{
 "instance": {
  "sgmo-20200331.htm": {
   "axisCustom": 1,
   "axisStandard": 21,
   "contextCount": 220,
   "dts": {
    "calculationLink": {
     "local": [
      "sgmo-20200331_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "sgmo-20200331_def.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-eedm-def-2018-01-31.xml",
      "http://xbrl.fasb.org/srt/2018/elts/srt-eedm1-def-2018-01-31.xml"
     ]
    },
    "inline": {
     "local": [
      "sgmo-20200331.htm"
     ]
    },
    "labelLink": {
     "local": [
      "sgmo-20200331_lab.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-doc-2018-01-31.xml",
      "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "sgmo-20200331_pre.xml"
     ]
    },
    "referenceLink": {
     "remote": [
      "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml",
      "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-ref-2018-01-31.xml"
     ]
    },
    "schema": {
     "local": [
      "sgmo-20200331.xsd"
     ],
     "remote": [
      "http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd",
      "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/dtr/type/numeric-2009-12-16.xsd",
      "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://xbrl.fasb.org/srt/2018/elts/srt-types-2018-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2018/elts/us-roles-2018-01-31.xsd",
      "http://xbrl.fasb.org/srt/2018/elts/srt-roles-2018-01-31.xsd",
      "http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2018/elts/us-types-2018-01-31.xsd",
      "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.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/deprecated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "http://xbrl.fasb.org/us-gaap/2018/elts/us-parts-codification-2018-01-31.xsd"
     ]
    }
   },
   "elementCount": 425,
   "entityCount": 1,
   "hidden": {
    "http://fasb.org/us-gaap/2018-01-31": 1,
    "http://www.sangamo.com/20200331": 3,
    "http://xbrl.sec.gov/dei/2019-01-31": 5,
    "total": 9
   },
   "keyCustom": 52,
   "keyStandard": 272,
   "memberCustom": 40,
   "memberStandard": 28,
   "nsprefix": "sgmo",
   "nsuri": "http://www.sangamo.com/20200331",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "0001001 - Document - Cover",
     "role": "http://www.sangamo.com/role/Cover",
     "shortName": "Cover",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2115104 - Disclosure - BASIC AND DILUTED NET LOSS PER SHARE",
     "role": "http://www.sangamo.com/role/BASICANDDILUTEDNETLOSSPERSHARE",
     "shortName": "BASIC AND DILUTED NET LOSS PER SHARE",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CollaborativeArrangementDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2117105 - Disclosure - MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES",
     "role": "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCES",
     "shortName": "MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CollaborativeArrangementDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2121106 - Disclosure - INCOME TAXES",
     "role": "http://www.sangamo.com/role/INCOMETAXES",
     "shortName": "INCOME TAXES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2122107 - Disclosure - COMMITMENTS AND CONTINGENCIES",
     "role": "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIES",
     "shortName": "COMMITMENTS AND CONTINGENCIES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2126108 - Disclosure - STOCK-BASED COMPENSATION",
     "role": "http://www.sangamo.com/role/STOCKBASEDCOMPENSATION",
     "shortName": "STOCK-BASED COMPENSATION",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2129109 - Disclosure - STOCKHOLDERS' EQUITY",
     "role": "http://www.sangamo.com/role/STOCKHOLDERSEQUITY",
     "shortName": "STOCKHOLDERS' EQUITY",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2131110 - Disclosure - ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S.",
     "role": "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESAS",
     "shortName": "ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S.",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SubsequentEventsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2136111 - Disclosure - SUBSEQUENT EVENTS",
     "role": "http://www.sangamo.com/role/SUBSEQUENTEVENTS",
     "shortName": "SUBSEQUENT EVENTS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SubsequentEventsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2202201 - Disclosure - ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - (Policies)",
     "role": "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies",
     "shortName": "ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "sgmo:ScheduleOfRevenueFromStrategicPartneringCollaborationAgreementsAndResearchActivityGrantsAsAPercentageOfTotalRevenuesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2303301 - Disclosure - ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - (Tables)",
     "role": "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables",
     "shortName": "ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "sgmo:ScheduleOfRevenueFromStrategicPartneringCollaborationAgreementsAndResearchActivityGrantsAsAPercentageOfTotalRevenuesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1001002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEET",
     "role": "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET",
     "shortName": "CONDENSED CONSOLIDATED BALANCE SHEET",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2306302 - Disclosure - FAIR VALUE MEASUREMENTS - (Tables)",
     "role": "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSTables",
     "shortName": "FAIR VALUE MEASUREMENTS - (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:MarketableSecuritiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2311303 - Disclosure - CASH EQUIVALENTS AND MARKETABLE SECURITIES - (Tables)",
     "role": "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESTables",
     "shortName": "CASH EQUIVALENTS AND MARKETABLE SECURITIES - (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:MarketableSecuritiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i9fc0572525a94b25b7edb37462bdeeab_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2318304 - Disclosure - MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - (Tables)",
     "role": "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables",
     "shortName": "MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i9fc0572525a94b25b7edb37462bdeeab_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2323305 - Disclosure - COMMITMENTS AND CONTINGENCIES - (Tables)",
     "role": "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESTables",
     "shortName": "COMMITMENTS AND CONTINGENCIES - (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2327306 - Disclosure - STOCK-BASED COMPENSATION - (Tables)",
     "role": "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONTables",
     "shortName": "STOCK-BASED COMPENSATION - (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2332307 - Disclosure - ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - (Tables)",
     "role": "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASTables",
     "shortName": "ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2404401 - Disclosure - ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail",
     "shortName": "ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:LettersOfCreditOutstandingAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2407402 - Disclosure - FAIR VALUE MEASUREMENTS - Summary of Fair Value Measurements of Cash Equivalents, Available-for-Sale Marketable Securities and Free Share Asset/Liability (Detail)",
     "role": "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail",
     "shortName": "FAIR VALUE MEASUREMENTS - Summary of Fair Value Measurements of Cash Equivalents, Available-for-Sale Marketable Securities and Free Share Asset/Liability (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i8204dfcabc5b406786fbf641e3dbafda_I20200331",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "sgmo:BusinessAcquisitionNumberOfFreeSharesOutstandingSubjectToPurchase",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2408403 - Disclosure - FAIR VALUE MEASUREMENTS - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail",
     "shortName": "FAIR VALUE MEASUREMENTS - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "sgmo:BusinessAcquisitionNumberOfFreeSharesOutstandingSubjectToPurchase",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i204878f623a0428897fcd828d122fac5_I20200331",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:SharePrice",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2409404 - Disclosure - FAIR VALUE MEASUREMENTS - Summary of Estimated Fair Value of Free Shares Valuation Assumptions (Detail)",
     "role": "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail",
     "shortName": "FAIR VALUE MEASUREMENTS - Summary of Estimated Fair Value of Free Shares Valuation Assumptions (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i204878f623a0428897fcd828d122fac5_I20200331",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:SharePrice",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1002003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS",
     "role": "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
     "shortName": "CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:ResearchAndDevelopmentExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss",
       "ix:continuation",
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2412405 - Disclosure - CASH EQUIVALENTS AND MARKETABLE SECURITIES - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESAdditionalInformationDetail",
     "shortName": "CASH EQUIVALENTS AND MARKETABLE SECURITIES - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss",
       "ix:continuation",
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2413406 - Disclosure - CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Cash Equivalents and Available-for-Sale Securities (Detail)",
     "role": "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
     "shortName": "CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Cash Equivalents and Available-for-Sale Securities (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:MarketableSecuritiesTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2414407 - Disclosure - CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of cost and estimated fair value of short-term investments (Details)",
     "role": "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofcostandestimatedfairvalueofshortterminvestmentsDetails",
     "shortName": "CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of cost and estimated fair value of short-term investments (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2416408 - Disclosure - BASIC AND DILUTED NET LOSS PER SHARE - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/BASICANDDILUTEDNETLOSSPERSHAREAdditionalInformationDetail",
     "shortName": "BASIC AND DILUTED NET LOSS PER SHARE - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "idb7248ed05a747ff9896d533069b3875_D20190101-20190331",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "sgmo:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgressPercentage",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2419409 - Disclosure - MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
     "shortName": "MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "idb7248ed05a747ff9896d533069b3875_D20190101-20190331",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "sgmo:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgressPercentage",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2420410 - Disclosure - MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - Revenues Recognized under Agreement (Detail)",
     "role": "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail",
     "shortName": "MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - Revenues Recognized under Agreement (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i45479c84f8ca4dc484141eb701c3577d_D20200101-20200331",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2424411 - Disclosure - COMMITMENTS AND CONTINGENCIES - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail",
     "shortName": "COMMITMENTS AND CONTINGENCIES - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2425412 - Disclosure - COMMITMENTS AND CONTINGENCIES - Summary of Maturities of Operating Lease Liabilities (Detail)",
     "role": "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail",
     "shortName": "COMMITMENTS AND CONTINGENCIES - Summary of Maturities of Operating Lease Liabilities (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AllocatedShareBasedCompensationExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2428413 - Disclosure - STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Detail)",
     "role": "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONStockBasedCompensationExpenseDetail",
     "shortName": "STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AllocatedShareBasedCompensationExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i2a2d5599e26a4434a4896368372dfa1a_D20190401-20190430",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProceedsFromIssuanceOfCommonStock",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2430414 - Disclosure - STOCKHOLDERS' EQUITY - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail",
     "shortName": "STOCKHOLDERS' EQUITY - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i2a2d5599e26a4434a4896368372dfa1a_D20190401-20190430",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProceedsFromIssuanceOfCommonStock",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1003004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS",
     "role": "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS",
     "shortName": "CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:GoodwillImpairmentLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2433415 - Disclosure - ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
     "shortName": "ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:GoodwillImpairmentLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "ib56c1a2c39934e7faec54d0091b749b9_I20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:Goodwill",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2434416 - Disclosure - ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Summary of Estimated Fair Value of Net Assets Acquired (Detail)",
     "role": "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail",
     "shortName": "ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Summary of Estimated Fair Value of Net Assets Acquired (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i30d1770674bf4349b6838b86adf9f02c_D20181001-20181001",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:BusinessCombinationConsiderationTransferred1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i0dc097cef6b647b79391b94a22f3b816_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:MinorityInterest",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2435417 - Disclosure - ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Summary of Non-controlling Interest (Detail)",
     "role": "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofNoncontrollingInterestDetail",
     "shortName": "ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Summary of Non-controlling Interest (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i052c5dc81b734ffc9f3516a4db54bad2_D20200201-20200229",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProceedsFromCollaborators",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2437418 - Disclosure - SUBSEQUENT EVENTS - Additional Information (Detail)",
     "role": "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail",
     "shortName": "SUBSEQUENT EVENTS - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i39ae63a9fbc44b2cb1b2e33cd8ab0561_I20181231",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:CommonStockSharesIssued",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1004005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY",
     "role": "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY",
     "shortName": "CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i39ae63a9fbc44b2cb1b2e33cd8ab0561_I20181231",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:CommonStockSharesIssued",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1005006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS",
     "role": "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
     "shortName": "CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DepreciationDepletionAndAmortization",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2101101 - Disclosure - ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES",
     "role": "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES",
     "shortName": "ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2105102 - Disclosure - FAIR VALUE MEASUREMENTS",
     "role": "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTS",
     "shortName": "FAIR VALUE MEASUREMENTS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2110103 - Disclosure - CASH EQUIVALENTS AND MARKETABLE SECURITIES",
     "role": "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIES",
     "shortName": "CASH EQUIVALENTS AND MARKETABLE SECURITIES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "i67993c8f8f964b89901aef8957722a8e_D20200101-20200331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R9999": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "sgmo-20200331.htm",
      "contextRef": "id44f8cf971d6453c9d405f22bd50839a_I20190101",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "",
     "isDefault": "false",
     "longName": "Uncategorized Items - sgmo-20200331.htm",
     "role": "http://xbrl.sec.gov/role/uncategorizedFacts",
     "shortName": "Uncategorized Items - sgmo-20200331.htm",
     "subGroupType": "",
     "uniqueAnchor": null
    }
   },
   "segmentCount": 69,
   "tag": {
    "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",
        "verboseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CoverAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cover page.",
        "label": "Cover [Abstract]",
        "terseLabel": "Cover page."
       }
      }
     },
     "localname": "CoverAbstract",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "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",
        "terseLabel": "Current Fiscal Year End Date"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "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",
        "terseLabel": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in CCYY 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",
        "terseLabel": "Document Fiscal Year Focus"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentQuarterlyReport": {
     "auth_ref": [
      "r266"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an quarterly report.",
        "label": "Document Quarterly Report",
        "terseLabel": "Document Quarterly Report"
       }
      }
     },
     "localname": "DocumentQuarterlyReport",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r267"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report",
        "terseLabel": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "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",
        "verboseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "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",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r268"
     ],
     "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",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "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",
        "verboseLabel": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "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",
        "terseLabel": "Entity Current Reporting Status"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r268"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "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",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r268"
     ],
     "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",
        "terseLabel": "Entity Filer Category"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "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",
        "terseLabel": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r269"
     ],
     "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",
        "terseLabel": "Entity Interactive Data Current"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r268"
     ],
     "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",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r268"
     ],
     "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",
        "terseLabel": "Entity Shell Company"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r268"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business",
        "terseLabel": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r268"
     ],
     "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",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r264"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Title of 12(b) Security",
        "terseLabel": "Title of 12(b) Security"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r265"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol",
        "terseLabel": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.sangamo.com/role/Cover"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "sgmo_AchievementOfCommercialMilestonesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Achievement of Commercial Milestones.",
        "label": "Achievement Of Commercial Milestones [Member]",
        "verboseLabel": "Achievement of Commercial Milestones"
       }
      }
     },
     "localname": "AchievementOfCommercialMilestonesMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AchievementOfFirstCommercialSaleMilestonesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Achievement of first commercial sale milestones.",
        "label": "Achievement Of First Commercial Sale Milestones [Member]",
        "terseLabel": "Achievement of First Commercial Sale Milestones"
       }
      }
     },
     "localname": "AchievementOfFirstCommercialSaleMilestonesMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AchievementOfSpecifiedClinicalDevelopmentAndRegulatoryMilestonesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Achievement of Specified Clinical Development and Regulatory Milestones.",
        "label": "Achievement Of Specified Clinical Development And Regulatory Milestones [Member]",
        "terseLabel": "Achievement Of Specified Clinical Development And Regulatory Milestones"
       }
      }
     },
     "localname": "AchievementOfSpecifiedClinicalDevelopmentAndRegulatoryMilestonesMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AchievementOfSpecifiedClinicalDevelopmentIntellectualPropertyAndRegulatoryMilestonesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Achievement of specified clinical development intellectual property and regulatory milestones.",
        "label": "Achievement Of Specified Clinical Development Intellectual Property And Regulatory Milestones [Member]",
        "terseLabel": "Achievement of Specified Clinical Development Intellectual Property and Regulatory Milestones"
       }
      }
     },
     "localname": "AchievementOfSpecifiedClinicalDevelopmentIntellectualPropertyAndRegulatoryMilestonesMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AchievementOfSpecifiedPreclinicalDevelopmentClinicalDevelopmentAndFirstCommercialSaleMilestonesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Achievement of specified preclinical development clinical development and first commercial sale milestones.",
        "label": "Achievement Of Specified Preclinical Development Clinical Development And First Commercial Sale Milestones [Member]",
        "verboseLabel": "Achievement of Specified Preclinical Development Clinical Development and First Commercial Sale Milestones"
       }
      }
     },
     "localname": "AchievementOfSpecifiedPreclinicalDevelopmentClinicalDevelopmentAndFirstCommercialSaleMilestonesMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AchievementOfSpecifiedResearchClinicalDevelopmentRegulatoryAndFirstCommercialSaleMilestonesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Achievement of specified research, clinical development, regulatory and first commercial sale milestones.",
        "label": "Achievement Of Specified Research Clinical Development Regulatory And First Commercial Sale Milestones [Member]",
        "terseLabel": "Achievement of Specified Research, Clinical Development, Regulatory and First Commercial Sale Milestones"
       }
      }
     },
     "localname": "AchievementOfSpecifiedResearchClinicalDevelopmentRegulatoryAndFirstCommercialSaleMilestonesMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AchievementOfSpecifiedSalesBasedMilestonesIfAnnualWorldwideNetSalesOfLicensedProductsReachSpecifiedLevelsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Achievement of specified sales based milestones if annual worldwide net sales of licensed products reach specified levels.",
        "label": "Achievement Of Specified Sales Based Milestones If Annual Worldwide Net Sales Of Licensed Products Reach Specified Levels [Member]",
        "terseLabel": "Achievement of Specified Sales-based Milestones if Annual Worldwide Net Sales of Licensed Products Reach Specified Levels"
       }
      }
     },
     "localname": "AchievementOfSpecifiedSalesBasedMilestonesIfAnnualWorldwideNetSalesOfLicensedProductsReachSpecifiedLevelsMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AchievementOfSpecifiedSalesMilestonesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Achievement of Specified Sales Milestones.",
        "label": "Achievement Of Specified Sales Milestones [Member]",
        "terseLabel": "Achievement of Specified Sales Milestones"
       }
      }
     },
     "localname": "AchievementOfSpecifiedSalesMilestonesMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AggregateAdditionalRevenueRecognitionMilestoneMethodRevenueEligibleToReceive": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate additional revenue recognition milestone method revenue eligible to receive.",
        "label": "Aggregate Additional Revenue Recognition Milestone Method Revenue Eligible To Receive",
        "terseLabel": "Potential amount to be funded for achievement of specified commercialized and sales milestones"
       }
      }
     },
     "localname": "AggregateAdditionalRevenueRecognitionMilestoneMethodRevenueEligibleToReceive",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_AgreementTerminationTerm": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Agreement Termination, Term",
        "label": "Agreement Termination, Term",
        "terseLabel": "Agreement termination, term"
       }
      }
     },
     "localname": "AgreementTerminationTerm",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "sgmo_AmendedCollaborationAndLicenseAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amended Collaboration And License Agreement",
        "label": "Amended Collaboration And License Agreement [Member]",
        "terseLabel": "Amended Collaboration And License Agreement"
       }
      }
     },
     "localname": "AmendedCollaborationAndLicenseAgreementMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_AmortizationAndOtherChangesInRightOfUseAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortization And Other Changes In Right-of-Use Assets",
        "label": "Amortization And Other Changes In Right-of-Use Assets",
        "negatedLabel": "Amortization and other changes in right-of-use assets"
       }
      }
     },
     "localname": "AmortizationAndOtherChangesInRightOfUseAssets",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_BiogenMAIncMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Biogen MA, Inc.",
        "label": "Biogen MA, Inc. [Member]",
        "terseLabel": "Biogen MA, Inc."
       }
      }
     },
     "localname": "BiogenMAIncMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_BrisbaneCaliforniaMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Brisbane, California",
        "label": "Brisbane, California [Member]",
        "terseLabel": "Brisbane, California"
       }
      }
     },
     "localname": "BrisbaneCaliforniaMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_BusinessAcquisitionEstimatedFairValueAssetsOfFreeShares": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business acquisition estimated fair value assets of free shares.",
        "label": "Business Acquisition Estimated Fair Value Assets Of Free Shares",
        "terseLabel": "Estimated fair value asset of free shares"
       }
      }
     },
     "localname": "BusinessAcquisitionEstimatedFairValueAssetsOfFreeShares",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_BusinessAcquisitionEstimatedFairValueLiabilitiesOfFreeShares": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business acquisition estimated fair value liabilities of free shares.",
        "label": "Business Acquisition Estimated Fair Value Liabilities Of Free Shares",
        "terseLabel": "Estimated fair value liability of free shares"
       }
      }
     },
     "localname": "BusinessAcquisitionEstimatedFairValueLiabilitiesOfFreeShares",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_BusinessAcquisitionNumberOfFreeSharesHeldByHolders": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business acquisition, number of free shares held by the holders.",
        "label": "Business Acquisition Number Of Free Shares Held By Holders",
        "terseLabel": "Number of free shares held by the holders (in shares)"
       }
      }
     },
     "localname": "BusinessAcquisitionNumberOfFreeSharesHeldByHolders",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "sgmo_BusinessAcquisitionNumberOfFreeSharesOutstandingSubjectToPurchase": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business Acquisition, Number Of Free Shares Outstanding Subject To Purchase",
        "label": "Business Acquisition, Number Of Free Shares Outstanding Subject To Purchase",
        "terseLabel": "Number of free shares outstanding subject to purchase (in shares)"
       }
      }
     },
     "localname": "BusinessAcquisitionNumberOfFreeSharesOutstandingSubjectToPurchase",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "sgmo_BusinessAcquisitionNumberOfSharesAcquired": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business acquisition, number of shares acquired.",
        "label": "Business Acquisition Number Of Shares Acquired",
        "terseLabel": "Number of ordinary shares acquired (in shares)",
        "verboseLabel": "Number of shares acquired (in shares)"
       }
      }
     },
     "localname": "BusinessAcquisitionNumberOfSharesAcquired",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "sgmo_BusinessAcquisitionPercentageOfEquityInterestsAgreedToAcquire": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business acquisition, percentage of equity interests agreed to acquire.",
        "label": "Business Acquisition Percentage Of Equity Interests Agreed To Acquire",
        "terseLabel": "Percentage of equity interests agreed to acquire"
       }
      }
     },
     "localname": "BusinessAcquisitionPercentageOfEquityInterestsAgreedToAcquire",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "sgmo_CNineORFSevenTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "C nine ORF seven two.",
        "label": "C Nine O R F Seven Two [Member]",
        "verboseLabel": "C9ORF72"
       }
      }
     },
     "localname": "CNineORFSevenTwoMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_CaliforniaInstituteForRegenerativeMedicineAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "California institute for regenerative medicine agreement.",
        "label": "California Institute For Regenerative Medicine Agreement [Member]",
        "terseLabel": "California Institute For Regenerative Medicine Agreement"
       }
      }
     },
     "localname": "CaliforniaInstituteForRegenerativeMedicineAgreementMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_CashEquivalentsAndAvailableForSaleSecurities": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 3.0,
       "parentTag": "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash equivalents and available for sale securities.",
        "label": "Cash Equivalents And Available For Sale Securities",
        "totalLabel": "Total cash equivalents and available-for-sale securities, Estimated Fair Value"
       }
      }
     },
     "localname": "CashEquivalentsAndAvailableForSaleSecurities",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash equivalents and available for Sale Securities Amortized Cost",
        "label": "Cash Equivalents And Available For Sale Securities Amortized Cost",
        "totalLabel": "Total cash equivalents and available-for-sale securities, Amortized Cost"
       }
      }
     },
     "localname": "CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedGainBeforeTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 1.0,
       "parentTag": "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash equivalents and available for sale securities, gross unrealized gain, before tax.",
        "label": "Cash Equivalents And Available For Sale Securities Gross Unrealized Gain Before Tax",
        "totalLabel": "Total cash equivalents and available-for-sale securities, Gross Unrealized Gains"
       }
      }
     },
     "localname": "CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedGainBeforeTax",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedLossBeforeTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 2.0,
       "parentTag": "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash equivalents and available for sale securities, gross unrealized loss, before Tax",
        "label": "Cash Equivalents And Available For Sale Securities Gross Unrealized Loss Before Tax",
        "negatedTotalLabel": "Total cash equivalents and available-for-sale securities, Gross Unrealized (Losses)"
       }
      }
     },
     "localname": "CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedLossBeforeTax",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CashEquivalentsGrossUnrealizedGainBeforeTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 1.0,
       "parentTag": "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedGainBeforeTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash Equivalents Gross Unrealized Gain Before Tax",
        "label": "Cash Equivalents Gross Unrealized Gain Before Tax",
        "terseLabel": "Cash equivalents, Gross Unrealized Gains"
       }
      }
     },
     "localname": "CashEquivalentsGrossUnrealizedGainBeforeTax",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CashEquivalentsGrossUnrealizedLossBeforeTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_CashAndCashEquivalentsAtCarryingValue",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash Equivalents, Gross Unrealized Loss, Before Tax",
        "label": "Cash Equivalents, Gross Unrealized Loss, Before Tax",
        "negatedTerseLabel": "Cash equivalents, Gross Unrealized (Losses)"
       }
      }
     },
     "localname": "CashEquivalentsGrossUnrealizedLossBeforeTax",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_ChangeInCollaborationAgreementScopeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Change In Collaboration Agreement Scope [Member]",
        "label": "Change In Collaboration Agreement Scope [Member]",
        "terseLabel": "Change in Collaboration Agreement Scope"
       }
      }
     },
     "localname": "ChangeInCollaborationAgreementScopeMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_CollaborationAgreementNumberOfAdditionalProductTargets": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaboration Agreement, Number Of Additional Product Targets",
        "label": "Collaboration Agreement, Number Of Additional Product Targets",
        "terseLabel": "Number of additional product targets"
       }
      }
     },
     "localname": "CollaborationAgreementNumberOfAdditionalProductTargets",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "sgmo_CollaborationAgreementTargetSelectionPeriod": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaboration Agreement, Target Selection Period",
        "label": "Collaboration Agreement, Target Selection Period",
        "terseLabel": "Target selection period"
       }
      }
     },
     "localname": "CollaborationAgreementTargetSelectionPeriod",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "sgmo_CollaborationAndLicenseAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaboration and license agreement.",
        "label": "Collaboration And License Agreement [Member]",
        "terseLabel": "Collaboration And License Agreement",
        "verboseLabel": "Collaboration and License Agreement"
       }
      }
     },
     "localname": "CollaborationAndLicenseAgreementMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_CollaborationAndLicenseAgreementsNumberOfProductsApprovedUnderAgreement": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaboration and license agreements number of products approved under agreement.",
        "label": "Collaboration And License Agreements Number Of Products Approved Under Agreement",
        "terseLabel": "Number of products approved"
       }
      }
     },
     "localname": "CollaborationAndLicenseAgreementsNumberOfProductsApprovedUnderAgreement",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "sgmo_CollaborativeAgreementMilestoneAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Agreement Milestone",
        "label": "Collaborative Agreement Milestone [Axis]",
        "terseLabel": "Collaborative Agreement Milestone [Axis]"
       }
      }
     },
     "localname": "CollaborativeAgreementMilestoneAxis",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "sgmo_CollaborativeAgreementMilestoneDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Agreement Milestone",
        "label": "Collaborative Agreement Milestone [Domain]",
        "terseLabel": "Collaborative Agreement Milestone [Domain]"
       }
      }
     },
     "localname": "CollaborativeAgreementMilestoneDomain",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_CollaborativeArrangementAgreementRestrictionPercentageOfSharesHeld": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Agreement Restriction, Percentage Of Shares Held",
        "label": "Collaborative Arrangement, Agreement Restriction, Percentage Of Shares Held",
        "terseLabel": "Agreement restriction, percentage of shares held"
       }
      }
     },
     "localname": "CollaborativeArrangementAgreementRestrictionPercentageOfSharesHeld",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "sgmo_CollaborativeArrangementCumulativeMilestoneAchieved": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Cumulative Milestone Achieved",
        "label": "Collaborative Arrangement, Cumulative Milestone Achieved",
        "terseLabel": "Cumulative milestone achieved"
       }
      }
     },
     "localname": "CollaborativeArrangementCumulativeMilestoneAchieved",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementEstimatedReimbursableServiceCosts": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative arrangement estimated reimbursable service costs.",
        "label": "Collaborative Arrangement Estimated Reimbursable Service Costs",
        "terseLabel": "Collaborative arrangement estimated reimbursable service costs"
       }
      }
     },
     "localname": "CollaborativeArrangementEstimatedReimbursableServiceCosts",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementEstimatedReimbursableServiceCostsForNewResearchPlan": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement Estimated Reimbursable Service Costs For New Research Plan",
        "label": "Collaborative Arrangement Estimated Reimbursable Service Costs For New Research Plan",
        "terseLabel": "Collaborative arrangement estimated reimbursable service costs for new research plan"
       }
      }
     },
     "localname": "CollaborativeArrangementEstimatedReimbursableServiceCostsForNewResearchPlan",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementIncreaseDecreaseInNetIncomeLoss": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Increase (Decrease) In Net Income (Loss)",
        "label": "Collaborative Arrangement, Increase (Decrease) In Net Income (Loss)",
        "terseLabel": "Increase (decrease) in net loss"
       }
      }
     },
     "localname": "CollaborativeArrangementIncreaseDecreaseInNetIncomeLoss",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementIncreaseDecreaseInRevenue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Increase (Decrease) In Revenue",
        "label": "Collaborative Arrangement, Increase (Decrease) In Revenue",
        "terseLabel": "Increase (decrease) in revenue"
       }
      }
     },
     "localname": "CollaborativeArrangementIncreaseDecreaseInRevenue",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementMaximumMilestonePaymentReceivable": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Maximum Milestone Payment Receivable",
        "label": "Collaborative Arrangement, Maximum Milestone Payment Receivable",
        "terseLabel": "Maximum milestone payment receivable"
       }
      }
     },
     "localname": "CollaborativeArrangementMaximumMilestonePaymentReceivable",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementMilestoneRevenueReversal": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Milestone Revenue Reversal",
        "label": "Collaborative Arrangement, Milestone Revenue Reversal",
        "terseLabel": "Milestone revenue reversal"
       }
      }
     },
     "localname": "CollaborativeArrangementMilestoneRevenueReversal",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementNetIncomeLossPerShare": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Net Income (Loss) Per Share",
        "label": "Collaborative Arrangement, Net Income (Loss) Per Share",
        "terseLabel": "Increase (decrease) in basic net loss per share (in dollars per share)"
       }
      }
     },
     "localname": "CollaborativeArrangementNetIncomeLossPerShare",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "sgmo_CollaborativeArrangementNumberOfProductTargets": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Number Of Product Targets",
        "label": "Collaborative Arrangement, Number Of Product Targets",
        "terseLabel": "Number of product targets"
       }
      }
     },
     "localname": "CollaborativeArrangementNumberOfProductTargets",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "sgmo_CollaborativeArrangementNumberOfProductTargetsSelected": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Number Of Product Targets Selected",
        "label": "Collaborative Arrangement, Number Of Product Targets Selected",
        "terseLabel": "Number of product targets selected"
       }
      }
     },
     "localname": "CollaborativeArrangementNumberOfProductTargetsSelected",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "sgmo_CollaborativeArrangementResearchServiceFees": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Research Service Fees",
        "label": "Collaborative Arrangement, Research Service Fees",
        "terseLabel": "Research Service Fees"
       }
      }
     },
     "localname": "CollaborativeArrangementResearchServiceFees",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementStandstillRestrictionOwnershipThresholdPercentageOwnershipPercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Standstill Restriction, Ownership Threshold Percentage Ownership Percentage",
        "label": "Collaborative Arrangement, Standstill Restriction, Ownership Threshold Percentage Ownership Percentage",
        "terseLabel": "Standstill restriction, ownership threshold percentage ownership percentage"
       }
      }
     },
     "localname": "CollaborativeArrangementStandstillRestrictionOwnershipThresholdPercentageOwnershipPercentage",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "sgmo_CollaborativeArrangementStandstillRestrictionPeriod": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Standstill Restriction Period",
        "label": "Collaborative Arrangement, Standstill Restriction Period",
        "terseLabel": "Standstill restriction period"
       }
      }
     },
     "localname": "CollaborativeArrangementStandstillRestrictionPeriod",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "sgmo_CollaborativeArrangementTransactionPrice": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative arrangement transaction price.",
        "label": "Collaborative Arrangement Transaction Price",
        "terseLabel": "Collaborative arrangement transaction price"
       }
      }
     },
     "localname": "CollaborativeArrangementTransactionPrice",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_CollaborativeArrangementVotingProvisionsExpirationPeriod": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Voting Provisions Expiration Period",
        "label": "Collaborative Arrangement, Voting Provisions Expiration Period",
        "terseLabel": "Voting provisions expiration period"
       }
      }
     },
     "localname": "CollaborativeArrangementVotingProvisionsExpirationPeriod",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "sgmo_CollaborativeArrangementVotingProvisionsOwnershipThresholdPercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative Arrangement, Voting Provisions, Ownership Threshold Percentage",
        "label": "Collaborative Arrangement, Voting Provisions, Ownership Threshold Percentage",
        "terseLabel": "Voting provisions, ownership threshold percentage"
       }
      }
     },
     "localname": "CollaborativeArrangementVotingProvisionsOwnershipThresholdPercentage",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "sgmo_CommitmentsAndContingenciesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commitments and contingencies.",
        "label": "Commitments And Contingencies [Line Items]",
        "terseLabel": "Commitments And Contingencies [Line Items]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesLineItems",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "sgmo_CommitmentsAndContingenciesTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commitments and contingencies.",
        "label": "Commitments And Contingencies [Table]",
        "terseLabel": "Commitments And Contingencies [Table]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesTable",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "sgmo_ContingentDevelopmentAndSalesBasedMilestonePaymentsToBeReceived": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contingent development and sales based milestone payments to be received.",
        "label": "Contingent Development And Sales Based Milestone Payments To Be Received",
        "terseLabel": "Contingent development - and sales-based milestone payments to be received"
       }
      }
     },
     "localname": "ContingentDevelopmentAndSalesBasedMilestonePaymentsToBeReceived",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgressPercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress, Percentage",
        "label": "Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress, Percentage",
        "terseLabel": "Revenue reduction due to decrease in measure of proportional cumulative performance, percentage"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgressPercentage",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "sgmo_CustomerContractLiabilityMilestonePaymentEligibleToReceive": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Customer contract liability milestone payment eligible to receive.",
        "label": "Customer Contract Liability Milestone Payment Eligible To Receive",
        "terseLabel": "Development and sales-based milestone payments to be received"
       }
      }
     },
     "localname": "CustomerContractLiabilityMilestonePaymentEligibleToReceive",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_ExtendedResearchTermOfAgreement": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Extended Research Term Of Agreement",
        "label": "Extended Research Term Of Agreement",
        "terseLabel": "Extended research term of agreement"
       }
      }
     },
     "localname": "ExtendedResearchTermOfAgreement",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "sgmo_FreeSharesAssetMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Free shares asset.",
        "label": "Free Shares Asset [Member]",
        "terseLabel": "Free shares asset"
       }
      }
     },
     "localname": "FreeSharesAssetMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_FreeSharesLiabilityMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Free shares liability.",
        "label": "Free Shares Liability [Member]",
        "terseLabel": "Free shares asset"
       }
      }
     },
     "localname": "FreeSharesLiabilityMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_GainLossOnFreeShares": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Gain (loss) on free shares.",
        "label": "Gain (Loss) On Free Shares",
        "negatedLabel": "Loss (gain) on free shares"
       }
      }
     },
     "localname": "GainLossOnFreeShares",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_GrantFundingAmount": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Grant funding amount.",
        "label": "Grant Funding Amount",
        "terseLabel": "Funds due under the agreement"
       }
      }
     },
     "localname": "GrantFundingAmount",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_IncreaseDecreaseInLongTermPortionOfLeaseLiabilities": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 16.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Increase (decrease) in long-term portion of lease liabilities.",
        "label": "Increase Decrease In Long Term Portion Of Lease Liabilities",
        "terseLabel": "Long-term portion of lease liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInLongTermPortionOfLeaseLiabilities",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_InitialResearchTermOfAgreement": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Initial research term of agreement.",
        "label": "Initial Research Term Of Agreement",
        "terseLabel": "Initial research term of agreement"
       }
      }
     },
     "localname": "InitialResearchTermOfAgreement",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "sgmo_KitePharmaIncMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Kite Pharma Inc.",
        "label": "Kite Pharma Inc [Member]",
        "terseLabel": "Kite Pharma Inc"
       }
      }
     },
     "localname": "KitePharmaIncMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_MeasurementInputExchangeRateMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement Input, Exchange Rate [Member]",
        "label": "Measurement Input, Exchange Rate [Member]",
        "terseLabel": "Exchange Rate"
       }
      }
     },
     "localname": "MeasurementInputExchangeRateMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_MeasurementInputStockPriceCorrelationMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement Input, Stock Price Correlation [Member]",
        "label": "Measurement Input, Stock Price Correlation [Member]",
        "terseLabel": "Stock Price Correlation"
       }
      }
     },
     "localname": "MeasurementInputStockPriceCorrelationMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_MilestoneAchievementMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Milestone Achievement",
        "label": "Milestone Achievement [Member]",
        "terseLabel": "Milestone Achievement"
       }
      }
     },
     "localname": "MilestoneAchievementMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_MilestonePaymentsReceived": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Milestone payments received.",
        "label": "Milestone Payments Received",
        "terseLabel": "Milestone payments received"
       }
      }
     },
     "localname": "MilestonePaymentsReceived",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_MilestoneRevenueReceivable": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Milestone\u200b revenue receivable.",
        "label": "Milestone Revenue Receivable",
        "terseLabel": "Milestone revenue receivable"
       }
      }
     },
     "localname": "MilestoneRevenueReceivable",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_MilestoneThreeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Milestone Three",
        "label": "Milestone Three [Member]",
        "terseLabel": "Milestone Three"
       }
      }
     },
     "localname": "MilestoneThreeMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_MilestoneTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Milestone Two",
        "label": "Milestone Two [Member]",
        "terseLabel": "Milestone Two"
       }
      }
     },
     "localname": "MilestoneTwoMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_NumberOfClinicalOrRegulatoryMilestonesIncludedInTransactionPrice": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of clinical or regulatory milestones included in transaction price.",
        "label": "Number Of Clinical Or Regulatory Milestones Included In Transaction Price",
        "terseLabel": "Number of milestones included in transaction price"
       }
      }
     },
     "localname": "NumberOfClinicalOrRegulatoryMilestonesIncludedInTransactionPrice",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "sgmo_NumberOfOptionsToExtendInitialResearchTerm": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number Of Options To Extend Initial Research Term",
        "label": "Number Of Options To Extend Initial Research Term",
        "terseLabel": "Number of options to extend initial research term"
       }
      }
     },
     "localname": "NumberOfOptionsToExtendInitialResearchTerm",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "sgmo_NumberOfResearchProgram": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of research program.",
        "label": "Number Of Research Program",
        "terseLabel": "Number of research programs"
       }
      }
     },
     "localname": "NumberOfResearchProgram",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "sgmo_OfficeAndLaboratoryMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Office and laboratory.",
        "label": "Office And Laboratory [Member]",
        "terseLabel": "Office and Laboratory"
       }
      }
     },
     "localname": "OfficeAndLaboratoryMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_OrganizationAndSummaryOfSignificantAccountingPoliciesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Organization and summary of significant accounting policies.",
        "label": "Organization And Summary Of Significant Accounting Policies [Line Items]",
        "terseLabel": "Organization And Summary Of Significant Accounting Policies [Line Items]"
       }
      }
     },
     "localname": "OrganizationAndSummaryOfSignificantAccountingPoliciesLineItems",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "sgmo_OrganizationAndSummaryOfSignificantAccountingPoliciesTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Organization and summary of significant accounting policies.",
        "label": "Organization And Summary Of Significant Accounting Policies [Table]",
        "terseLabel": "Organization And Summary Of Significant Accounting Policies [Table]"
       }
      }
     },
     "localname": "OrganizationAndSummaryOfSignificantAccountingPoliciesTable",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "sgmo_OtherProductsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other products.",
        "label": "Other Products [Member]",
        "terseLabel": "Other Products"
       }
      }
     },
     "localname": "OtherProductsMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_PfizerMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Pfizer.",
        "label": "Pfizer [Member]",
        "terseLabel": "Pfizer"
       }
      }
     },
     "localname": "PfizerMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_PfizerSB525Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Pfizer SB-525 [Member]",
        "label": "Pfizer SB-525 [Member]",
        "terseLabel": "Pfizer SB-525"
       }
      }
     },
     "localname": "PfizerSB525Member",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_PreApprovalMilestoneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Pre-approval Milestone",
        "label": "Pre-approval Milestone [Member]",
        "terseLabel": "Pre-approval Milestone"
       }
      }
     },
     "localname": "PreApprovalMilestoneMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_PropertySubjectToOperatingLeaseOneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Property subject to operating lease one.",
        "label": "Property Subject To Operating Lease One [Member]",
        "terseLabel": "Operating Lease One"
       }
      }
     },
     "localname": "PropertySubjectToOperatingLeaseOneMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_ResearchAndDevelopmentArrangementContractToPerformForOthersCumulativeCompensationEarned": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Research and Development Arrangement, Contract to Perform for Others, Cumulative Compensation Earned",
        "label": "Research and Development Arrangement, Contract to Perform for Others, Cumulative Compensation Earned",
        "terseLabel": "Contract to perform for others, cumulative compensation earned"
       }
      }
     },
     "localname": "ResearchAndDevelopmentArrangementContractToPerformForOthersCumulativeCompensationEarned",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_ResearchAndOfficeSpaceMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Research and office space",
        "label": "Research And Office Space [Member]",
        "terseLabel": "Research and Office Space"
       }
      }
     },
     "localname": "ResearchAndOfficeSpaceMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_ResearchServicesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Research services.",
        "label": "Research Services [Member]",
        "terseLabel": "Research Services"
       }
      }
     },
     "localname": "ResearchServicesMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_RichmondCaliforniaMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Richmond, California",
        "label": "Richmond, California [Member]",
        "terseLabel": "Richmond, California"
       }
      }
     },
     "localname": "RichmondCaliforniaMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_SBFiveTwoFiveMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "SB five two five.",
        "label": "S B Five Two Five [Member]",
        "terseLabel": "SB-525"
       }
      }
     },
     "localname": "SBFiveTwoFiveMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_ST40BetaThalassemiaPhase1ClinicalTrialMilestoneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "ST-40 Beta Thalassemia Phase 1 Clinical Trial Milestone",
        "label": "ST-40 Beta Thalassemia Phase 1 Clinical Trial Milestone [Member]",
        "terseLabel": "ST-40 Beta Thalassemia Phase 1 Clinical Trial Milestone"
       }
      }
     },
     "localname": "ST40BetaThalassemiaPhase1ClinicalTrialMilestoneMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_SalesBasedMilestoneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sales-based Milestone",
        "label": "Sales-based Milestone [Member]",
        "terseLabel": "Sales-based Milestone"
       }
      }
     },
     "localname": "SalesBasedMilestoneMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_SangamoFranceMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sangamo France",
        "label": "Sangamo France [Member]",
        "terseLabel": "Sangamo France"
       }
      }
     },
     "localname": "SangamoFranceMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_SanofiMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sanofi.",
        "label": "Sanofi [Member]",
        "verboseLabel": "Sanofi"
       }
      }
     },
     "localname": "SanofiMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_ScheduleOfNoncontrollingInterestTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of noncontrolling interest.",
        "label": "Schedule Of Noncontrolling Interest Table [Text Block]",
        "terseLabel": "Summary of Non-controlling Interest"
       }
      }
     },
     "localname": "ScheduleOfNoncontrollingInterestTableTextBlock",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "sgmo_ScheduleOfRevenueFromStrategicPartneringCollaborationAgreementsAndResearchActivityGrantsAsAPercentageOfTotalRevenuesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule Of Revenue From Strategic Partnering Collaboration Agreements And Research Activity Grants As A Percentage Of Total Revenues",
        "label": "Schedule Of Revenue From Strategic Partnering Collaboration Agreements And Research Activity Grants As A Percentage Of Total Revenues [Table Text Block]",
        "terseLabel": "Schedule of Revenue from Strategic Partnering Collaboration Agreements and Research Activity Grants as a Percentage of Total Revenues"
       }
      }
     },
     "localname": "ScheduleOfRevenueFromStrategicPartneringCollaborationAgreementsAndResearchActivityGrantsAsAPercentageOfTotalRevenuesTableTextBlock",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "sgmo_SeparateUpfrontFee": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Separate upfront fee.",
        "label": "Separate Upfront Fee",
        "terseLabel": "Separate upfront fee"
       }
      }
     },
     "localname": "SeparateUpfrontFee",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "sgmo_SharePurchaseAgreementAndTenderOfferAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Share purchase agreement and tender offer agreement.",
        "label": "Share Purchase Agreement And Tender Offer Agreement [Member]",
        "terseLabel": "Share Purchase Agreement and Tender Offer Agreement"
       }
      }
     },
     "localname": "SharePurchaseAgreementAndTenderOfferAgreementMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_StockPurchaseAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock Purchase Agreement",
        "label": "Stock Purchase Agreement [Member]",
        "terseLabel": "Stock Purchase Agreement"
       }
      }
     },
     "localname": "StockPurchaseAgreementMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "sgmo_ValbonneFranceMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Valbonne, France",
        "label": "Valbonne, France [Member]",
        "terseLabel": "Valbonne, France"
       }
      }
     },
     "localname": "ValbonneFranceMember",
     "nsuri": "http://www.sangamo.com/20200331",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CounterpartyNameAxis": {
     "auth_ref": [
      "r34",
      "r69"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Counterparty Name [Axis]",
        "terseLabel": "Counterparty Name"
       }
      }
     },
     "localname": "CounterpartyNameAxis",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Maximum [Member]",
        "terseLabel": "Maximum"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Minimum [Member]",
        "terseLabel": "Minimum"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_OwnershipAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Ownership [Axis]",
        "terseLabel": "Ownership [Axis]"
       }
      }
     },
     "localname": "OwnershipAxis",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_OwnershipDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Ownership [Domain]",
        "terseLabel": "Ownership [Domain]"
       }
      }
     },
     "localname": "OwnershipDomain",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ProductOrServiceAxis": {
     "auth_ref": [
      "r95",
      "r144",
      "r146",
      "r257"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Product and Service [Axis]",
        "terseLabel": "Product and Service"
       }
      }
     },
     "localname": "ProductOrServiceAxis",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ProductsAndServicesDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Product and Service [Domain]",
        "terseLabel": "Product and Service"
       }
      }
     },
     "localname": "ProductsAndServicesDomain",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Range [Axis]",
        "terseLabel": "Range",
        "verboseLabel": "Range"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Range [Domain]",
        "terseLabel": "Range",
        "verboseLabel": "Range"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RepurchaseAgreementCounterpartyNameDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Counterparty Name [Domain]",
        "terseLabel": "Counterparty Name"
       }
      }
     },
     "localname": "RepurchaseAgreementCounterpartyNameDomain",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_SegmentGeographicalDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Geographical [Domain]",
        "terseLabel": "Geographical [Domain]"
       }
      }
     },
     "localname": "SegmentGeographicalDomain",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_StatementGeographicalAxis": {
     "auth_ref": [
      "r96",
      "r144",
      "r147",
      "r260",
      "r262"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Geographical [Axis]",
        "terseLabel": "Geographical [Axis]"
       }
      }
     },
     "localname": "StatementGeographicalAxis",
     "nsuri": "http://fasb.org/srt/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountingPoliciesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Accounting Policies [Abstract]",
        "terseLabel": "Accounting Policies [Abstract]"
       }
      }
     },
     "localname": "AccountingPoliciesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent": {
     "auth_ref": [
      "r24"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.",
        "label": "Accounts Payable and Accrued Liabilities, Current",
        "terseLabel": "Accounts payable and accrued liabilities"
       }
      }
     },
     "localname": "AccountsPayableAndAccruedLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccountsReceivableNetCurrent": {
     "auth_ref": [
      "r13",
      "r145"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 4.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.",
        "label": "Accounts Receivable, Net, Current",
        "terseLabel": "Accounts receivable"
       }
      }
     },
     "localname": "AccountsReceivableNetCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.",
        "label": "Accretion (Amortization) of Discounts and Premiums, Investments",
        "negatedLabel": "Amortization of discount on marketable securities"
       }
      }
     },
     "localname": "AccretionAmortizationOfDiscountsAndPremiumsInvestments",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccruedEmployeeBenefitsCurrent": {
     "auth_ref": [
      "r5",
      "r6",
      "r26"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Accrued Employee Benefits, Current",
        "terseLabel": "Accrued compensation and employee benefits"
       }
      }
     },
     "localname": "AccruedEmployeeBenefitsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r38",
      "r40",
      "r41"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 5.0,
       "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 Income (Loss), Net of Tax",
        "terseLabel": "Accumulated other comprehensive loss"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [
      "r37",
      "r41",
      "r42",
      "r194"
     ],
     "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]",
        "terseLabel": "Accumulated Other Comprehensive Loss"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdditionalPaidInCapitalCommonStock": {
     "auth_ref": [
      "r14"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 3.0,
       "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, Common Stock",
        "terseLabel": "Additional paid-in capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [],
     "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]",
        "terseLabel": "Additional Paid-in Capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": {
     "auth_ref": [
      "r152",
      "r153",
      "r161",
      "r162"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.",
        "label": "Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition",
        "terseLabel": "Stock-based compensation"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts": {
     "auth_ref": [
      "r135",
      "r136"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.",
        "label": "Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs",
        "negatedLabel": "Issuance costs related to public offering"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]",
        "terseLabel": "Adjustments to reconcile net loss to net cash used in operating activities:"
       }
      }
     },
     "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AllocatedShareBasedCompensationExpense": {
     "auth_ref": [
      "r153",
      "r158",
      "r160"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.",
        "label": "Allocated Share-based Compensation Expense",
        "terseLabel": "Total stock-based compensation expense"
       }
      }
     },
     "localname": "AllocatedShareBasedCompensationExpense",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONStockBasedCompensationExpenseDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": {
     "auth_ref": [
      "r74"
     ],
     "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": "Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount",
        "terseLabel": "Stock options and RSUs outstanding (in shares)"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/BASICANDDILUTEDNETLOSSPERSHAREAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ArrangementsAndNonarrangementTransactionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item is to be populated with the collective of (i) types (categories) of arrangements of the entity applicable to its revenue-generating activities or operations and non-arrangement transactions, including but not limited to, for instance, sales of product manufactured by the entity, if such comparison of arrangements as a component of all transactions is provided by the entity.",
        "label": "Arrangements and Non-arrangement Transactions [Domain]",
        "terseLabel": "Arrangements and Non-arrangement Transactions"
       }
      }
     },
     "localname": "ArrangementsAndNonarrangementTransactionsMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r93",
      "r239",
      "r250"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "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": "Assets",
        "totalLabel": "Total assets"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Assets [Abstract]",
        "terseLabel": "ASSETS"
       }
      }
     },
     "localname": "AssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssetsCurrent": {
     "auth_ref": [
      "r2",
      "r3",
      "r33"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 1.0,
       "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": "Assets, Current",
        "totalLabel": "Total current assets"
       }
      }
     },
     "localname": "AssetsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsCurrentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Assets, Current [Abstract]",
        "terseLabel": "Current assets:"
       }
      }
     },
     "localname": "AssetsCurrentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssetsFairValueDisclosure": {
     "auth_ref": [
      "r200"
     ],
     "calculation": {
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "Assets, Fair Value Disclosure",
        "terseLabel": "Fair value disclosure",
        "totalLabel": "Total cash equivalents and marketable securities and free shares asset"
       }
      }
     },
     "localname": "AssetsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 2.0,
       "parentTag": "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedGainBeforeTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax",
        "terseLabel": "Available-for-sale securities, Gross Unrealized Gains"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax": {
     "auth_ref": [
      "r106"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 2.0,
       "parentTag": "sgmo_CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedLossBeforeTax",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax",
        "negatedLabel": "Available-for-sale securities, Gross Unrealized (Losses)"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis": {
     "auth_ref": [
      "r103"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Amortized Cost",
        "totalLabel": "Available-for-sale securities, Amortized Cost"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost": {
     "auth_ref": [
      "r109"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofcostandestimatedfairvalueofshortterminvestmentsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost",
        "verboseLabel": "Maturing after one year through five years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofcostandestimatedfairvalueofshortterminvestmentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost": {
     "auth_ref": [
      "r108"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofcostandestimatedfairvalueofshortterminvestmentsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost",
        "verboseLabel": "Maturing in one year or less"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofcostandestimatedfairvalueofshortterminvestmentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtSecurities": {
     "auth_ref": [
      "r99",
      "r104"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      },
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofcostandestimatedfairvalueofshortterminvestmentsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_AssetsFairValueDisclosure",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale",
        "terseLabel": "Total marketable securities",
        "totalLabel": "Total",
        "verboseLabel": "Available-for-sale securities, Estimated Fair Value"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtSecurities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofcostandestimatedfairvalueofshortterminvestmentsDetails",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent": {
     "auth_ref": [
      "r101"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 2.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.",
        "label": "Debt Securities, Available-for-sale, Current",
        "terseLabel": "Marketable securities"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtSecuritiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent": {
     "auth_ref": [
      "r101"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 2.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in net income (available-for-sale), classified as noncurrent.",
        "label": "Debt Securities, Available-for-sale, Noncurrent",
        "terseLabel": "Marketable securities, non-current"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtSecuritiesNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BasisOfAccountingPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).",
        "label": "Basis of Accounting, Policy [Policy Text Block]",
        "terseLabel": "Basis of Presentation"
       }
      }
     },
     "localname": "BasisOfAccountingPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BusinessAcquisitionAcquireeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.",
        "label": "Business Acquisition, Acquiree [Domain]",
        "terseLabel": "Business Acquisition, Acquiree"
       }
      }
     },
     "localname": "BusinessAcquisitionAcquireeDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BusinessAcquisitionAxis": {
     "auth_ref": [
      "r174",
      "r175"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by business combination or series of individually immaterial business combinations.",
        "label": "Business Acquisition [Axis]",
        "terseLabel": "Business Acquisition"
       }
      }
     },
     "localname": "BusinessAcquisitionAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessAcquisitionLineItems": {
     "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": "Business Acquisition [Line Items]",
        "terseLabel": "Business Acquisition [Line Items]"
       }
      }
     },
     "localname": "BusinessAcquisitionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired": {
     "auth_ref": [
      "r173"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of voting equity interests acquired at the acquisition date in the business combination.",
        "label": "Business Acquisition, Percentage of Voting Interests Acquired",
        "terseLabel": "Business acquisition, percentage of voting interests acquired"
       }
      }
     },
     "localname": "BusinessAcquisitionPercentageOfVotingInterestsAcquired",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_BusinessAcquisitionSharePrice": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.",
        "label": "Business Acquisition, Share Price",
        "terseLabel": "Sangamo France Stock Price (EUR) (in euros per share)",
        "verboseLabel": "Business acquisition, share price (in dollars per share)"
       }
      }
     },
     "localname": "BusinessAcquisitionSharePrice",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue": {
     "auth_ref": [
      "r178"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.",
        "label": "Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value",
        "terseLabel": "Fair value of non-controlling interest"
       }
      }
     },
     "localname": "BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationConsiderationTransferred1": {
     "auth_ref": [
      "r180",
      "r181",
      "r182"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.",
        "label": "Business Combination, Consideration Transferred",
        "terseLabel": "Consideration transferred"
       }
      }
     },
     "localname": "BusinessCombinationConsiderationTransferred1",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationDisclosureTextBlock": {
     "auth_ref": [
      "r183"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).",
        "label": "Business Combination Disclosure [Text Block]",
        "terseLabel": "ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S."
       }
      }
     },
     "localname": "BusinessCombinationDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESAS"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents": {
     "auth_ref": [
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "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, acquired at the acquisition date. 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.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents",
        "terseLabel": "Cash"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets": {
     "auth_ref": [
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets",
        "terseLabel": "Current assets"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities": {
     "auth_ref": [
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 6.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities",
        "negatedLabel": "Current liabilities"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities": {
     "auth_ref": [
      "r168",
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 8.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities",
        "negatedLabel": "Deferred tax liability, net"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles": {
     "auth_ref": [
      "r176",
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 4.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of identifiable intangible assets recognized as of the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles",
        "terseLabel": "IPR&amp;D"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities": {
     "auth_ref": [
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 7.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities assumed at the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities",
        "negatedLabel": "Assumed debt liabilities"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet": {
     "auth_ref": [
      "r176",
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net",
        "totalLabel": "Fair value of net identifiable assets acquired"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets": {
     "auth_ref": [
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 5.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets",
        "terseLabel": "Other assets"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment": {
     "auth_ref": [
      "r176",
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of property, plant, and equipment recognized as of the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment",
        "terseLabel": "Property and equipment"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet": {
     "auth_ref": [
      "r177"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net",
        "terseLabel": "Fair value of Sangamo France",
        "totalLabel": "Total fair value of net assets acquired"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Business Combinations [Abstract]",
        "terseLabel": "Business Combinations [Abstract]"
       }
      }
     },
     "localname": "BusinessCombinationsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationsPolicy": {
     "auth_ref": [
      "r68",
      "r172"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for completed business combinations (purchase method, acquisition method or combination of entities under common control). This accounting policy may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction generally discloses the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy.",
        "label": "Business Combinations Policy [Policy Text Block]",
        "terseLabel": "Business Combinations"
       }
      }
     },
     "localname": "BusinessCombinationsPolicy",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CapitalExpendituresIncurredButNotYetPaid": {
     "auth_ref": [
      "r64",
      "r65",
      "r66"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Future cash outflow to pay for purchases of fixed assets that have occurred.",
        "label": "Capital Expenditures Incurred but Not yet Paid",
        "terseLabel": "Property and equipment included in unpaid liabilities"
       }
      }
     },
     "localname": "CapitalExpendituresIncurredButNotYetPaid",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r1",
      "r21",
      "r62"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 1.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      },
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
       "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, at Carrying Value",
        "terseLabel": "Cash and cash equivalents",
        "totalLabel": "Cash equivalents, Amortized Cost"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsFairValueDisclosure": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_CashAndCashEquivalentsAtCarryingValue",
       "weight": 1.0
      },
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_AssetsFairValueDisclosure",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion 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.",
        "label": "Cash and Cash Equivalents, Fair Value Disclosure",
        "terseLabel": "Total cash equivalents",
        "verboseLabel": "Cash equivalents, Estimated Fair Value"
       }
      }
     },
     "localname": "CashAndCashEquivalentsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsPolicyTextBlock": {
     "auth_ref": [
      "r7",
      "r63",
      "r68",
      "r97"
     ],
     "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]",
        "terseLabel": "Cash, Cash Equivalents and Restricted Cash"
       }
      }
     },
     "localname": "CashAndCashEquivalentsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r56",
      "r62",
      "r67"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents",
        "periodEndLabel": "Cash, cash equivalents, and restricted cash, end of period",
        "periodStartLabel": "Cash, cash equivalents, and restricted cash, beginning of period",
        "totalLabel": "Cash, cash equivalents and restricted cash as reported within the accompanying Condensed Consolidated Statements of Cash Flows"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": {
     "auth_ref": [
      "r56",
      "r212"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "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": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect",
        "totalLabel": "Net increase (decrease) in cash, cash equivalents, and restricted cash"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashEquivalentsMember": {
     "auth_ref": [
      "r7"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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": "Cash Equivalents [Member]",
        "verboseLabel": "Cash equivalents"
       }
      }
     },
     "localname": "CashEquivalentsMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ChangeInAccountingEstimateByTypeAxis": {
     "auth_ref": [
      "r71",
      "r72",
      "r77",
      "r78"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of change in accounting estimate.",
        "label": "Change in Accounting Estimate by Type [Axis]",
        "terseLabel": "Change in Accounting Estimate by Type [Axis]"
       }
      }
     },
     "localname": "ChangeInAccountingEstimateByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ChangeInAccountingEstimateTypeDomain": {
     "auth_ref": [
      "r71",
      "r72",
      "r77",
      "r79"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identification of the accounting estimate that was changed that had the effect of adjusting the carrying amount of an existing asset or liability, or that will alter the subsequent accounting for existing or future assets or liabilities.",
        "label": "Change in Accounting Estimate, Type [Domain]",
        "terseLabel": "Change in Accounting Estimate, Type [Domain]"
       }
      }
     },
     "localname": "ChangeInAccountingEstimateTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CollaborativeArrangementDisclosureTextBlock": {
     "auth_ref": [
      "r185"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for collaborative arrangements in which the entity is a participant, including a) information about the nature and purpose of such arrangements; b) its rights and obligations thereunder; c) the accounting policy for collaborative arrangements; and d) the income statement classification and amounts attributable to transactions arising from the collaborative arrangement between participants.",
        "label": "Collaborative Arrangement Disclosure [Text Block]",
        "terseLabel": "MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES"
       }
      }
     },
     "localname": "CollaborativeArrangementDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCES"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CollaborativeArrangementMember": {
     "auth_ref": [
      "r184"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contractual arrangement that involves two or more parties that both: (i) actively participate in a joint operating activity and (ii) are exposed to significant risks and rewards that depend on the commercial success of the joint operating activity.",
        "label": "Collaborative Arrangement [Member]",
        "terseLabel": "Collaboration Agreement"
       }
      }
     },
     "localname": "CollaborativeArrangementMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems": {
     "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": "Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]",
        "terseLabel": "Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]"
       }
      }
     },
     "localname": "CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommercialPaperMember": {
     "auth_ref": [
      "r134"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Unsecured promissory note (generally negotiable) that provides institutions with short-term funds.",
        "label": "Commercial Paper [Member]",
        "terseLabel": "Commercial paper securities",
        "verboseLabel": "Commercial paper securities"
       }
      }
     },
     "localname": "CommercialPaperMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingencies": {
     "auth_ref": [
      "r29",
      "r132",
      "r243",
      "r255"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.",
        "label": "Commitments and Contingencies",
        "terseLabel": "Commitments and contingencies"
       }
      }
     },
     "localname": "CommitmentsAndContingencies",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Commitments and Contingencies Disclosure [Abstract]",
        "terseLabel": "Commitments and Contingencies Disclosure [Abstract]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": {
     "auth_ref": [
      "r131",
      "r133"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for commitments and contingencies.",
        "label": "Commitments and Contingencies Disclosure [Text Block]",
        "terseLabel": "COMMITMENTS AND CONTINGENCIES"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIES"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]",
        "terseLabel": "Common Stock"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY",
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r12"
     ],
     "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",
        "periodEndLabel": "Ending Balances (in shares)",
        "periodStartLabel": "Beginning Balances (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r12"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 2.0,
       "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, Value, Issued",
        "terseLabel": "Common stock"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTax": {
     "auth_ref": [
      "r44",
      "r46",
      "r47"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS": {
       "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": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent",
        "totalLabel": "Comprehensive loss attributable to Sangamo Therapeutics, Inc."
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r44",
      "r46",
      "r189",
      "r190",
      "r197"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS": {
       "order": 2.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest",
        "terseLabel": "Comprehensive loss attributable to non-controlling interest"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r44",
      "r46",
      "r188",
      "r197"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      }
     },
     "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. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest",
        "totalLabel": "Comprehensive loss"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConcentrationRiskBenchmarkDomain": {
     "auth_ref": [
      "r86",
      "r87",
      "r209",
      "r210"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The denominator in a calculation of a disclosed concentration risk percentage.",
        "label": "Concentration Risk Benchmark [Domain]",
        "terseLabel": "Concentration Risk Benchmark"
       }
      }
     },
     "localname": "ConcentrationRiskBenchmarkDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConcentrationRiskByBenchmarkAxis": {
     "auth_ref": [
      "r86",
      "r87",
      "r209",
      "r210",
      "r258"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by benchmark of concentration risk.",
        "label": "Concentration Risk Benchmark [Axis]",
        "terseLabel": "Concentration Risk Benchmark"
       }
      }
     },
     "localname": "ConcentrationRiskByBenchmarkAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskByTypeAxis": {
     "auth_ref": [
      "r86",
      "r87",
      "r209",
      "r210",
      "r258"
     ],
     "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]",
        "terseLabel": "Concentration Risk Type"
       }
      }
     },
     "localname": "ConcentrationRiskByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskCreditRisk": {
     "auth_ref": [
      "r82",
      "r249"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for credit risk.",
        "label": "Concentration Risk, Credit Risk, Policy [Policy Text Block]",
        "terseLabel": "Concentrations of Risk"
       }
      }
     },
     "localname": "ConcentrationRiskCreditRisk",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ConcentrationRiskPercentage1": {
     "auth_ref": [
      "r86",
      "r87",
      "r209",
      "r210"
     ],
     "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": "Concentration Risk, Percentage",
        "terseLabel": "Percentage of revenues"
       }
      }
     },
     "localname": "ConcentrationRiskPercentage1",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ConcentrationRiskTypeDomain": {
     "auth_ref": [
      "r86",
      "r87",
      "r209",
      "r210"
     ],
     "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]",
        "terseLabel": "Concentration Risk Type"
       }
      }
     },
     "localname": "ConcentrationRiskTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ContractWithCustomerLiability": {
     "auth_ref": [
      "r139",
      "r140",
      "r145"
     ],
     "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.",
        "label": "Contract with Customer, Liability",
        "verboseLabel": "Deferred revenue"
       }
      }
     },
     "localname": "ContractWithCustomerLiability",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress": {
     "auth_ref": [
      "r142"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due.",
        "label": "Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress",
        "negatedTerseLabel": "Revenue reduction due to decrease in measure of proportional cumulative performance"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityCurrent": {
     "auth_ref": [
      "r139",
      "r140",
      "r145"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 3.0,
       "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": "Contract with Customer, Liability, Current",
        "terseLabel": "Deferred revenues"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityNoncurrent": {
     "auth_ref": [
      "r139",
      "r140",
      "r145"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 2.0,
       "parentTag": "us-gaap_Liabilities",
       "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 noncurrent.",
        "label": "Contract with Customer, Liability, Noncurrent",
        "terseLabel": "Deferred revenues, non-current"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CorporateDebtSecuritiesMember": {
     "auth_ref": [
      "r148",
      "r150"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt securities issued by domestic or foreign corporate business, banks and other entities with a promise of repayment.",
        "label": "Corporate Debt Securities [Member]",
        "terseLabel": "Corporate debt securities"
       }
      }
     },
     "localname": "CorporateDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.",
        "label": "Cumulative Effect of New Accounting Principle in Period of Adoption",
        "terseLabel": "Cumulative-effect adjustment of ASC"
       }
      }
     },
     "localname": "CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CustomerConcentrationRiskMember": {
     "auth_ref": [
      "r85"
     ],
     "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]",
        "terseLabel": "Customer Concentration Risk"
       }
      }
     },
     "localname": "CustomerConcentrationRiskMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss": {
     "auth_ref": [
      "r114"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Realized Loss",
        "terseLabel": "Realized losses of available-for-sale securities"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleRealizedLoss",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxLiabilitiesNet": {
     "auth_ref": [
      "r169",
      "r170"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 4.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.",
        "label": "Deferred Income Tax Liabilities, Net",
        "terseLabel": "Deferred income tax"
       }
      }
     },
     "localname": "DeferredIncomeTaxLiabilitiesNet",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepreciationDepletionAndAmortization": {
     "auth_ref": [
      "r60",
      "r92"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "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": "Depreciation, Depletion and Amortization",
        "terseLabel": "Depreciation and amortization"
       }
      }
     },
     "localname": "DepreciationDepletionAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeLiabilityMeasurementInput": {
     "auth_ref": [
      "r204"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of input used to measure derivative liability.",
        "label": "Derivative Liability, Measurement Input",
        "terseLabel": "Volatility Estimate"
       }
      }
     },
     "localname": "DerivativeLiabilityMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock": {
     "auth_ref": [
      "r137",
      "r163"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.",
        "label": "Disclosure of Compensation Related Costs, Share-based Payments [Text Block]",
        "terseLabel": "STOCK-BASED COMPENSATION"
       }
      }
     },
     "localname": "DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATION"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Disclosure of Compensation Related Costs, Share-based Payments [Abstract]",
        "terseLabel": "Disclosure of Compensation Related Costs, Share-based Payments [Abstract]"
       }
      }
     },
     "localname": "DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Earnings Per Share [Abstract]",
        "terseLabel": "Earnings Per Share [Abstract]"
       }
      }
     },
     "localname": "EarningsPerShareAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasicAndDiluted": {
     "auth_ref": [
      "r73"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements.  Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period.  Diluted earnings per share includes the amount of net income or 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": "Earnings Per Share, Basic and Diluted",
        "terseLabel": "Basic and diluted net loss per share attributable to Sangamo Therapeutics, Inc. stockholders (in dollars per share)"
       }
      }
     },
     "localname": "EarningsPerShareBasicAndDiluted",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareTextBlock": {
     "auth_ref": [
      "r76"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for earnings per share.",
        "label": "Earnings Per Share [Text Block]",
        "terseLabel": "BASIC AND DILUTED NET LOSS PER SHARE"
       }
      }
     },
     "localname": "EarningsPerShareTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/BASICANDDILUTEDNETLOSSPERSHARE"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r212"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 4.0,
       "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 on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents",
        "terseLabel": "Effects of changes in foreign exchange rates"
       }
      }
     },
     "localname": "EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems": {
     "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": "Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONStockBasedCompensationExpenseDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Equity [Abstract]",
        "terseLabel": "Equity [Abstract]"
       }
      }
     },
     "localname": "EquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r135"
     ],
     "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]",
        "terseLabel": "Equity Component"
       }
      }
     },
     "localname": "EquityComponentDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY",
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": {
     "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": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]",
        "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": {
     "auth_ref": [
      "r199",
      "r200",
      "r201",
      "r202",
      "r206",
      "r207"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.",
        "label": "Fair Value Measurements, Recurring and Nonrecurring [Table]",
        "terseLabel": "Fair Value Measurements, Recurring and Nonrecurring [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock": {
     "auth_ref": [
      "r199",
      "r200",
      "r201",
      "r202",
      "r206",
      "r207"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.",
        "label": "Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]",
        "terseLabel": "Summary of Fair Value Measurements of Cash Equivalents, Available-for-Sale Marketable Securities and Free Share Asset/Liability"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems": {
     "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": "Fair Value Measurement Inputs and Valuation Techniques [Line Items]",
        "terseLabel": "Fair Value Measurement Inputs and Valuation Techniques [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Table]",
        "terseLabel": "Fair Value Measurement Inputs and Valuation Techniques [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]",
        "terseLabel": "Summary of Estimated Fair Value of Free Shares Valuation Assumptions"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r148",
      "r149",
      "r150",
      "r201",
      "r233"
     ],
     "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]",
        "terseLabel": "Fair Value Hierarchy and NAV"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementFrequencyAxis": {
     "auth_ref": [
      "r199"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by measurement frequency.",
        "label": "Measurement Frequency [Axis]",
        "terseLabel": "Measurement Frequency"
       }
      }
     },
     "localname": "FairValueByMeasurementFrequencyAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Fair Value Disclosures [Abstract]",
        "terseLabel": "Fair Value Disclosures [Abstract]"
       }
      }
     },
     "localname": "FairValueDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresTextBlock": {
     "auth_ref": [
      "r208"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.",
        "label": "Fair Value Disclosures [Text Block]",
        "terseLabel": "FAIR VALUE MEASUREMENTS"
       }
      }
     },
     "localname": "FairValueDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTS"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r148",
      "r149",
      "r150",
      "r201",
      "r234"
     ],
     "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]",
        "terseLabel": "Level 1"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r148",
      "r149",
      "r150",
      "r201",
      "r235"
     ],
     "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]",
        "terseLabel": "Level 2"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r148",
      "r149",
      "r150",
      "r201",
      "r236"
     ],
     "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]",
        "terseLabel": "Level 3"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementFrequencyDomain": {
     "auth_ref": [
      "r199",
      "r205"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Provides the general categories used to describe the frequency with which financial assets and liabilities (as defined) are measured at fair value (on a recurring or nonrecurring basis).",
        "label": "Fair Value, Measurement Frequency [Domain]",
        "terseLabel": "Fair Value, Measurement Frequency"
       }
      }
     },
     "localname": "FairValueMeasurementFrequencyDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for fair value measurements of financial and non-financial assets, liabilities and instruments classified in shareholders' equity. Disclosures include, but are not limited to, how an entity that manages a group of financial assets and liabilities on the basis of its net exposure measures the fair value of those assets and liabilities.",
        "label": "Fair Value Measurement, Policy [Policy Text Block]",
        "terseLabel": "Fair Value Measurements"
       }
      }
     },
     "localname": "FairValueMeasurementPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [],
     "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]",
        "terseLabel": "Fair Value Hierarchy and NAV"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsRecurringMember": {
     "auth_ref": [
      "r199",
      "r205"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents a description of the frequency with which certain items are measured at fair value. Items measured at fair value on a recurring basis generally include those items for which measurement inputs are readily available and which are measured at fair value at successive reporting periods.",
        "label": "Fair Value, Measurements, Recurring [Member]",
        "terseLabel": "Fair value on recurring basis"
       }
      }
     },
     "localname": "FairValueMeasurementsRecurringMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancialInstrumentAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of financial instrument.",
        "label": "Financial Instrument [Axis]",
        "terseLabel": "Financial Instrument"
       }
      }
     },
     "localname": "FinancialInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ForeignCurrencyExchangeRateTranslation1": {
     "auth_ref": [
      "r215"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.",
        "label": "Foreign Currency Exchange Rate, Translation",
        "terseLabel": "EUR / USD Exchange Rate"
       }
      }
     },
     "localname": "ForeignCurrencyExchangeRateTranslation1",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "pureItemType"
    },
    "us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock": {
     "auth_ref": [
      "r68",
      "r211",
      "r214"
     ],
     "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]",
        "terseLabel": "Foreign Currency Translation"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_GainLossOnTerminationOfLease": {
     "auth_ref": [
      "r217"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) on termination of lease before expiration of lease term.",
        "label": "Gain (Loss) on Termination of Lease",
        "negatedLabel": "Net loss on lease termination"
       }
      }
     },
     "localname": "GainLossOnTerminationOfLease",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GeneralAndAdministrativeExpense": {
     "auth_ref": [
      "r50"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.",
        "label": "General and Administrative Expense",
        "terseLabel": "General and administrative"
       }
      }
     },
     "localname": "GeneralAndAdministrativeExpense",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GeneralAndAdministrativeExpenseMember": {
     "auth_ref": [
      "r49"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption encompassing general and administrative expense.",
        "label": "General and Administrative Expense [Member]",
        "terseLabel": "General and administrative"
       }
      }
     },
     "localname": "GeneralAndAdministrativeExpenseMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONStockBasedCompensationExpenseDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Goodwill": {
     "auth_ref": [
      "r117",
      "r119"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
       "weight": 1.0
      },
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 5.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "label": "Goodwill",
        "terseLabel": "Goodwill"
       }
      }
     },
     "localname": "Goodwill",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock": {
     "auth_ref": [
      "r68",
      "r121",
      "r124"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for goodwill and intangible assets. This accounting policy also may address how an entity assesses and measures impairment of goodwill and intangible assets.",
        "label": "Goodwill and Intangible Assets, Policy [Policy Text Block]",
        "terseLabel": "Goodwill and Intangible Assets"
       }
      }
     },
     "localname": "GoodwillAndIntangibleAssetsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_GoodwillImpairmentLoss": {
     "auth_ref": [
      "r60",
      "r118",
      "r120",
      "r122"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "label": "Goodwill, Impairment Loss",
        "terseLabel": "Goodwill impairments"
       }
      }
     },
     "localname": "GoodwillImpairmentLoss",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GrantMember": {
     "auth_ref": [
      "r146"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Award of money not required to be repaid.",
        "label": "Grant [Member]",
        "terseLabel": "Research Grants"
       }
      }
     },
     "localname": "GrantMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock": {
     "auth_ref": [
      "r68",
      "r126",
      "r130"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for recognizing and measuring the impairment of long-lived assets. An entity also may disclose its accounting policy for long-lived assets to be sold. This policy excludes goodwill and intangible assets.",
        "label": "Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]",
        "terseLabel": "Valuation of Long-Lived Assets"
       }
      }
     },
     "localname": "ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Income Statement [Abstract]",
        "terseLabel": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationAxis": {
     "auth_ref": [
      "r129"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by location in the income statement.",
        "label": "Income Statement Location [Axis]",
        "terseLabel": "Income Statement Location"
       }
      }
     },
     "localname": "IncomeStatementLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONStockBasedCompensationExpenseDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Location in the income statement.",
        "label": "Income Statement Location [Domain]",
        "terseLabel": "Income Statement Location"
       }
      }
     },
     "localname": "IncomeStatementLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONStockBasedCompensationExpenseDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Income Tax Disclosure [Abstract]",
        "terseLabel": "Income Tax Disclosure [Abstract]"
       }
      }
     },
     "localname": "IncomeTaxDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxDisclosureTextBlock": {
     "auth_ref": [
      "r171"
     ],
     "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]",
        "terseLabel": "INCOME TAXES"
       }
      }
     },
     "localname": "IncomeTaxDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/INCOMETAXES"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 13.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.",
        "label": "Increase (Decrease) in Accounts Payable and Accrued Liabilities",
        "terseLabel": "Accounts payable and accrued liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsPayableAndAccruedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsReceivable": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 10.0,
       "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": "Increase (Decrease) in Accounts Receivable",
        "negatedLabel": "Accounts receivable"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the amount due from borrowers for interest payments.",
        "label": "Increase (Decrease) in Accrued Interest Receivable, Net",
        "negatedLabel": "Interest receivable"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccruedInterestReceivableNet",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInContractWithCustomerLiability": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 15.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.",
        "label": "Increase (Decrease) in Contract with Customer, Liability",
        "terseLabel": "Deferred revenues"
       }
      }
     },
     "localname": "IncreaseDecreaseInContractWithCustomerLiability",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 14.0,
       "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 obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.",
        "label": "Increase (Decrease) in Employee Related Liabilities",
        "terseLabel": "Accrued compensation and employee benefits"
       }
      }
     },
     "localname": "IncreaseDecreaseInEmployeeRelatedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Increase (Decrease) in Operating Capital [Abstract]",
        "terseLabel": "Net changes in operating assets and liabilities:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingCapitalAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 17.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in noncurrent operating liabilities classified as other.",
        "label": "Increase (Decrease) in Other Noncurrent Liabilities",
        "terseLabel": "Other non-current liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherNoncurrentLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 11.0,
       "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": "Increase (Decrease) in Prepaid Expense and Other Assets",
        "negatedLabel": "Prepaid expenses and other assets"
       }
      }
     },
     "localname": "IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInPrepaidRent": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) of consideration paid in advance for rent that provides economic benefits in future periods.",
        "label": "Increase (Decrease) in Prepaid Rent",
        "negatedLabel": "Prepaid rent"
       }
      }
     },
     "localname": "IncreaseDecreaseInPrepaidRent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInStockholdersEquityRollForward": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Increase (Decrease) in Stockholders' Equity [Roll Forward]",
        "terseLabel": "Increase (Decrease) in Stockholders' Equity [Roll Forward]"
       }
      }
     },
     "localname": "IncreaseDecreaseInStockholdersEquityRollForward",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IntangibleAssetsNetExcludingGoodwill": {
     "auth_ref": [
      "r123",
      "r125"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 4.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.",
        "label": "Intangible Assets, Net (Excluding Goodwill)",
        "terseLabel": "Intangible assets"
       }
      }
     },
     "localname": "IntangibleAssetsNetExcludingGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestAndOtherIncome": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business).",
        "label": "Interest and Other Income",
        "terseLabel": "Interest and other income, net"
       }
      }
     },
     "localname": "InterestAndOtherIncome",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestReceivableCurrent": {
     "auth_ref": [
      "r32"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 3.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of current interest earned but not received. Also called accrued interest or accrued interest receivable. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.",
        "label": "Interest Receivable, Current",
        "terseLabel": "Interest receivable"
       }
      }
     },
     "localname": "InterestReceivableCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.",
        "label": "Investments Classified by Contractual Maturity Date [Table Text Block]",
        "terseLabel": "Fair value of investments available-for-sale"
       }
      }
     },
     "localname": "InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Investments, Debt and Equity Securities [Abstract]",
        "terseLabel": "Investments, Debt and Equity Securities [Abstract]"
       }
      }
     },
     "localname": "InvestmentsDebtAndEquitySecuritiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": {
     "auth_ref": [
      "r116",
      "r238",
      "r248",
      "r259"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for  investments in certain debt and equity securities.",
        "label": "Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]",
        "terseLabel": "CASH EQUIVALENTS AND MARKETABLE SECURITIES"
       }
      }
     },
     "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIES"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LandSubjectToGroundLeases": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Area of land subject to a ground lease.",
        "label": "Land Subject to Ground Leases",
        "terseLabel": "Area of space leased (in sqft)"
       }
      }
     },
     "localname": "LandSubjectToGroundLeases",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "areaItemType"
    },
    "us-gaap_LesseeLeasesPolicyTextBlock": {
     "auth_ref": [
      "r221"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for leasing arrangement entered into by lessee.",
        "label": "Lessee, Leases [Policy Text Block]",
        "terseLabel": "Leases"
       }
      }
     },
     "localname": "LesseeLeasesPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": {
     "auth_ref": [
      "r229"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.",
        "label": "Lessee, Operating Lease, Liability, Maturity [Table Text Block]",
        "terseLabel": "Summary of Maturities of Operating Lease Liabilities"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": {
     "auth_ref": [
      "r229"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail_1": {
       "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 operating lease.",
        "label": "Lessee, Operating Lease, Liability, Payments, Due",
        "totalLabel": "Total lease payments"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDue",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": {
     "auth_ref": [
      "r229"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "order": 6.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.",
        "label": "Lessee, Operating Lease, Liability, Payments, Due after Year Five",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": {
     "auth_ref": [
      "r229"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "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 payments for operating lease, due in fifth fiscal year following latest fiscal year.",
        "label": "Lessee, Operating Lease, Liability, Payments, Due Year Five",
        "terseLabel": "2024"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": {
     "auth_ref": [
      "r229"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "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 payments for operating lease, due in fourth fiscal year following latest fiscal year.",
        "label": "Lessee, Operating Lease, Liability, Payments, Due Year Four",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": {
     "auth_ref": [
      "r229"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "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 payments for operating lease, due in third fiscal year following latest fiscal year.",
        "label": "Lessee, Operating Lease, Liability, Payments, Due Year Three",
        "terseLabel": "2022"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": {
     "auth_ref": [
      "r229"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "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 payments for operating lease, due in second fiscal year following latest fiscal year.",
        "label": "Lessee, Operating Lease, Liability, Payments, Due Year Two",
        "terseLabel": "2021"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear": {
     "auth_ref": [
      "r229"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "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 payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.",
        "label": "Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year",
        "terseLabel": "Nine months ending December 31, 2020"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": {
     "auth_ref": [
      "r229"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail_1": {
       "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 payments in excess of discounted obligation for lease payments for operating lease.",
        "label": "Lessee, Operating Lease, Liability, Undiscounted Excess Amount",
        "negatedLabel": "Imputed interest"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseRenewalTerm": {
     "auth_ref": [
      "r222"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Lessee, Operating Lease, Renewal Term",
        "terseLabel": "Lease agreement, extendable lease term"
       }
      }
     },
     "localname": "LesseeOperatingLeaseRenewalTerm",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "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": "Letters of Credit Outstanding, Amount",
        "terseLabel": "Letter of credit established as a deposit"
       }
      }
     },
     "localname": "LettersOfCreditOutstandingAmount",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r25"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 1.0,
       "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": "Liabilities",
        "totalLabel": "Total liabilities"
       }
      }
     },
     "localname": "Liabilities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r18",
      "r241",
      "r253"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "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": "Liabilities and Equity",
        "totalLabel": "Total liabilities and stockholders' equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities and Equity [Abstract]",
        "terseLabel": "LIABILITIES AND STOCKHOLDERS' EQUITY"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesCurrent": {
     "auth_ref": [
      "r27"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 1.0,
       "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": "Liabilities, Current",
        "totalLabel": "Total current liabilities"
       }
      }
     },
     "localname": "LiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesCurrentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities, Current [Abstract]",
        "terseLabel": "Current liabilities:"
       }
      }
     },
     "localname": "LiabilitiesCurrentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesFairValueDisclosure": {
     "auth_ref": [
      "r200"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of financial and nonfinancial obligations.",
        "label": "Financial and Nonfinancial Liabilities, Fair Value Disclosure",
        "terseLabel": "Free shares asset"
       }
      }
     },
     "localname": "LiabilitiesFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LicenseAndServiceMember": {
     "auth_ref": [
      "r146"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Right to use intangible asset and performance of related service. Intangible asset includes, but is not limited to, patent, copyright, technology, manufacturing process, software or trademark.",
        "label": "License and Service [Member]",
        "terseLabel": "Collaboration Agreements",
        "verboseLabel": "Collaboration Agreements"
       }
      }
     },
     "localname": "LicenseAndServiceMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MarketableSecuritiesPolicy": {
     "auth_ref": [
      "r247"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for investment classified as marketable security.",
        "label": "Marketable Securities, Policy [Policy Text Block]",
        "terseLabel": "Marketable Securities"
       }
      }
     },
     "localname": "MarketableSecuritiesPolicy",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_MarketableSecuritiesTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.",
        "label": "Marketable Securities [Table Text Block]",
        "terseLabel": "Marketable Securities"
       }
      }
     },
     "localname": "MarketableSecuritiesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_MeasurementInputOptionVolatilityMember": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using rate at which price of option increases (decreases) for given set of returns.",
        "label": "Measurement Input, Option Volatility [Member]",
        "terseLabel": "Stock Price Volatility Estimate"
       }
      }
     },
     "localname": "MeasurementInputOptionVolatilityMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputPriceVolatilityMember": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using rate at which price of security will increase (decrease) for given set of returns.",
        "label": "Measurement Input, Price Volatility [Member]",
        "terseLabel": "Price Volatility"
       }
      }
     },
     "localname": "MeasurementInputPriceVolatilityMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputSharePriceMember": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using share price of saleable stock.",
        "label": "Measurement Input, Share Price [Member]",
        "terseLabel": "Stock Price"
       }
      }
     },
     "localname": "MeasurementInputSharePriceMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputTypeAxis": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Axis]",
        "terseLabel": "Measurement Input Type"
       }
      }
     },
     "localname": "MeasurementInputTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_MeasurementInputTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Domain]",
        "terseLabel": "Measurement Input Type"
       }
      }
     },
     "localname": "MeasurementInputTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MinorityInterest": {
     "auth_ref": [
      "r31",
      "r240",
      "r252"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "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 is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).",
        "label": "Stockholders' Equity Attributable to Noncontrolling Interest",
        "periodEndLabel": "Balance at March 31, 2020",
        "periodStartLabel": "Balance at December 31, 2019",
        "terseLabel": "Non-controlling interest"
       }
      }
     },
     "localname": "MinorityInterest",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofNoncontrollingInterestDetail",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MinorityInterestOwnershipPercentageByParent": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The parent entity's interest in net assets of the subsidiary, expressed as a percentage.",
        "label": "Noncontrolling Interest, Ownership Percentage by Parent",
        "terseLabel": "Noncontrolling interest ownership percentage"
       }
      }
     },
     "localname": "MinorityInterestOwnershipPercentageByParent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_MoneyMarketFundsMember": {
     "auth_ref": [
      "r148"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fund that invests in short-term money-market instruments, for example, but not limited to, commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and other highly liquid securities.",
        "label": "Money Market Funds [Member]",
        "terseLabel": "Money market funds"
       }
      }
     },
     "localname": "MoneyMarketFundsMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MovementInMinorityInterestRollForward": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]",
        "terseLabel": "Noncontrolling Interest [Roll Forward]"
       }
      }
     },
     "localname": "MovementInMinorityInterestRollForward",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofNoncontrollingInterestDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r56"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "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": "Net Cash Provided by (Used in) Financing Activities",
        "totalLabel": "Net cash provided by financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]",
        "terseLabel": "Financing Activities:"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r56"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "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": "Net Cash Provided by (Used in) Investing Activities",
        "totalLabel": "Net cash provided by (used in) investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided by (Used in) Investing Activities [Abstract]",
        "terseLabel": "Investing Activities:"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r56",
      "r58",
      "r61"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "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": "Net Cash Provided by (Used in) Operating Activities",
        "totalLabel": "Net cash used in operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided by (Used in) Operating Activities [Abstract]",
        "terseLabel": "Operating Activities:"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r43",
      "r45",
      "r48",
      "r61",
      "r75",
      "r244",
      "r256"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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) Attributable to Parent",
        "totalLabel": "Net loss to Sangamo Therapeutics, Inc. stockholders"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r43",
      "r45",
      "r192",
      "r196"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of Net Income (Loss) attributable to noncontrolling interest.",
        "label": "Net Income (Loss) Attributable to Noncontrolling Interest",
        "terseLabel": "Loss attributable to non-controlling interest",
        "verboseLabel": "Net loss attributable to non-controlling interest"
       }
      }
     },
     "localname": "NetIncomeLossAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofNoncontrollingInterestDetail",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.",
        "label": "New Accounting Pronouncements, Policy [Policy Text Block]",
        "terseLabel": "Recent Accounting Pronouncements"
       }
      }
     },
     "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NoncashInvestingAndFinancingItemsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Noncash Investing and Financing Items [Abstract]",
        "terseLabel": "Supplemental disclosure of non-cash activities:"
       }
      }
     },
     "localname": "NoncashInvestingAndFinancingItemsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NoncontrollingInterestMember": {
     "auth_ref": [
      "r186"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents that portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent. A noncontrolling interest is sometimes called a minority interest.",
        "label": "Noncontrolling Interest [Member]",
        "terseLabel": "Non- Controlling Interest"
       }
      }
     },
     "localname": "NoncontrollingInterestMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OperatingExpenses": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "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": "Operating Expenses",
        "totalLabel": "Total operating expenses"
       }
      }
     },
     "localname": "OperatingExpenses",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Operating Expenses [Abstract]",
        "terseLabel": "Operating expenses:"
       }
      }
     },
     "localname": "OperatingExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OperatingIncomeLoss": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net result for the period of deducting operating expenses from operating revenues.",
        "label": "Operating Income (Loss)",
        "totalLabel": "Loss from operations"
       }
      }
     },
     "localname": "OperatingIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseCost": {
     "auth_ref": [
      "r223",
      "r230"
     ],
     "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",
        "terseLabel": "Operating lease costs"
       }
      }
     },
     "localname": "OperatingLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiability": {
     "auth_ref": [
      "r219"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail_1": {
       "order": 2.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.",
        "label": "Operating Lease, Liability",
        "terseLabel": "Total",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "OperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilityCurrent": {
     "auth_ref": [
      "r219"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "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": "Operating Lease, Liability, Current",
        "terseLabel": "Operating lease liabilities - current (included in Accounts payable and accrued liabilities on the Condensed Consolidated Balance Sheet)"
       }
      }
     },
     "localname": "OperatingLeaseLiabilityCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilityNoncurrent": {
     "auth_ref": [
      "r219"
     ],
     "calculation": {
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_OperatingLeaseLiability",
       "weight": 1.0
      },
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 3.0,
       "parentTag": "us-gaap_Liabilities",
       "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": "Operating Lease, Liability, Noncurrent",
        "terseLabel": "Operating lease liabilities - long-term",
        "verboseLabel": "Long-term portion of lease liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiabilityNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESSummaryofMaturitiesofOperatingLeaseLiabilitiesDetail",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeasePayments": {
     "auth_ref": [
      "r220",
      "r225"
     ],
     "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 Lease, Payments",
        "terseLabel": "Cash paid for operating lease liabilities included net cash used in operating activities"
       }
      }
     },
     "localname": "OperatingLeasePayments",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseRightOfUseAsset": {
     "auth_ref": [
      "r218"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 6.0,
       "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 lease.",
        "label": "Operating Lease, Right-of-Use Asset",
        "terseLabel": "Operating lease right-of-use assets"
       }
      }
     },
     "localname": "OperatingLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": {
     "auth_ref": [
      "r228",
      "r230"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average discount rate for operating lease calculated at point in time.",
        "label": "Operating Lease, Weighted Average Discount Rate, Percent",
        "terseLabel": "Operating lease, weighted-average discount rate"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageDiscountRatePercent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": {
     "auth_ref": [
      "r227",
      "r230"
     ],
     "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": "Operating Lease, Weighted Average Remaining Lease Term",
        "terseLabel": "Operating lease, weighted-average remaining lease term"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Organization, Consolidation and Presentation of Financial Statements [Abstract]",
        "terseLabel": "Organization, Consolidation and Presentation of Financial Statements [Abstract]"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r0",
      "r70",
      "r91",
      "r198"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for the organization, consolidation and basis of presentation of financial statements disclosure, and significant accounting policies of the reporting entity. May be provided in more than one note to the financial statements, as long as users are provided with an understanding of (1) the significant judgments and assumptions made by an enterprise in determining whether it must consolidate a VIE and/or disclose information about its involvement with a VIE, (2) the nature of restrictions on a consolidated VIE's assets reported by an enterprise in its statement of financial position, including the carrying amounts of such assets, (3) the nature of, and changes in, the risks associated with an enterprise's involvement with the VIE, and (4) how an enterprise's involvement with the VIE affects the enterprise's financial position, financial performance, and cash flows.  Describes procedure if disclosures are provided in more than one note to the financial statements.",
        "label": "Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]",
        "terseLabel": "ORGANIZATION, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherAssetsNoncurrent": {
     "auth_ref": [
      "r23"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 7.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of noncurrent assets classified as other.",
        "label": "Other Assets, Noncurrent",
        "terseLabel": "Other non-current assets"
       }
      }
     },
     "localname": "OtherAssetsNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax": {
     "auth_ref": [
      "r35",
      "r213"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS": {
       "order": 2.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
       "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.",
        "label": "Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax",
        "terseLabel": "Foreign currency translation adjustment"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax": {
     "auth_ref": [
      "r35",
      "r39"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of tax expense (benefit), after 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.",
        "label": "Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax",
        "negatedLabel": "Foreign currency translation adjustment"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax": {
     "auth_ref": [
      "r36",
      "r38"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS": {
       "order": 3.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.",
        "label": "Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax",
        "terseLabel": "Change in unrealized gain on available-for-sale securities",
        "verboseLabel": "Net unrealized gain (loss) on marketable securities"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilitiesNoncurrent": {
     "auth_ref": [
      "r28"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 5.0,
       "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 Liabilities, Noncurrent",
        "terseLabel": "Other non-current liabilities",
        "verboseLabel": "Other long-term liabilities"
       }
      }
     },
     "localname": "OtherLiabilitiesNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherNoncashIncomeExpense": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other.",
        "label": "Other Noncash Income (Expense)",
        "negatedLabel": "Other"
       }
      }
     },
     "localname": "OtherNoncashIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale": {
     "auth_ref": [
      "r102"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI).",
        "label": "Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale",
        "terseLabel": "Other-than-temporarily impaired investments"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation": {
     "auth_ref": [
      "r54",
      "r151"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.",
        "label": "Payments Related to Tax Withholding for Share-based Compensation",
        "negatedLabel": "Taxes paid related to net share settlement of equity awards"
       }
      }
     },
     "localname": "PaymentsRelatedToTaxWithholdingForShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries": {
     "auth_ref": [
      "r51"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the purchase of noncontrolling interest during the period.",
        "label": "Payments to Acquire Additional Interest in Subsidiaries",
        "terseLabel": "Purchase of additional Sangamo France shares"
       }
      }
     },
     "localname": "PaymentsToAcquireAdditionalInterestInSubsidiaries",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireMarketableSecurities": {
     "auth_ref": [
      "r100"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow for purchase of marketable security.",
        "label": "Payments to Acquire Marketable Securities",
        "negatedLabel": "Purchases of marketable securities"
       }
      }
     },
     "localname": "PaymentsToAcquireMarketableSecurities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": {
     "auth_ref": [
      "r52"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "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": "Payments to Acquire Property, Plant, and Equipment",
        "negatedLabel": "Purchases of property and equipment"
       }
      }
     },
     "localname": "PaymentsToAcquirePropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PreferredStockValue": {
     "auth_ref": [
      "r11"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Preferred Stock, Value, Issued",
        "terseLabel": "Preferred stock"
       }
      }
     },
     "localname": "PreferredStockValue",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PrepaidExpenseAndOtherAssetsCurrent": {
     "auth_ref": [
      "r2",
      "r19",
      "r20"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 5.0,
       "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 in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.",
        "label": "Prepaid Expense and Other Assets, Current",
        "terseLabel": "Prepaid expenses and other current assets"
       }
      }
     },
     "localname": "PrepaidExpenseAndOtherAssetsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromCollaborators": {
     "auth_ref": [
      "r57"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash received from collaborators during the current period.",
        "label": "Proceeds from Collaborators",
        "terseLabel": "Proceeds from collaborators"
       }
      }
     },
     "localname": "ProceedsFromCollaborators",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfCommonStock": {
     "auth_ref": [
      "r53"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow from the additional capital contribution to the entity.",
        "label": "Proceeds from Issuance of Common Stock",
        "terseLabel": "Proceeds from exercise of stock options and restricted stock units"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities": {
     "auth_ref": [],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities  (held-to-maturity or available-for-sale) during the period.",
        "label": "Proceeds from Sale and Maturity of Marketable Securities",
        "terseLabel": "Maturities of marketable securities"
       }
      }
     },
     "localname": "ProceedsFromSaleAndMaturityOfMarketableSecurities",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProfitLoss": {
     "auth_ref": [
      "r43",
      "r45",
      "r55",
      "r93",
      "r94",
      "r188",
      "r191",
      "r193",
      "r196",
      "r197"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      },
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.",
        "label": "Net Income (Loss), Including Portion Attributable to Noncontrolling Interest",
        "negatedLabel": "Decrease in net loss",
        "terseLabel": "Net loss",
        "totalLabel": "Net loss"
       }
      }
     },
     "localname": "ProfitLoss",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentByTypeAxis": {
     "auth_ref": [
      "r22",
      "r128"
     ],
     "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": "Property, Plant and Equipment, Type [Axis]",
        "terseLabel": "Property, Plant and Equipment, Type"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentNet": {
     "auth_ref": [
      "r8",
      "r9",
      "r128",
      "r254"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 3.0,
       "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": "Property, Plant and Equipment, Net",
        "terseLabel": "Property and equipment, net"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentNet",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTypeDomain": {
     "auth_ref": [
      "r8",
      "r127"
     ],
     "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": "Property, Plant and Equipment, Type [Domain]",
        "terseLabel": "Property, Plant and Equipment, Type"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis": {
     "auth_ref": [
      "r216"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by property that could be leased or is available for lease.",
        "label": "Property Subject to or Available for Operating Lease [Axis]",
        "terseLabel": "Property Subject to or Available for Operating Lease"
       }
      }
     },
     "localname": "PropertySubjectToOrAvailableForOperatingLeaseAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain": {
     "auth_ref": [
      "r216"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A descriptive title of whether the property is subject to or available for operating lease.",
        "label": "Property Subject to or Available for Operating Lease [Domain]",
        "terseLabel": "Property Subject to or Available for Operating Lease"
       }
      }
     },
     "localname": "PropertySubjectToOrAvailableForOperatingLeaseDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis": {
     "auth_ref": [
      "r166",
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by form of arrangement related to research and development.",
        "label": "Research and Development Arrangement, Contract to Perform for Others, Type [Axis]",
        "verboseLabel": "Research and Development Arrangement, Contract to Perform for Others, Type"
       }
      }
     },
     "localname": "ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned": {
     "auth_ref": [
      "r165",
      "r167"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of compensation earned (contract income) under a research and development arrangement accounted for as a contract to perform research and development for others.",
        "label": "Research and Development Arrangement, Contract to Perform for Others, Compensation Earned",
        "terseLabel": "Revenues under agreement"
       }
      }
     },
     "localname": "ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems": {
     "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": "Research and Development Arrangement, Contract to Perform for Others [Line Items]",
        "terseLabel": "Research and Development Arrangement, Contract to Perform for Others [Line Items]"
       }
      }
     },
     "localname": "ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain": {
     "auth_ref": [
      "r166",
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Listing of significant agreements under research and development arrangements accounted for as a contract to perform research and development for others.",
        "label": "Research and Development Arrangement, Contract to Perform for Others, Type [Domain]",
        "verboseLabel": "Research and Development Arrangement, Contract to Perform for Others, Type"
       }
      }
     },
     "localname": "ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ResearchAndDevelopmentExpense": {
     "auth_ref": [
      "r164",
      "r263"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.",
        "label": "Research and Development Expense",
        "terseLabel": "Research and development"
       }
      }
     },
     "localname": "ResearchAndDevelopmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ResearchAndDevelopmentExpenseMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption in which the reported facts about research and development expense have been included.",
        "label": "Research and Development Expense [Member]",
        "terseLabel": "Research and development"
       }
      }
     },
     "localname": "ResearchAndDevelopmentExpenseMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONStockBasedCompensationExpenseDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RestrictedCashAndCashEquivalentsNoncurrent": {
     "auth_ref": [
      "r4",
      "r10",
      "r62",
      "r67",
      "r261"
     ],
     "calculation": {
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. 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": "Restricted Cash and Cash Equivalents, Noncurrent",
        "terseLabel": "Non-current restricted cash"
       }
      }
     },
     "localname": "RestrictedCashAndCashEquivalentsNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestrictedCashNoncurrent": {
     "auth_ref": [
      "r4",
      "r10",
      "r67",
      "r261"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 8.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash restricted as to withdrawal or usage, classified as noncurrent. 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, Noncurrent",
        "terseLabel": "Non-current restricted cash"
       }
      }
     },
     "localname": "RestrictedCashNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r15",
      "r136",
      "r251"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 4.0,
       "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 (Accumulated Deficit)",
        "terseLabel": "Accumulated deficit"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]",
        "terseLabel": "Accumulated Deficit"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": {
     "auth_ref": [
      "r141",
      "r143",
      "r144"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "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": "Revenue from Contract with Customer, Excluding Assessed Tax",
        "terseLabel": "Revenues",
        "verboseLabel": "Increase in revenues"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerExcludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Revenue from satisfaction of performance obligation by transferring promised good or service to customer, when it serves as benchmark in concentration of risk calculation.",
        "label": "Revenue from Contract with Customer [Member]",
        "terseLabel": "Revenue from Contract with Customer"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": {
     "auth_ref": [
      "r226",
      "r230"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase in right-of-use asset obtained in exchange for operating lease liability.",
        "label": "Right-of-Use Asset Obtained in Exchange for Operating Lease Liability",
        "terseLabel": "Right-of-use assets obtained in exchange for lease obligations"
       }
      }
     },
     "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SaleOfStockConsiderationReceivedOnTransaction": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash received on stock transaction after deduction of issuance costs.",
        "label": "Sale of Stock, Consideration Received on Transaction",
        "terseLabel": "Consideration received on transaction"
       }
      }
     },
     "localname": "SaleOfStockConsiderationReceivedOnTransaction",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.",
        "label": "Sale of Stock, Number of Shares Issued in Transaction",
        "terseLabel": "Number of shares issued in transaction (in shares)"
       }
      }
     },
     "localname": "SaleOfStockNumberOfSharesIssuedInTransaction",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SaleOfStockPricePerShare": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.",
        "label": "Sale of Stock, Price Per Share",
        "terseLabel": "Sale of stock, price per share (in dollars per share)"
       }
      }
     },
     "localname": "SaleOfStockPricePerShare",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems": {
     "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": "Debt Securities, Available-for-sale [Line Items]",
        "terseLabel": "Debt Securities, Available-for-sale [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfAvailableForSaleSecuritiesTable": {
     "auth_ref": [
      "r107",
      "r110",
      "r111",
      "r112",
      "r113",
      "r115",
      "r245",
      "r246"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.",
        "label": "Schedule of Available-for-sale Securities [Table]",
        "terseLabel": "Schedule of Available-for-sale Securities [Table]"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable": {
     "auth_ref": [
      "r174",
      "r175"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule reflecting each material business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities.",
        "label": "Schedule of Business Acquisitions, by Acquisition [Table]",
        "terseLabel": "Schedule of Business Acquisitions, by Acquisition [Table]"
       }
      }
     },
     "localname": "ScheduleOfBusinessAcquisitionsByAcquisitionTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASSummaryofEstimatedFairValueofNetAssetsAcquiredDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the components of cash and cash equivalents.",
        "label": "Schedule of Cash and Cash Equivalents [Table Text Block]",
        "terseLabel": "Schedule of Cash and Cash Equivalents"
       }
      }
     },
     "localname": "ScheduleOfCashAndCashEquivalentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable": {
     "auth_ref": [
      "r184"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of contractual arrangements that involve two or more parties that both: (i) actively participate in a joint operating activity and (ii) are exposed to significant risks and rewards that depend on the commercial success of the joint operating activity. Additionally, the element may include all other transactions of the entity categorized collectively, if such comparison of collaborative arrangements as a component of all transactions of the entity is desired.",
        "label": "Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table]",
        "terseLabel": "Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table]"
       }
      }
     },
     "localname": "ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTableTextBlock": {
     "auth_ref": [
      "r184"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of contractual arrangements that involve two or more parties that both: (i) actively participate in a joint operating activity and (ii) are exposed to significant risks and rewards that depend on the commercial success of the joint operating activity. Additionally, the element may include all other transactions of the entity categorized collectively, if such comparison of collaborative arrangements as a component of all transactions of the entity is desired.",
        "label": "Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table Text Block]",
        "terseLabel": "Revenues Recognized under Agreement"
       }
      }
     },
     "localname": "ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable": {
     "auth_ref": [
      "r153",
      "r157",
      "r160"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule that sets forth the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.",
        "label": "Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table]",
        "terseLabel": "Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table]"
       }
      }
     },
     "localname": "ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONStockBasedCompensationExpenseDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock": {
     "auth_ref": [
      "r153",
      "r157",
      "r160"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.",
        "label": "Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]",
        "terseLabel": "Stock-Based Compensation Expense"
       }
      }
     },
     "localname": "ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKBASEDCOMPENSATIONTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock": {
     "auth_ref": [
      "r179"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree.",
        "label": "Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]",
        "terseLabel": "Summary of Estimated Fair Value of Net Assets Acquired"
       }
      }
     },
     "localname": "ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable": {
     "auth_ref": [
      "r166",
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A schedule reflecting the terms of significant agreements under research and development arrangements accounted for as a contract to perform research and development for others (including royalty arrangements, purchase provisions, license agreements, and commitments to provide additional funding), aggregated by similar arrangements or individually if necessary to understand the effects on the financial statements.",
        "label": "Schedule of Research and Development Arrangement, Contract to Perform for Others [Table]",
        "terseLabel": "Schedule of Research and Development Arrangement, Contract to Perform for Others [Table]"
       }
      }
     },
     "localname": "ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESRevenuesRecognizedunderAgreementDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": {
     "auth_ref": [
      "r155",
      "r159"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Components of an equity-based arrangement under which compensation is awarded to employees, typically comprised of compensation expense; changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan; and cash flow effects resulting from the equity-based payment arrangement. Component disclosures are by type of award and plan name.",
        "label": "Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]",
        "terseLabel": "Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensation": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.",
        "label": "Share-based Compensation",
        "terseLabel": "Stock-based compensation"
       }
      }
     },
     "localname": "ShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems": {
     "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": "Share-based Compensation Arrangement by Share-based Payment Award [Line Items]",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award [Line Items]"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SharePrice": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Price of a single share of a number of saleable stocks of a company.",
        "label": "Share Price",
        "terseLabel": "Sangamo Stock Price (USD) (in dollars per share)"
       }
      }
     },
     "localname": "SharePrice",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharesIssuedPricePerShare": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Per share or per unit amount of equity securities issued.",
        "label": "Shares Issued, Price Per Share",
        "terseLabel": "Public offering price of common stock issued (in USD per share)"
       }
      }
     },
     "localname": "SharesIssuedPricePerShare",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r30",
      "r135"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Equity Components [Axis]",
        "terseLabel": "Equity Components"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY",
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail"
     ],
     "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]",
        "terseLabel": "Statement [Line Items]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Cash Flows [Abstract]",
        "terseLabel": "Statement of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Financial Position [Abstract]",
        "terseLabel": "Statement of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Comprehensive Income [Abstract]",
        "terseLabel": "Statement of Comprehensive Income [Abstract]"
       }
      }
     },
     "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Stockholders' Equity [Abstract]",
        "terseLabel": "Statement of Stockholders' Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [],
     "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]",
        "terseLabel": "Statement [Table]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesNewIssues": {
     "auth_ref": [
      "r11",
      "r12",
      "r135",
      "r136"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of new stock issued during the period.",
        "label": "Stock Issued During Period, Shares, New Issues",
        "terseLabel": "Issuance of common stock under public offering, net of issuance costs (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITYAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation": {
     "auth_ref": [
      "r11",
      "r12",
      "r135",
      "r136"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.",
        "label": "Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures",
        "terseLabel": "Issuance of common stock upon exercise of stock options and in connection with restricted stock units, net of tax (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation": {
     "auth_ref": [
      "r11",
      "r12",
      "r136",
      "r154",
      "r156"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.",
        "label": "Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures",
        "terseLabel": "Issuance of common stock upon exercise of stock options and in connection with restricted stock units, net of tax"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r12",
      "r16",
      "r17",
      "r98"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "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": "Stockholders' Equity Attributable to Parent",
        "totalLabel": "Total Sangamo Therapeutics, Inc. stockholders' equity"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r186",
      "r187",
      "r195"
     ],
     "calculation": {
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET": {
       "order": 3.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.",
        "label": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest",
        "periodEndLabel": "Ending Balances",
        "periodStartLabel": "Beginning Balances",
        "totalLabel": "Total stockholders' equity"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET",
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]",
        "terseLabel": "Stockholders' equity:"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDBALANCESHEET"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityNoteDisclosureTextBlock": {
     "auth_ref": [
      "r138"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.",
        "label": "Stockholders' Equity Note Disclosure [Text Block]",
        "terseLabel": "STOCKHOLDERS' EQUITY"
       }
      }
     },
     "localname": "StockholdersEquityNoteDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/STOCKHOLDERSEQUITY"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SubsequentEventLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.",
        "label": "Subsequent Event [Line Items]",
        "terseLabel": "Subsequent Event [Line Items]"
       }
      }
     },
     "localname": "SubsequentEventLineItems",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identifies event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event [Member]",
        "terseLabel": "Subsequent Event"
       }
      }
     },
     "localname": "SubsequentEventMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventTable": {
     "auth_ref": [
      "r231"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Discloses pertinent information about one or more significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued.",
        "label": "Subsequent Event [Table]",
        "terseLabel": "Subsequent Event [Table]"
       }
      }
     },
     "localname": "SubsequentEventTable",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeAxis": {
     "auth_ref": [
      "r231"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event Type [Axis]",
        "terseLabel": "Subsequent Event Type [Axis]"
       }
      }
     },
     "localname": "SubsequentEventTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeDomain": {
     "auth_ref": [
      "r231"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event Type [Domain]",
        "terseLabel": "Subsequent Event Type [Domain]"
       }
      }
     },
     "localname": "SubsequentEventTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Subsequent Events [Abstract]",
        "terseLabel": "Subsequent Events [Abstract]"
       }
      }
     },
     "localname": "SubsequentEventsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventsTextBlock": {
     "auth_ref": [
      "r232"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.",
        "label": "Subsequent Events [Text Block]",
        "terseLabel": "SUBSEQUENT EVENTS"
       }
      }
     },
     "localname": "SubsequentEventsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/SUBSEQUENTEVENTS"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": {
     "auth_ref": [
      "r237"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms.",
        "label": "Financial Instruments [Domain]",
        "terseLabel": "Financial Instruments"
       }
      }
     },
     "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TypeOfArrangementAxis": {
     "auth_ref": [
      "r184"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements.",
        "label": "Type of Arrangement and Non-arrangement Transactions [Axis]",
        "terseLabel": "Type of Arrangement and Non-arrangement Transactions",
        "verboseLabel": "Type of Arrangement and Non-arrangement Transactions"
       }
      }
     },
     "localname": "TypeOfArrangementAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSAdditionalInformationDetail",
      "http://www.sangamo.com/role/MAJORCUSTOMERSPARTNERSHIPSANDSTRATEGICALLIANCESAdditionalInformationDetail",
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetail",
      "http://www.sangamo.com/role/SUBSEQUENTEVENTSAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember": {
     "auth_ref": [
      "r148",
      "r242"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debentures, bonds and other debt securities issued by US government sponsored entities (GSEs), for example, but not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB). Excludes debt issued by the Government National Mortgage Association (GNMA or Ginnie Mae).",
        "label": "US Government-sponsored Enterprises Debt Securities [Member]",
        "terseLabel": "U.S. government-sponsored entity debt securities"
       }
      }
     },
     "localname": "USGovernmentSponsoredEnterprisesDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CASHEQUIVALENTSANDMARKETABLESECURITIESSummaryofCashEquivalentsandAvailableforSaleSecuritiesDetail",
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofFairValueMeasurementsofCashEquivalentsAvailableforSaleMarketableSecuritiesandFreeShareAssetLiabilityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UseOfEstimates": {
     "auth_ref": [
      "r80",
      "r81",
      "r83",
      "r84",
      "r88",
      "r89",
      "r90"
     ],
     "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]",
        "terseLabel": "Use of Estimates"
       }
      }
     },
     "localname": "UseOfEstimates",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ORGANIZATIONBASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ValuationTechniqueAxis": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by valuation approach and technique.",
        "label": "Valuation Approach and Technique [Axis]",
        "terseLabel": "Valuation Approach and Technique"
       }
      }
     },
     "localname": "ValuationTechniqueAxis",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ValuationTechniqueDomain": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Valuation approach and technique.",
        "label": "Valuation Approach and Technique [Domain]",
        "terseLabel": "Valuation Approach and Technique"
       }
      }
     },
     "localname": "ValuationTechniqueDomain",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ValuationTechniqueOptionPricingModelMember": {
     "auth_ref": [
      "r203"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Valuation technique calculating price of option.",
        "label": "Valuation Technique, Option Pricing Model [Member]",
        "terseLabel": "Option Pricing Method"
       }
      }
     },
     "localname": "ValuationTechniqueOptionPricingModelMember",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/ACQUISITIONOFSANGAMOTHERAPEUTICSFRANCESASAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VariableLeaseCost": {
     "auth_ref": [
      "r224",
      "r230"
     ],
     "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",
        "terseLabel": "Variable lease expense"
       }
      }
     },
     "localname": "VariableLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_WarrantsAndRightsOutstandingMeasurementInput": {
     "auth_ref": [
      "r204"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.",
        "label": "Warrants and Rights Outstanding, Measurement Input",
        "terseLabel": "Estimated Correlation Sangamo and Sangamo France Stock Prices"
       }
      }
     },
     "localname": "WarrantsAndRightsOutstandingMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/FAIRVALUEMEASUREMENTSSummaryofEstimatedFairValueofFreeSharesValuationAssumptionsDetail"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).",
        "label": "Weighted Average Number of Shares Outstanding, Basic and Diluted",
        "terseLabel": "Shares used in computing basic and diluted net loss per share attributable to Sangamo Therapeutics, Inc. stockholders (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfShareOutstandingBasicAndDiluted",
     "nsuri": "http://fasb.org/us-gaap/2018-01-31",
     "presentation": [
      "http://www.sangamo.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "sharesItemType"
    }
   },
   "unitCount": 11
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "205",
   "URI": "http://asc.fasb.org/topic&trid=2122149"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765"
  },
  "r10": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=109979856&loc=d3e26626-111562"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=109979856&loc=SL6284422-111562"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aa)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563"
  },
  "r107": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563"
  },
  "r11": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27340-111563"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)-(d)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "320",
   "URI": "http://asc.fasb.org/topic&trid=2196928"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975"
  },
  "r12": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "((a)(1),(b))",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226317&loc=d3e202-110218"
  },
  "r127": {
   "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"
  },
  "r128": {
   "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"
  },
  "r129": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r13": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.CC)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=27011434&loc=d3e125687-122742"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "http://asc.fasb.org/topic&trid=2144648"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "http://asc.fasb.org/topic&trid=2127136"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=99376301&loc=SL5988623-112600"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644"
  },
  "r136": {
   "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=27012166&loc=d3e187085-122770"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "50",
   "Topic": "505",
   "URI": "http://asc.fasb.org/subtopic&trid=2208855"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "505",
   "URI": "http://asc.fasb.org/topic&trid=2208762"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044"
  },
  "r14": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=108792157&loc=SL49130690-203046-203046"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=108792157&loc=SL49130690-203046-203046"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(ii)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920"
  },
  "r149": {
   "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=108410482&loc=d3e1928-114920"
  },
  "r15": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19A",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=107668666&loc=SL79513924-113897"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=79507207&loc=d3e4534-113899"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901"
  },
  "r158": {
   "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=109197908&loc=d3e5070-113901"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901"
  },
  "r16": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r160": {
   "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=115993241&loc=d3e301413-122809"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=109196918&loc=d3e11149-113907"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=109196918&loc=d3e11178-113907"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "718",
   "URI": "http://asc.fasb.org/topic&trid=2228938"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "730",
   "URI": "http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "730",
   "URI": "http://asc.fasb.org/extlink&oid=6420387&loc=d3e23199-108380"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "730",
   "URI": "http://asc.fasb.org/extlink&oid=6420387&loc=d3e23199-108380"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "730",
   "URI": "http://asc.fasb.org/extlink&oid=6420387&loc=d3e23221-108380"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84176650&loc=d3e31917-109318"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84176650&loc=d3e31931-109318"
  },
  "r17": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "740",
   "URI": "http://asc.fasb.org/topic&trid=2144680"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "10",
   "Subparagraph": "(a)-(d)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=6909625&loc=d3e227-128457"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "37",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=108330185&loc=d3e2207-128464"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)(1)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472"
  },
  "r18": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "30",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "30",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "805",
   "URI": "http://asc.fasb.org/topic&trid=2303972"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "808",
   "URI": "http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "808",
   "URI": "http://asc.fasb.org/topic&trid=5833765"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(7))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4613674-111683"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r193": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r194": {
   "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"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4I",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=84234705&loc=SL4590271-111686"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "810",
   "URI": "http://asc.fasb.org/topic&trid=2197479"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765"
  },
  "r20": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(2)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=SL7498348-110258"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "820",
   "URI": "http://asc.fasb.org/topic&trid=2155941"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611"
  },
  "r21": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(b,c)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=109240241&loc=d3e32211-110900"
  },
  "r214": {
   "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"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "40",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888415&loc=SL77918607-209975"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977"
  },
  "r22": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918666-209980"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(1)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(2)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(4)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980"
  },
  "r23": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "53",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "855",
   "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "855",
   "URI": "http://asc.fasb.org/topic&trid=2122774"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719"
  },
  "r237": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746"
  },
  "r238": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "940",
   "URI": "http://asc.fasb.org/subtopic&trid=2176304"
  },
  "r239": {
   "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=6876686&loc=d3e534808-122878"
  },
  "r24": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(22))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r241": {
   "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=6876686&loc=d3e534808-122878"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(6)(a)(1))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.17)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r244": {
   "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=114873765&loc=SL114874048-224260"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62652-112803"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/subtopic&trid=2209399"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "825",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=108315417&loc=d3e61044-112788"
  },
  "r25": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r250": {
   "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=6879938&loc=d3e572229-122910"
  },
  "r251": {
   "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=6879938&loc=d3e572229-122910"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(24))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910"
  },
  "r253": {
   "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=6879938&loc=d3e572229-122910"
  },
  "r254": {
   "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=6879938&loc=d3e572229-122910"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.(a),19)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910"
  },
  "r256": {
   "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=114873790&loc=SL114874131-224263"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99384497&loc=SL65671331-158438"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "825",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99380617&loc=SL75241803-196195"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "946",
   "URI": "http://asc.fasb.org/subtopic&trid=2324412"
  },
  "r26": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r260": {
   "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=6589523&loc=d3e617274-123014"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "305",
   "Topic": "954",
   "URI": "http://asc.fasb.org/extlink&oid=84242212&loc=d3e2352-115587"
  },
  "r262": {
   "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=6590653&loc=d3e638233-123024"
  },
  "r263": {
   "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"
  },
  "r264": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r265": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r266": {
   "Name": "Form 10-Q",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-13"
  },
  "r267": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1-"
  },
  "r268": {
   "Name": "Regulation 12B",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r269": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r27": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r28": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r29": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6801-107765"
  },
  "r30": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r31": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r32": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r33": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226024-175313"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6812-107765"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL34724394-108580"
  },
  "r43": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e557-108580"
  },
  "r48": {
   "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=115205541&loc=SL114868664-224227"
  },
  "r49": {
   "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=115205541&loc=SL114868664-224227"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6911-107765"
  },
  "r50": {
   "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=115205541&loc=SL114868664-224227"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3000-108585"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4273-108586"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(m)(1)(iii))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690"
  },
  "r7": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "http://asc.fasb.org/topic&trid=2122369"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21843-107793"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1337-109256"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "260",
   "URI": "http://asc.fasb.org/topic&trid=2144383"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "270",
   "URI": "http://asc.fasb.org/extlink&oid=109236672&loc=d3e777-108305"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.10-01(a)(5))",
   "Topic": "270",
   "URI": "http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.10-01.(a)(5))",
   "Topic": "270",
   "URI": "http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699"
  },
  "r8": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r80": {
   "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"
  },
  "r81": {
   "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"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r83": {
   "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"
  },
  "r84": {
   "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"
  },
  "r85": {
   "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"
  },
  "r86": {
   "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"
  },
  "r87": {
   "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"
  },
  "r88": {
   "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"
  },
  "r89": {
   "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"
  },
  "r9": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r90": {
   "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"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "275",
   "URI": "http://asc.fasb.org/topic&trid=2134479"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "10",
   "Topic": "305",
   "URI": "http://asc.fasb.org/extlink&oid=6375392&loc=d3e26790-107797"
  },
  "r98": {
   "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=27010918&loc=d3e74512-122707"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562"
  }
 },
 "version": "2.1"
}
