatedLabel": "Repayment of borrowings"
       }
      }
     },
     "localname": "RepaymentsOfDebt",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepaymentsOfLongTermLinesOfCredit": {
     "auth_ref": [
      "r98"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.",
        "label": "us-gaap_RepaymentsOfLongTermLinesOfCredit",
        "terseLabel": "Repayments of Long-term Lines of Credit"
       }
      }
     },
     "localname": "RepaymentsOfLongTermLinesOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ResearchDevelopmentAndComputerSoftwarePolicyTextBlock": {
     "auth_ref": [
      "r42",
      "r251",
      "r252",
      "r731"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for its research and development and computer software activities including the accounting treatment for costs incurred for (1) research and development activities, (2) development of computer software for internal use, (3) computer software to be sold, leased or otherwise marketed as a separate product or as part of a product or process and (4) in-process research and development acquired in a purchase business combination.",
        "label": "Research, Development, and Computer Software, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "ResearchDevelopmentAndComputerSoftwarePolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RestrictedCash": {
     "auth_ref": [
      "r114",
      "r650",
      "r672"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 7.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.",
        "label": "Restricted cash"
       }
      }
     },
     "localname": "RestrictedCash",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestrictedStockUnitsRSUMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met.",
        "label": "Restricted Stock Units (RSUs) [Member]"
       }
      }
     },
     "localname": "RestrictedStockUnitsRSUMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock": {
     "auth_ref": [
      "r261",
      "r263",
      "r265",
      "r274",
      "r275"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.",
        "label": "Restructuring and Related Activities Disclosure [Text Block]"
       }
      }
     },
     "localname": "RestructuringAndRelatedActivitiesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RestructuringAndRelatedCostExpectedCost1": {
     "auth_ref": [
      "r262",
      "r264",
      "r271",
      "r273"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount expected to be recognized in earnings for the specified restructuring cost.",
        "label": "us-gaap_RestructuringAndRelatedCostExpectedCost1",
        "terseLabel": "Restructuring and Related Cost, Expected Cost, Total"
       }
      }
     },
     "localname": "RestructuringAndRelatedCostExpectedCost1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestructuringCharges": {
     "auth_ref": [
      "r106",
      "r260",
      "r268",
      "r271"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 2.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details": {
       "order": 1.0,
       "parentTag": "hrth_ContributionMargin",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.",
        "label": "Restructuring expense",
        "terseLabel": "Restructuring Charges, Total"
       }
      }
     },
     "localname": "RestructuringCharges",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestructuringCostAndReserveAxis": {
     "auth_ref": [
      "r262",
      "r263",
      "r271",
      "r272"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of restructuring cost.",
        "label": "Restructuring Type [Axis]"
       }
      }
     },
     "localname": "RestructuringCostAndReserveAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RestructuringCosts": {
     "auth_ref": [
      "r106"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.",
        "label": "Restructuring"
       }
      }
     },
     "localname": "RestructuringCosts",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestructuringReserve": {
     "auth_ref": [
      "r263",
      "r269"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.",
        "label": "us-gaap_RestructuringReserve",
        "periodEndLabel": "Ending balance:",
        "periodStartLabel": "Beginning balance:"
       }
      }
     },
     "localname": "RestructuringReserve",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestructuringReserveAccrualAdjustment1": {
     "auth_ref": [
      "r263",
      "r272"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.",
        "label": "us-gaap_RestructuringReserveAccrualAdjustment1",
        "verboseLabel": "Additions"
       }
      }
     },
     "localname": "RestructuringReserveAccrualAdjustment1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r31",
      "r339",
      "r508",
      "r622",
      "r674",
      "r691",
      "r695"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained earnings"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [
      "r0",
      "r128",
      "r129",
      "r130",
      "r134",
      "r142",
      "r144",
      "r238",
      "r504",
      "r505",
      "r506",
      "r537",
      "r538",
      "r568",
      "r688",
      "r690"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetirementPlanNameAxis": {
     "auth_ref": [
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r419",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r432",
      "r433",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445",
      "r457",
      "r458",
      "r459",
      "r460",
      "r461",
      "r462",
      "r463",
      "r464",
      "r465",
      "r470"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.",
        "label": "Retirement Plan Name [Axis]"
       }
      }
     },
     "localname": "RetirementPlanNameAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RetirementPlanNameDomain": {
     "auth_ref": [
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r419",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r432",
      "r433",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445",
      "r457",
      "r458",
      "r459",
      "r460",
      "r461",
      "r462",
      "r463",
      "r464",
      "r465",
      "r470"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.",
        "label": "Retirement Plan Name [Domain]"
       }
      }
     },
     "localname": "RetirementPlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetirementPlanTaxStatusAxis": {
     "auth_ref": [
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r419",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r432",
      "r433",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by tax status of plan designed to provide retirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Retirement Plan Tax Status [Axis]"
       }
      }
     },
     "localname": "RetirementPlanTaxStatusAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RetirementPlanTaxStatusDomain": {
     "auth_ref": [
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r419",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r432",
      "r433",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tax status of plan designed to provide retirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Retirement Plan Tax Status [Domain]"
       }
      }
     },
     "localname": "RetirementPlanTaxStatusDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetirementPlanTypeAxis": {
     "auth_ref": [
      "r368",
      "r369",
      "r370",
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445",
      "r446",
      "r447",
      "r451",
      "r452",
      "r453",
      "r454",
      "r455",
      "r456",
      "r466",
      "r467",
      "r468",
      "r469"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of retirement benefit plan. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.",
        "label": "Retirement Plan Type [Axis]"
       }
      }
     },
     "localname": "RetirementPlanTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RetirementPlanTypeDomain": {
     "auth_ref": [
      "r368",
      "r369",
      "r370",
      "r373",
      "r374",
      "r375",
      "r376",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r391",
      "r392",
      "r393",
      "r395",
      "r396",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r418",
      "r420",
      "r421",
      "r423",
      "r426",
      "r431",
      "r436",
      "r437",
      "r438",
      "r439",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445",
      "r446",
      "r447",
      "r451",
      "r452",
      "r453",
      "r454",
      "r455",
      "r456",
      "r466",
      "r467",
      "r468",
      "r469"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Type of plan designed to provide participants with retirement benefits. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.",
        "label": "Retirement Plan Type [Domain]"
       }
      }
     },
     "localname": "RetirementPlanTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": {
     "auth_ref": [
      "r191",
      "r192",
      "r210",
      "r215",
      "r216",
      "r223",
      "r224",
      "r227",
      "r355",
      "r356",
      "r633"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.",
        "label": "Operating revenue",
        "terseLabel": "Revenue"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerExcludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerTextBlock": {
     "auth_ref": [
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r353",
      "r354",
      "r359",
      "r367"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.",
        "label": "Revenue from Contract with Customer [Text Block]"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RevenueRecognitionPolicyTextBlock": {
     "auth_ref": [
      "r117",
      "r118"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for revenue. Includes revenue from contract with customer and from other sources.",
        "label": "Revenue [Policy Text Block]"
       }
      }
     },
     "localname": "RevenueRecognitionPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RevenueRemainingPerformanceObligation": {
     "auth_ref": [
      "r352"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of transaction price allocated to performance obligation that has not been recognized as revenue.",
        "label": "us-gaap_RevenueRemainingPerformanceObligation",
        "terseLabel": "Revenue, Remaining Performance Obligation, Amount"
       }
      }
     },
     "localname": "RevenueRemainingPerformanceObligation",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Revenues": {
     "auth_ref": [
      "r78",
      "r121",
      "r191",
      "r192",
      "r210",
      "r215",
      "r216",
      "r223",
      "r224",
      "r227",
      "r237",
      "r283",
      "r284",
      "r285",
      "r288",
      "r289",
      "r290",
      "r292",
      "r294",
      "r296",
      "r297",
      "r576",
      "r663"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details": {
       "order": 0.0,
       "parentTag": "hrth_ContributionMargin",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).",
        "label": "Revenues"
       }
      }
     },
     "localname": "Revenues",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevolvingCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount.",
        "label": "Revolving Credit Facility [Member]"
       }
      }
     },
     "localname": "RevolvingCreditFacilityMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SalesRevenueNetMember": {
     "auth_ref": [
      "r182",
      "r227"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Revenue from sale of product and rendering of service and other sources of income, when it serves as benchmark in concentration of risk calculation.",
        "label": "Revenue Benchmark [Member]"
       }
      }
     },
     "localname": "SalesRevenueNetMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock": {
     "auth_ref": [
      "r432",
      "r433",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of benefit obligation and plan assets of defined benefit plan with accumulated benefit obligation in excess of plan assets.",
        "label": "Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": {
     "auth_ref": [
      "r64",
      "r586",
      "r587"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of accumulated other comprehensive income (loss).",
        "label": "Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock": {
     "auth_ref": [
      "r394"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans.  This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall.",
        "label": "Schedule of Allocation of Plan Assets [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAllocationOfPlanAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock": {
     "auth_ref": [
      "r393"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized.",
        "label": "Schedule of Amounts Recognized in Balance Sheet [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAssumptionsUsedTableTextBlock": {
     "auth_ref": [
      "r417"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate.",
        "label": "Defined Benefit Plan, Assumptions [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAssumptionsUsedTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock": {
     "auth_ref": [
      "r536"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.",
        "label": "Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDebtInstrumentsTextBlock": {
     "auth_ref": [
      "r51",
      "r126",
      "r318",
      "r320",
      "r334",
      "r336",
      "r337",
      "r338",
      "r589",
      "r590",
      "r592",
      "r665"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.",
        "label": "Schedule of Long-term Debt Instruments [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfDebtInstrumentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock": {
     "auth_ref": [
      "r528"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.",
        "label": "Schedule of Deferred Tax Assets and Liabilities [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the changes in plan assets and benefit obligations recognized in other comprehensive income (loss) during the period.",
        "label": "Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock": {
     "auth_ref": [
      "r430",
      "r431",
      "r434",
      "r435",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.",
        "label": "Schedule of Defined Benefit Plans Disclosures [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfDefinedBenefitPlansDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": {
     "auth_ref": [
      "r165"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.",
        "label": "Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": {
     "auth_ref": [
      "r519"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.",
        "label": "Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock": {
     "auth_ref": [
      "r405"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter.",
        "label": "Schedule of Expected Benefit Payments [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfExpectedBenefitPaymentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock": {
     "auth_ref": [
      "r122"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of income before income tax between domestic and foreign jurisdictions.",
        "label": "Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfNetFundedStatusTableTextBlock": {
     "auth_ref": [
      "r393"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of net funded status of pension plans and/or other employee benefit plans.",
        "label": "Schedule of Net Funded Status [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfNetFundedStatusTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock": {
     "auth_ref": [
      "r490"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the changes in outstanding nonvested performance-based units.",
        "label": "Schedule of Nonvested Performance-based Units Activity [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock": {
     "auth_ref": [
      "r490"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the changes in outstanding nonvested restricted stock units.",
        "label": "Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock": {
     "auth_ref": [
      "r266",
      "r267",
      "r270"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets.",
        "label": "Restructuring and Related Costs [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfRestructuringAndRelatedCostsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock": {
     "auth_ref": [
      "r263",
      "r272"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period.",
        "label": "Schedule of Restructuring Reserve by Type of Cost [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfRestructuringReserveByTypeOfCostTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock": {
     "auth_ref": [
      "r88",
      "r226"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material.  An entity may also provide subtotals of geographic information about groups of countries.",
        "label": "Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock": {
     "auth_ref": [
      "r503"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.",
        "label": "Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationStockAppreciationRightsAwardActivityTableTextBlock": {
     "auth_ref": [
      "r481"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock appreciation rights awards that were outstanding at the beginning and end of the year, and the number of stock appreciation rights awards that were granted, exercised or converted, forfeited, and expired during the year.",
        "label": "Share-based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationStockAppreciationRightsAwardActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock": {
     "auth_ref": [
      "r481",
      "r496",
      "r498"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.",
        "label": "Share-based Payment Arrangement, Option, Activity [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentDomain": {
     "auth_ref": [
      "r187",
      "r191",
      "r192",
      "r193",
      "r194",
      "r195",
      "r196",
      "r197",
      "r198",
      "r199",
      "r200",
      "r201",
      "r202",
      "r210",
      "r211",
      "r212",
      "r213",
      "r214",
      "r215",
      "r216",
      "r217",
      "r218",
      "r220",
      "r227",
      "r264",
      "r273",
      "r683"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Segments [Domain]"
       }
      }
     },
     "localname": "SegmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SegmentReportingDisclosureTextBlock": {
     "auth_ref": [
      "r187",
      "r189",
      "r190",
      "r200",
      "r203",
      "r214",
      "r218",
      "r219",
      "r220",
      "r221",
      "r223",
      "r226",
      "r227",
      "r228"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.",
        "label": "Segment Reporting Disclosure [Text Block]"
       }
      }
     },
     "localname": "SegmentReportingDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentReportingPolicyPolicyTextBlock": {
     "auth_ref": [
      "r204",
      "r205",
      "r206",
      "r207",
      "r208",
      "r209",
      "r224"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for segment reporting.",
        "label": "Segment Reporting, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "SegmentReportingPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SelfInsuranceReserve": {
     "auth_ref": [
      "r52"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.",
        "label": "us-gaap_SelfInsuranceReserve",
        "terseLabel": "Self Insurance Reserve"
       }
      }
     },
     "localname": "SelfInsuranceReserve",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SelfInsuranceReservePolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for self-insurance reserves, including, but not limited to incurred but not reported reserves (IBNR).",
        "label": "Self Insurance Reserve [Policy Text Block]"
       }
      }
     },
     "localname": "SelfInsuranceReservePolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SellingGeneralAndAdministrativeExpense": {
     "auth_ref": [
      "r89"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 3.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.",
        "label": "Advertising, selling, general and administrative"
       }
      }
     },
     "localname": "SellingGeneralAndAdministrativeExpense",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SeriesAPreferredStockMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Outstanding nonredeemable series A preferred stock or outstanding series A preferred stock. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.",
        "label": "Series A Preferred Stock [Member]"
       }
      }
     },
     "localname": "SeriesAPreferredStockMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShareBasedCompensation": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of noncash expense for share-based payment arrangement.",
        "label": "us-gaap_ShareBasedCompensation",
        "verboseLabel": "Stock-based compensation"
       }
      }
     },
     "localname": "ShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod": {
     "auth_ref": [
      "r488"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod",
        "negatedLabel": "Forfeited, number of shares (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r494"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.",
        "label": "Forfeited, weighted average grant date fair value (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod": {
     "auth_ref": [
      "r492"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r492"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).",
        "label": "Granted, weighted average grant date fair value (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber": {
     "auth_ref": [
      "r491"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
        "periodEndLabel": "Balance, number of shares (in shares)",
        "periodStartLabel": "Balance, number of shares (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r491"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue",
        "periodEndLabel": "Unvested shares outstanding, weighted average grant date fair value (in dollars per share)",
        "periodStartLabel": "Unvested shares outstanding, weighted average grant date fair value (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms": {
     "auth_ref": [
      "r499"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Outstanding, weighted-average remaining contractual term (Year)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod": {
     "auth_ref": [
      "r493"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod",
        "negatedLabel": "Vested, number of shares (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r493"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.",
        "label": "Vested, weighted average grant date fair value (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised": {
     "auth_ref": [
      "r487"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of non-option equity instruments exercised by participants.",
        "label": "Exercised, number of shares (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations": {
     "auth_ref": [
      "r489"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares under non-option equity instrument agreements for which rights to exercise lapsed.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations",
        "negatedLabel": "Expired, number of shares (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted": {
     "auth_ref": [
      "r486"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Net number of non-option equity instruments granted to participants.",
        "label": "Granted, number of shares (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber": {
     "auth_ref": [
      "r482",
      "r484"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of equity instruments other than options outstanding, including both vested and non-vested instruments.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber",
        "periodEndLabel": "Balance, number of shares (in shares)",
        "periodStartLabel": "Balance, number of shares (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized": {
     "auth_ref": [
      "r478"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares authorized for issuance under share-based payment arrangement.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant": {
     "auth_ref": [
      "r503"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber": {
     "auth_ref": [
      "r485"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.",
        "label": "Exercisable at December 31, 2021 (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice": {
     "auth_ref": [
      "r485"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.",
        "label": "Exercisable, weighted average exercise price (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue": {
     "auth_ref": [
      "r497"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.",
        "label": "Exercised, aggregate intrinsic value"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod": {
     "auth_ref": [
      "r489"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod",
        "negatedLabel": "Vested options expired (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod": {
     "auth_ref": [
      "r488"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod",
        "negatedLabel": "Unvested options forfeited (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod": {
     "auth_ref": [
      "r486"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Net number of share options (or share units) granted during the period.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Gross number of share options (or share units) granted during the period.",
        "label": "Granted (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue": {
     "auth_ref": [
      "r503"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.",
        "label": "Options outstanding, aggregate intrinsic value"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber": {
     "auth_ref": [
      "r483",
      "r503"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of options outstanding, including both vested and non-vested options.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
        "periodEndLabel": "Options outstanding (in shares)",
        "periodStartLabel": "Options outstanding (in shares)",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice": {
     "auth_ref": [
      "r482"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.",
        "label": "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice",
        "periodEndLabel": "Options outstanding, weighted average exercise price (in dollars per share)",
        "periodStartLabel": "Options outstanding, weighted average exercise price (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue": {
     "auth_ref": [
      "r498"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Vested and expected to vest, aggregate intrinsic value"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber": {
     "auth_ref": [
      "r499"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Vested and expected to vest (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice": {
     "auth_ref": [
      "r499"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Vested and expected to vest, weighted average exercise price (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": {
     "auth_ref": [
      "r473",
      "r479"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Award under share-based payment arrangement.",
        "label": "Award Type [Domain]"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which option holders acquired shares when converting their stock options into shares.",
        "label": "Exercised, weighted average exercise price (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.",
        "label": "Vested options expired, weighted average exercise price (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.",
        "label": "Unvested options forfeited, weighted average exercise price (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.",
        "label": "Granted, weighted average exercise price (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy": {
     "auth_ref": [
      "r475",
      "r480"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for award under share-based payment arrangement. Includes, but is not limited to, methodology and assumption used in measuring cost.",
        "label": "Share-based Payment Arrangement [Policy Text Block]"
       }
      }
     },
     "localname": "ShareBasedCompensationOptionAndIncentivePlansPolicy",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit": {
     "auth_ref": [
      "r500"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.",
        "label": "Exercise price range, lower limit (in dollars per share)",
        "terseLabel": "Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions": {
     "auth_ref": [
      "r495"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.",
        "label": "Exercise price range, number exercisable (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions": {
     "auth_ref": [
      "r483"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.",
        "label": "Exercise price range, number outstanding (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit": {
     "auth_ref": [
      "r500"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.",
        "label": "Exercise price range, higher limit (in dollars per share)",
        "terseLabel": "Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage": {
     "auth_ref": [
      "r476"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of vesting of award under share-based payment arrangement.",
        "label": "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod": {
     "auth_ref": [
      "r477"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1": {
     "auth_ref": [
      "r503"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.",
        "label": "Exercisable, aggregate intrinsic value"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1": {
     "auth_ref": [
      "r503"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Exercisable, weighted average remaining contractual term (Year)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2": {
     "auth_ref": [
      "r499"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Options outstanding, weighted average remaining contractual term (Year)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1": {
     "auth_ref": [
      "r499"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Vested and expected to vest, weighted average remaining contractual term (Year)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1": {
     "auth_ref": [
      "r483"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.",
        "label": "Weighted-average exercise price, outstanding (in dollars per share)"
       }
      }
     },
     "localname": "SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2": {
     "auth_ref": [
      "r499"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Weighted-average remaining life (Year)"
       }
      }
     },
     "localname": "SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharesIssuedPricePerShare": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share or per unit amount of equity securities issued.",
        "label": "us-gaap_SharesIssuedPricePerShare",
        "terseLabel": "Shares Issued, Price Per Share (in dollars per share)"
       }
      }
     },
     "localname": "SharesIssuedPricePerShare",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SignificantAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r115",
      "r127"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.",
        "label": "Significant Accounting Policies [Text Block]"
       }
      }
     },
     "localname": "SignificantAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SoftwareAndSoftwareDevelopmentCostsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Purchased software applications and internally developed software for sale, licensing or long-term internal use.",
        "label": "Software and Software Development Costs [Member]"
       }
      }
     },
     "localname": "SoftwareAndSoftwareDevelopmentCostsMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_StandbyLettersOfCreditMember": {
     "auth_ref": [
      "r281",
      "r282",
      "r555",
      "r697"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "An irrevocable undertaking (typically by a financial institution) to guarantee payment of a specified financial obligation.",
        "label": "Standby Letters of Credit [Member]"
       }
      }
     },
     "localname": "StandbyLettersOfCreditMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_StateAndLocalJurisdictionMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Designated tax department of a state or local government entitled to levy and collect income taxes from the entity.",
        "label": "State and Local Jurisdiction [Member]"
       }
      }
     },
     "localname": "StateAndLocalJurisdictionMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_StatementBusinessSegmentsAxis": {
     "auth_ref": [
      "r2",
      "r187",
      "r191",
      "r192",
      "r193",
      "r194",
      "r195",
      "r196",
      "r197",
      "r198",
      "r199",
      "r200",
      "r201",
      "r202",
      "r210",
      "r211",
      "r212",
      "r213",
      "r214",
      "r215",
      "r216",
      "r217",
      "r218",
      "r220",
      "r227",
      "r250",
      "r259",
      "r264",
      "r273",
      "r683"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by business segments.",
        "label": "Segments [Axis]"
       }
      }
     },
     "localname": "StatementBusinessSegmentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementClassOfStockAxis": {
     "auth_ref": [
      "r26",
      "r27",
      "r28",
      "r119",
      "r121",
      "r151",
      "r152",
      "r157",
      "r161",
      "r165",
      "r174",
      "r175",
      "r176",
      "r237",
      "r283",
      "r288",
      "r289",
      "r290",
      "r296",
      "r297",
      "r326",
      "r327",
      "r330",
      "r331",
      "r333",
      "r576",
      "r739"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by the different classes of stock of the entity.",
        "label": "Class of Stock [Axis]"
       }
      }
     },
     "localname": "StatementClassOfStockAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r0",
      "r55",
      "r74",
      "r75",
      "r76",
      "r128",
      "r129",
      "r130",
      "r134",
      "r142",
      "r144",
      "r173",
      "r238",
      "r333",
      "r339",
      "r504",
      "r505",
      "r506",
      "r537",
      "r538",
      "r568",
      "r581",
      "r582",
      "r583",
      "r584",
      "r585",
      "r587",
      "r688",
      "r689",
      "r690",
      "r742"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Equity Components [Axis]"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Statement [Line Items]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-b-recent-accounting-pronouncements",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-contract-balances-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-loss-before-income-taxes-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-m-certain-relationships-and-related-party-transactions",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-tables",
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Stockholders' Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [
      "r128",
      "r129",
      "r130",
      "r173",
      "r633"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.",
        "label": "Statement [Table]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-allowance-for-doubtful-accounts-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-operations-in-different-geographic-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-property-plant-and-equipment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-b-recent-accounting-pronouncements",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-contract-balances-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-maturities-of-finance-and-operating-lease-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-supplemental-balance-sheet-information-details",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-longterm-debt-details",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-performance-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-phantom-stock-unit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-restricted-stock-units-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-information-about-stock-option-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-acceptable-level-of-volatility-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-accumulated-benefit-of-obligation-in-excess-of-plan-asset-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-defined-benefit-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-expected-future-benefit-payments-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-net-period-of-net-periodic-cost-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-plan-assets-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-accumulated-other-comprehensive-loss-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-recognized-in-balance-sheet-details",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-weightedaverage-assumptions-used-for-measurement-of-defined-pension-plans-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-component-of-loss-before-income-taxes-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-differences-between-total-income-tax-benefit-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-income-tax-benefit-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-reconciliation-of-deferred-tax-valuation-allowance-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-significant-portions-of-the-deferred-tax-assets-and-deferred-tax-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies",
      "http://www.hartehanks.com/20211231/role/statement-note-l-litigation-and-contingencies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-m-certain-relationships-and-related-party-transactions",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-financial-information-by-segment-details",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-tables",
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockAppreciationRightsSARSMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Right to receive cash or shares equal to appreciation of predetermined number of grantor's shares during predetermined time period.",
        "label": "Stock Appreciation Rights (SARs) [Member]"
       }
      }
     },
     "localname": "StockAppreciationRightsSARSMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-cash-stock-appreciations-rights-details",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesNewIssues": {
     "auth_ref": [
      "r27",
      "r28",
      "r333",
      "r339"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of new stock issued during the period.",
        "label": "us-gaap_StockIssuedDuringPeriodSharesNewIssues",
        "terseLabel": "Stock Issued During Period, Shares, New Issues (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised": {
     "auth_ref": [
      "r27",
      "r28",
      "r333",
      "r339",
      "r487"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of share options (or share units) exercised during the current period.",
        "label": "Exercised (in shares)",
        "negatedLabel": "Exercised (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-summarizes-all-stock-option-activity-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueNewIssues": {
     "auth_ref": [
      "r27",
      "r28",
      "r333",
      "r339"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.",
        "label": "us-gaap_StockIssuedDuringPeriodValueNewIssues",
        "terseLabel": "Stock Issued During Period, Value, New Issues"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised": {
     "auth_ref": [
      "r55",
      "r333",
      "r339"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of stock issued as a result of the exercise of stock options.",
        "label": "Exercise of stock options"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued": {
     "auth_ref": [
      "r27",
      "r28",
      "r333",
      "r339",
      "r340"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement.",
        "label": "Vesting of RSU's"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueTreasuryStockReissued",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r28",
      "r33",
      "r34",
      "r121",
      "r233",
      "r237",
      "r576",
      "r622"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.",
        "label": "us-gaap_StockholdersEquity",
        "periodEndLabel": "Balance",
        "periodStartLabel": "Balance",
        "totalLabel": "Total stockholders\u2019 deficit"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets",
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-changes-in-accumulated-other-comprehensive-loss-by-component-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Stockholders\u2019 deficit"
       }
      }
     },
     "localname": "StockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubleaseIncome": {
     "auth_ref": [
      "r604",
      "r610"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details": {
       "order": 0.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of sublease income excluding finance and operating lease expense.",
        "label": "us-gaap_SubleaseIncome",
        "negatedLabel": "Sublease income"
       }
      }
     },
     "localname": "SubleaseIncome",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SummaryOfValuationAllowanceTextBlock": {
     "auth_ref": [
      "r527"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance.",
        "label": "Summary of Valuation Allowance [Table Text Block]"
       }
      }
     },
     "localname": "SummaryOfValuationAllowanceTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SupplementalCashFlowInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Supplemental disclosures"
       }
      }
     },
     "localname": "SupplementalCashFlowInformationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-cash-flows-"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "us-gaap_TableTextBlock",
        "terseLabel": "Notes Tables"
       }
      }
     },
     "localname": "TableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-a-overview-and-significant-accounting-policies-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-h-employee-benefit-plans-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-k-comprehensive-income-loss-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-tables",
      "http://www.hartehanks.com/20211231/role/statement-note-o-segment-reporting-tables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TaxCreditCarryforwardAmount": {
     "auth_ref": [
      "r531"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.",
        "label": "us-gaap_TaxCreditCarryforwardAmount",
        "terseLabel": "Tax Credit Carryforward, Amount"
       }
      }
     },
     "localname": "TaxCreditCarryforwardAmount",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TaxPeriodAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information about the period subject to enacted tax laws.",
        "label": "Tax Period [Axis]"
       }
      }
     },
     "localname": "TaxPeriodAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TaxPeriodDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identified tax period.",
        "label": "Tax Period [Domain]"
       }
      }
     },
     "localname": "TaxPeriodDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TaxYear2018Member": {
     "auth_ref": [
      "r521"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identified as tax year 2018.",
        "label": "Tax Year 2018 [Member]"
       }
      }
     },
     "localname": "TaxYear2018Member",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TaxYear2019Member": {
     "auth_ref": [
      "r521"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identified as tax year 2019.",
        "label": "Tax Year 2019 [Member]"
       }
      }
     },
     "localname": "TaxYear2019Member",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TaxYear2020Member": {
     "auth_ref": [
      "r521"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identified as tax year 2020.",
        "label": "Tax Year 2020 [Member]"
       }
      }
     },
     "localname": "TaxYear2020Member",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes",
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TemporaryEquityCarryingAmountAttributableToParent": {
     "auth_ref": [
      "r283",
      "r288",
      "r289",
      "r290",
      "r296",
      "r297"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 0.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.",
        "label": "Preferred stock, $1 par value, 1,000,000 shares authorized; 9,926 shares of Series A Convertible Preferred Stock, issued and outstanding"
       }
      }
     },
     "localname": "TemporaryEquityCarryingAmountAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TemporaryEquityLiquidationPreference": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.",
        "label": "us-gaap_TemporaryEquityLiquidationPreference",
        "terseLabel": "Temporary Equity, Liquidation Preference"
       }
      }
     },
     "localname": "TemporaryEquityLiquidationPreference",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TemporaryEquityLiquidationPreferencePerShare": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The per share liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.",
        "label": "us-gaap_TemporaryEquityLiquidationPreferencePerShare",
        "terseLabel": "Temporary Equity, Liquidation Preference Per Share (in dollars per share)"
       }
      }
     },
     "localname": "TemporaryEquityLiquidationPreferencePerShare",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-e-convertible-preferred-stock-details-textual"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_TemporaryEquityParOrStatedValuePerShare": {
     "auth_ref": [
      "r13",
      "r325"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share amount of par value or stated value of stock classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable.",
        "label": "Preferred stock, par value (in dollars per share)"
       }
      }
     },
     "localname": "TemporaryEquityParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_TemporaryEquitySharesIssued": {
     "auth_ref": [
      "r25"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.",
        "label": "Preferred stock, shares issued (in shares)"
       }
      }
     },
     "localname": "TemporaryEquitySharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_TemporaryEquitySharesOutstanding": {
     "auth_ref": [
      "r25"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.",
        "label": "Preferred stock, shares outstanding (in shares)"
       }
      }
     },
     "localname": "TemporaryEquitySharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_TimingOfTransferOfGoodOrServiceAxis": {
     "auth_ref": [
      "r356",
      "r362"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by timing of transfer of good or service to customer.",
        "label": "Timing of Transfer of Good or Service [Axis]"
       }
      }
     },
     "localname": "TimingOfTransferOfGoodOrServiceAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TimingOfTransferOfGoodOrServiceDomain": {
     "auth_ref": [
      "r356",
      "r362"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Timing of transfer of good or service to customer. Includes, but is not limited to, at point in time or over time.",
        "label": "Timing of Transfer of Good or Service [Domain]"
       }
      }
     },
     "localname": "TimingOfTransferOfGoodOrServiceDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransferredAtPointInTimeMember": {
     "auth_ref": [
      "r362"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contract with customer in which good or service is transferred at point in time.",
        "label": "Transferred at Point in Time [Member]"
       }
      }
     },
     "localname": "TransferredAtPointInTimeMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransferredOverTimeMember": {
     "auth_ref": [
      "r362"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contract with customer in which good or service is transferred over time.",
        "label": "Transferred over Time [Member]"
       }
      }
     },
     "localname": "TransferredOverTimeMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-c-revenue-from-contracts-with-customers-disaggregation-of-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TreasuryStockMember": {
     "auth_ref": [
      "r54",
      "r340"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Shares of an entity that have been repurchased by the entity. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.",
        "label": "Treasury Stock [Member]"
       }
      }
     },
     "localname": "TreasuryStockMember",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-changes-in-stockholders-deficit"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TreasuryStockShares": {
     "auth_ref": [
      "r54",
      "r340"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.",
        "label": "Treasury stock, shares (in shares)"
       }
      }
     },
     "localname": "TreasuryStockShares",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_TreasuryStockValue": {
     "auth_ref": [
      "r54",
      "r340",
      "r341"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 0.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.",
        "label": "us-gaap_TreasuryStockValue",
        "negatedLabel": "Less treasury stock, 5,145,340 shares at cost at December 31, 2021 and 5,522,175 shares at cost at December 31, 2020"
       }
      }
     },
     "localname": "TreasuryStockValue",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TypeOfRestructuringDomain": {
     "auth_ref": [
      "r262",
      "r263",
      "r271",
      "r272"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identification of the types of restructuring costs.",
        "label": "Type of Restructuring [Domain]"
       }
      }
     },
     "localname": "TypeOfRestructuringDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-changes-in-liabilities-details",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-details-textual",
      "http://www.hartehanks.com/20211231/role/statement-note-n-restructuring-activities-restructuring-expense-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UnbilledReceivablesCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets": {
       "order": 5.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.",
        "label": "Unbilled accounts receivable"
       }
      }
     },
     "localname": "UnbilledReceivablesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-balance-sheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic": {
     "auth_ref": [
      "r159",
      "r162",
      "r163"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic",
       "weight": -1.0
      },
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details": {
       "order": 0.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of undistributed earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.",
        "label": "Less: Earnings attributable to participating securities"
       }
      }
     },
     "localname": "UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrecognizedTaxBenefits": {
     "auth_ref": [
      "r513",
      "r522"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of unrecognized tax benefits.",
        "label": "us-gaap_UnrecognizedTaxBenefits",
        "terseLabel": "Unrecognized Tax Benefits, Ending Balance"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefits",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-i-income-taxes-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UseOfEstimates": {
     "auth_ref": [
      "r177",
      "r178",
      "r179",
      "r180",
      "r184",
      "r185",
      "r186"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.",
        "label": "Use of Estimates, Policy [Policy Text Block]"
       }
      }
     },
     "localname": "UseOfEstimates",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-significant-accounting-policies-policies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_VariableLeaseCost": {
     "auth_ref": [
      "r603",
      "r610"
     ],
     "calculation": {
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details": {
       "order": 1.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.",
        "label": "Variable lease cost"
       }
      }
     },
     "localname": "VariableLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-d-leases-components-of-lease-expense-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_VariableRateAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of variable rate.",
        "label": "Variable Rate [Axis]"
       }
      }
     },
     "localname": "VariableRateAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_VariableRateDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.",
        "label": "Variable Rate [Domain]"
       }
      }
     },
     "localname": "VariableRateDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt",
      "http://www.hartehanks.com/20211231/role/statement-note-f-longterm-debt-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VestingAxis": {
     "auth_ref": [
      "r503"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by vesting schedule of award under share-based payment arrangement.",
        "label": "Vesting [Axis]"
       }
      }
     },
     "localname": "VestingAxis",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_VestingDomain": {
     "auth_ref": [
      "r503"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Vesting schedule of award under share-based payment arrangement.",
        "label": "Vesting [Domain]"
       }
      }
     },
     "localname": "VestingDomain",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation",
      "http://www.hartehanks.com/20211231/role/statement-note-g-stockbased-compensation-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": {
     "auth_ref": [
      "r150",
      "r165"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.",
        "label": "Diluted (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfDilutedSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": {
     "auth_ref": [
      "r148",
      "r165"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.",
        "label": "Basic (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingBasic",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss",
      "http://www.hartehanks.com/20211231/role/statement-note-j-earnings-per-share-reconciliations-of-basic-and-diluted-eps-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Weighted-average shares used to compute income (loss) per share attributable to common shares"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2021-01-31",
     "presentation": [
      "http://www.hartehanks.com/20211231/role/statement-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "stringItemType"
    }
   },
   "unitCount": 8
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "105",
   "URI": "http://asc.fasb.org/extlink&oid=124434974&loc=SL124442142-165695"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "105",
   "URI": "http://asc.fasb.org/extlink&oid=124434974&loc=SL124442142-165695"
  },
  "r10": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6812-107765"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3367-108585"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3367-108585"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3521-108585"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585"
  },
  "r107": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4273-108586"
  },
  "r11": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6904-107765"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4297-108586"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=SL98516268-108586"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=123372394&loc=d3e18726-107790"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=123372394&loc=d3e18823-107790"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=123372394&loc=d3e18823-107790"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=123372394&loc=d3e18823-107790"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(d))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r12": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6911-107765"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(f))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(g)(1)(ii))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(1)(Note 1))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(1))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(2))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(a))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690"
  },
  "r127": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "http://asc.fasb.org/topic&trid=2122369"
  },
  "r128": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124436220&loc=d3e21914-107793"
  },
  "r129": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124436220&loc=d3e21930-107793"
  },
  "r13": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(27)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124436220&loc=d3e21711-107793"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(4)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794"
  },
  "r14": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.M.Q2)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=122038215&loc=d3e31137-122693"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=122038215&loc=SL108384541-122693"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "250",
   "URI": "http://asc.fasb.org/topic&trid=2122394"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1448-109256"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1377-109256"
  },
  "r15": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(12))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1505-109256"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1252-109256"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1278-109256"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1930-109256"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1930-109256"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1930-109256"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1930-109256"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "55",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e2626-109256"
  },
  "r158": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256"
  },
  "r16": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(13))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "65",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e2793-109256"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "66",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e2814-109256"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1337-109256"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537"
  },
  "r17": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(14))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125512782&loc=d3e3842-109258"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "52",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=125512782&loc=d3e4984-109258"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "260",
   "URI": "http://asc.fasb.org/topic&trid=2144383"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=125520817&loc=d3e70191-108054"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=125520817&loc=d3e70229-108054"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6161-108592"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(19))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6191-108592"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6061-108592"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6132-108592"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6143-108592"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8657-108599"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(2))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r193": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r194": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(j)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760"
  },
  "r20": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(20))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "26",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8844-108599"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8864-108599"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8864-108599"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8864-108599"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8864-108599"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8864-108599"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8864-108599"
  },
  "r21": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(22))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "31",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(24))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "34",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8981-108599"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8475-108599"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "42",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "280",
   "URI": "http://asc.fasb.org/topic&trid=2134510"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(26)(a))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=124259787&loc=d3e4531-111522"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=123577603&loc=d3e5144-111524"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 4.E)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=122038336&loc=d3e74512-122707"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(d)(1)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=124402435&loc=SL124402458-218513"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(d)(2)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=124402435&loc=SL124402458-218513"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "320",
   "URI": "http://asc.fasb.org/topic&trid=2196928"
  },
  "r237": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r238": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r239": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(26)(b))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r241": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "10",
   "Topic": "340",
   "URI": "http://asc.fasb.org/extlink&oid=123349782&loc=d3e5879-108316"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "340",
   "URI": "http://asc.fasb.org/extlink&oid=6387103&loc=d3e6435-108320"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "340",
   "URI": "http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "340",
   "URI": "http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(27)(b))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r250": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "40",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=118172244&loc=d3e17916-109280"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "50",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=16397303&loc=d3e19347-109286"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(27))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=109237686&loc=d3e17752-110868"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r262": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r263": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r264": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r265": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r267": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 5.P.3)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.3)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747"
  },
  "r269": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 5.P.4(b)(2))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(28))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r270": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 5.P.4)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r271": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(b)(1))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(b)(2))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r273": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(d))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r274": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(e))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r275": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "420",
   "URI": "http://asc.fasb.org/topic&trid=2175745"
  },
  "r276": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "440",
   "URI": "http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "440",
   "URI": "http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308"
  },
  "r278": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "http://asc.fasb.org/topic&trid=2144648"
  },
  "r279": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "http://asc.fasb.org/topic&trid=2127136"
  },
  "r281": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248"
  },
  "r282": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=123408193&loc=d3e12803-110250"
  },
  "r283": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(i))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(ii))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii)(A))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii)(B))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756"
  },
  "r287": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756"
  },
  "r288": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iv))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756"
  },
  "r289": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(5))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r290": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(i))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(A)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(A))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(B)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(B))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756"
  },
  "r295": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(C))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756"
  },
  "r296": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iv))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756"
  },
  "r297": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(5))",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756"
  },
  "r298": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r299": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r300": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r301": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r302": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r303": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r304": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r305": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611"
  },
  "r306": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611"
  },
  "r307": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611"
  },
  "r308": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611"
  },
  "r309": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r310": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611"
  },
  "r311": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r312": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r313": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r314": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r315": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870"
  },
  "r316": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870"
  },
  "r317": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870"
  },
  "r318": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69B",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612"
  },
  "r319": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69C",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(4))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r320": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69E",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466577&loc=SL123495743-112612"
  },
  "r321": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123466577&loc=SL123495745-112612"
  },
  "r322": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "40",
   "SubTopic": "50",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123467658&loc=d3e12317-112629"
  },
  "r323": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "40",
   "SubTopic": "50",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=123467658&loc=d3e12355-112629"
  },
  "r324": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "470",
   "URI": "http://asc.fasb.org/topic&trid=2208564"
  },
  "r325": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Topic": "480",
   "URI": "http://asc.fasb.org/extlink&oid=122040564&loc=d3e177068-122764"
  },
  "r326": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644"
  },
  "r327": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644"
  },
  "r328": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644"
  },
  "r329": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644"
  },
  "r33": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r330": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644"
  },
  "r331": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644"
  },
  "r332": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496180-112644"
  },
  "r333": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644"
  },
  "r334": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644"
  },
  "r335": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21506-112644"
  },
  "r336": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21506-112644"
  },
  "r337": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21521-112644"
  },
  "r338": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21538-112644"
  },
  "r339": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(31))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r340": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655"
  },
  "r341": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656"
  },
  "r342": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "505",
   "URI": "http://asc.fasb.org/topic&trid=2208762"
  },
  "r343": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044"
  },
  "r344": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044"
  },
  "r345": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123360276&loc=SL49130533-203044"
  },
  "r346": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045"
  },
  "r347": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045"
  },
  "r348": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045"
  },
  "r349": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(32))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r350": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045"
  },
  "r351": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045"
  },
  "r352": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045"
  },
  "r353": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045"
  },
  "r354": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130558-203045"
  },
  "r355": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045"
  },
  "r356": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045"
  },
  "r357": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045"
  },
  "r358": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045"
  },
  "r359": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130550-203045"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(4)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r360": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046"
  },
  "r361": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046"
  },
  "r362": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046"
  },
  "r363": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(g)(2)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123338486&loc=SL49131195-203048"
  },
  "r364": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(i)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123338486&loc=SL49131195-203048"
  },
  "r365": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(i)(2)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123338486&loc=SL49131195-203048"
  },
  "r366": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(j)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=123338486&loc=SL49131195-203048"
  },
  "r367": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "606",
   "URI": "http://asc.fasb.org/topic&trid=49130388"
  },
  "r368": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "712",
   "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664"
  },
  "r369": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "712",
   "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(4))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r370": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919"
  },
  "r371": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123453770&loc=d3e1731-114919"
  },
  "r372": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919"
  },
  "r373": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r374": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r375": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(10)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r376": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r377": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r378": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r379": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.1)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r380": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r381": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r382": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(8)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r383": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(9)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r384": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r385": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r386": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r387": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r388": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r389": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.13(a))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r390": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r391": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r392": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(8)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r393": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r394": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r395": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(i)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r396": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(ii)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r397": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iii)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r398": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(01)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r399": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.13)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r400": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(A)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r401": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(B)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r402": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(C)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r403": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(03)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r404": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r405": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r406": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r407": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r408": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r409": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.14)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r410": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r411": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r412": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r413": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r414": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r415": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(i)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r416": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(j)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r417": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r418": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r419": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.15)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r420": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r421": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r422": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(l)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r423": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r424": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(o)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r425": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(p)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r426": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(q)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r427": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(r)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r428": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(r)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r429": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(s)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r43": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.17)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r430": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r431": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2410-114920"
  },
  "r432": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920"
  },
  "r433": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920"
  },
  "r434": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920"
  },
  "r435": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2439-114920"
  },
  "r436": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r437": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r438": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r439": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(a))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r440": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r441": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r442": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r443": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r444": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r445": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920"
  },
  "r446": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921"
  },
  "r447": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921"
  },
  "r448": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=21916913&loc=d3e273930-122802"
  },
  "r449": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=6414203&loc=d3e39689-114964"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(b),22(b))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r450": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964"
  },
  "r451": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "70",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942"
  },
  "r452": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=29639808&loc=d3e29008-114946"
  },
  "r453": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r454": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r455": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r456": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r457": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r458": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r459": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19,20)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r460": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r461": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r462": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r463": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r464": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r465": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r466": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r467": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r468": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r469": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19-26)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r470": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948"
  },
  "r471": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "715",
   "URI": "http://asc.fasb.org/topic&trid=2235017"
  },
  "r472": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=123468992&loc=d3e4534-113899"
  },
  "r473": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r474": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r475": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r476": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r477": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r478": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r479": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a),(g)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.20)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r480": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b),(f)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r481": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r482": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(i)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r483": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(i)-(ii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r484": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(ii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r485": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r486": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r487": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r488": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(3)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r489": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(4)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.21)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r490": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r491": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(i)-(ii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r492": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r493": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r494": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(3)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r495": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(iii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r496": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r497": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r498": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r499": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r500": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r501": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(1)(i)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r502": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(i)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r503": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r504": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r505": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r506": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r507": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(g)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r508": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(g)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r509": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 14.F)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r510": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=122142933&loc=d3e11149-113907"
  },
  "r511": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=122142933&loc=d3e11178-113907"
  },
  "r512": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "718",
   "URI": "http://asc.fasb.org/topic&trid=2228938"
  },
  "r513": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318"
  },
  "r514": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=d3e32059-109318"
  },
  "r515": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=d3e32247-109318"
  },
  "r516": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=d3e32280-109318"
  },
  "r517": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=d3e31931-109318"
  },
  "r518": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32672-109319"
  },
  "r519": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.24)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r520": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319"
  },
  "r521": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319"
  },
  "r522": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319"
  },
  "r523": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319"
  },
  "r524": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32840-109319"
  },
  "r525": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319"
  },
  "r526": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319"
  },
  "r527": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319"
  },
  "r528": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319"
  },
  "r529": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32847-109319"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.25)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r530": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319"
  },
  "r531": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319"
  },
  "r532": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319"
  },
  "r533": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319"
  },
  "r534": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319"
  },
  "r535": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319"
  },
  "r536": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319"
  },
  "r537": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277"
  },
  "r538": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(3)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277"
  },
  "r539": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29,30)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r540": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277"
  },
  "r541": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277"
  },
  "r542": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.5.Q1)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r543": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.7)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r544": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.7)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r545": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.1)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r546": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.2)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r547": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.3)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r548": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.4)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r549": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.C)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29-31)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r550": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123586238&loc=d3e38679-109324"
  },
  "r551": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=123586238&loc=d3e38679-109324"
  },
  "r552": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "270",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338"
  },
  "r553": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331"
  },
  "r554": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "740",
   "URI": "http://asc.fasb.org/topic&trid=2144680"
  },
  "r555": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116873149&loc=d3e923-111674"
  },
  "r556": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=SL4569616-111683"
  },
  "r557": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=SL4569643-111683"
  },
  "r558": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r559": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.8)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r560": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=d3e5614-111684"
  },
  "r561": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(3)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r562": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c),(3)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r563": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685"
  },
  "r564": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685"
  },
  "r565": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959"
  },
  "r566": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959"
  },
  "r567": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011"
  },
  "r568": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(3)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011"
  },
  "r569": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(4)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.9)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r570": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011"
  },
  "r571": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258"
  },
  "r572": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "60",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=7493716&loc=d3e21868-110260"
  },
  "r573": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=123594938&loc=d3e13279-108611"
  },
  "r574": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611"
  },
  "r575": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611"
  },
  "r576": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612"
  },
  "r577": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL121967933-165497"
  },
  "r578": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL121967933-165497"
  },
  "r579": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL121967933-165497"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a),(b),(c)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580"
  },
  "r580": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=123444420&loc=d3e33268-110906"
  },
  "r581": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900"
  },
  "r582": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r583": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r584": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r585": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r586": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r587": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901"
  },
  "r588": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "830",
   "URI": "http://asc.fasb.org/topic&trid=2175825"
  },
  "r589": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(i),(j),(k)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580"
  },
  "r590": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399"
  },
  "r591": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629"
  },
  "r592": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400"
  },
  "r593": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977"
  },
  "r594": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977"
  },
  "r595": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977"
  },
  "r596": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977"
  },
  "r597": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977"
  },
  "r598": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977"
  },
  "r599": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918666-209980"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(i-k)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580"
  },
  "r600": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980"
  },
  "r601": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980"
  },
  "r602": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980"
  },
  "r603": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980"
  },
  "r604": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980"
  },
  "r605": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(1)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980"
  },
  "r606": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980"
  },
  "r607": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(4)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980"
  },
  "r608": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980"
  },
  "r609": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580"
  },
  "r610": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "53",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971"
  },
  "r611": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=124258985&loc=SL77919396-209981"
  },
  "r612": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "848",
   "URI": "http://asc.fasb.org/extlink&oid=122150657&loc=SL122150809-237846"
  },
  "r613": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r614": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r615": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r616": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r617": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864"
  },
  "r618": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864"
  },
  "r619": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "850",
   "URI": "http://asc.fasb.org/topic&trid=2122745"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580"
  },
  "r620": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "852",
   "URI": "http://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765"
  },
  "r621": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "852",
   "URI": "http://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765"
  },
  "r622": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "852",
   "URI": "http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766"
  },
  "r623": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r624": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r625": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r626": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r627": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r628": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r629": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=d3e681-108580"
  },
  "r630": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r631": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r632": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "910",
   "URI": "http://asc.fasb.org/extlink&oid=123353855&loc=SL119991595-234733"
  },
  "r633": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.L)",
   "Topic": "924",
   "URI": "http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856"
  },
  "r634": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(1)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r635": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(2)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r636": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(3)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r637": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e61929-109447"
  },
  "r638": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e61929-109447"
  },
  "r639": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e62059-109447"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580"
  },
  "r640": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e62059-109447"
  },
  "r641": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e62395-109447"
  },
  "r642": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e62395-109447"
  },
  "r643": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e62479-109447"
  },
  "r644": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e62479-109447"
  },
  "r645": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=SL6807758-109447"
  },
  "r646": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=SL6807758-109447"
  },
  "r647": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(1)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e61872-109447"
  },
  "r648": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(2)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=123377692&loc=d3e61872-109447"
  },
  "r649": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "940",
   "URI": "http://asc.fasb.org/extlink&oid=123384075&loc=d3e41242-110953"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=d3e689-108580"
  },
  "r650": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(1)(a))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r651": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(11))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r652": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(13))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r653": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(15)(2))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r654": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(15))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r655": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(16))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r656": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r657": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(15))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r658": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(22))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r659": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL34724391-108580"
  },
  "r660": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(26))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r661": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(27))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r662": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.10)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r663": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.9-05(b)(2))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884"
  },
  "r664": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=124429447&loc=SL124453093-239630"
  },
  "r665": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "470",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823"
  },
  "r666": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(15)(b)(2))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r667": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(16))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r668": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(1)(b))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r669": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(12))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669619-108580"
  },
  "r670": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(15))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r671": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(16))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r672": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(2))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r673": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(3))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r674": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r675": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(25))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r676": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(8))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r677": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(18))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r678": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(19))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r679": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(22))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669619-108580"
  },
  "r680": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(23))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r681": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(8))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r682": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(9))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r683": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438"
  },
  "r684": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439"
  },
  "r685": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124504033&loc=SL117783719-158441"
  },
  "r686": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124504033&loc=SL117783719-158441"
  },
  "r687": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124504033&loc=SL117819544-158441"
  },
  "r688": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r689": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669619-108580"
  },
  "r690": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r691": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(i)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r692": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(ii)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r693": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iii)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r694": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iv)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r695": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r696": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "825",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=123600520&loc=SL75241803-196195"
  },
  "r697": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=66023616&loc=SL35737432-115832"
  },
  "r698": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r699": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r7": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669625-108580"
  },
  "r700": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r701": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r702": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r703": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r704": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r705": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r706": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r707": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column B)(Footnote 2))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010"
  },
  "r708": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column B))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010"
  },
  "r709": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column C)(Footnote 2))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669625-108580"
  },
  "r710": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column C))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010"
  },
  "r711": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column A))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010"
  },
  "r712": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column B))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010"
  },
  "r713": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column C))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010"
  },
  "r714": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column D))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010"
  },
  "r715": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "310",
   "Subparagraph": "(SX 210.12-29(Footnote 4))",
   "Topic": "948",
   "URI": "http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014"
  },
  "r716": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Topic": "954",
   "URI": "http://asc.fasb.org/extlink&oid=123364037&loc=d3e3115-115594"
  },
  "r717": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "440",
   "Subparagraph": "(a)",
   "Topic": "954",
   "URI": "http://asc.fasb.org/extlink&oid=6491277&loc=d3e6429-115629"
  },
  "r718": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Subparagraph": "(d)",
   "Topic": "958",
   "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916"
  },
  "r719": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "958",
   "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=d3e557-108580"
  },
  "r720": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column B))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r721": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column C))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r722": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column D))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r723": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column E))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r724": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column F))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r725": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column G))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r726": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column H))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r727": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column I))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r728": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 2))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r729": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Subparagraph": "(c)",
   "Topic": "976",
   "URI": "http://asc.fasb.org/extlink&oid=6497875&loc=d3e22274-108663"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124431353&loc=SL116659661-227067"
  },
  "r730": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Subparagraph": "(b)",
   "Topic": "978",
   "URI": "http://asc.fasb.org/extlink&oid=123360121&loc=d3e27327-108691"
  },
  "r731": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "985",
   "URI": "http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756"
  },
  "r732": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r733": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r734": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r735": {
   "Name": "Form 10-K",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "310"
  },
  "r736": {
   "Name": "Form 20-F",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "220",
   "Subsection": "f"
  },
  "r737": {
   "Name": "Form 40-F",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "240",
   "Subsection": "f"
  },
  "r738": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1"
  },
  "r739": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(a)",
   "Publisher": "SEC",
   "Section": "1402"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124431353&loc=SL124442407-227067"
  },
  "r740": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r741": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r742": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)(iii)(03)",
   "Topic": "848"
  },
  "r743": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "848"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124431353&loc=SL124442411-227067"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=124507222&loc=d3e1436-108581"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(1))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(10))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6787-107765"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(20))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(21))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(24))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(25))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(5))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(b)(2))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(b)(4))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r88": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.1)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r89": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.4)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r9": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6801-107765"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.8)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.9)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "220",
   "URI": "http://asc.fasb.org/topic&trid=2134417"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585"
  },
  "r98": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585"
  }
 },
 "version": "2.1"
}
