{
 "instance": {
  "kalv-20220430.htm": {
   "axisCustom": 0,
   "axisStandard": 18,
   "contextCount": 122,
   "dts": {
    "calculationLink": {
     "local": [
      "kalv-20220430_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "kalv-20220430_def.xml"
     ]
    },
    "inline": {
     "local": [
      "kalv-20220430.htm"
     ]
    },
    "labelLink": {
     "local": [
      "kalv-20220430_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "kalv-20220430_pre.xml"
     ]
    },
    "schema": {
     "local": [
      "kalv-20220430.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-roles-2022.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-types-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-types-2022.xsd",
      "https://xbrl.sec.gov/country/2022/country-2022.xsd",
      "https://xbrl.sec.gov/dei/2022/dei-2022.xsd",
      "https://xbrl.sec.gov/stpr/2022/stpr-2022.xsd"
     ]
    }
   },
   "elementCount": 447,
   "entityCount": 1,
   "hidden": {
    "http://fasb.org/us-gaap/2022": 3,
    "http://xbrl.sec.gov/dei/2022": 9,
    "total": 12
   },
   "keyCustom": 34,
   "keyStandard": 260,
   "memberCustom": 12,
   "memberStandard": 32,
   "nsprefix": "kalv",
   "nsuri": "http://www.kalvista.com/20220430",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "100000 - Document - Document and Entity Information",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation",
     "shortName": "Document and Entity Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100100 - Disclosure - Marketable Securities",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecurities",
     "shortName": "Marketable Securities",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "kalv:PrepaidExpenseAndOtherAssetsCurrentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100110 - Disclosure - Prepaid Expenses and Other Current Assets",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssets",
     "shortName": "Prepaid Expenses and Other Current Assets",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "kalv:PrepaidExpenseAndOtherAssetsCurrentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100120 - Disclosure - Property and Equipment",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipment",
     "shortName": "Property and Equipment",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100130 - Disclosure - Accrued Expenses",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpenses",
     "shortName": "Accrued Expenses",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100140 - Disclosure - Stockholder's Equity",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockholdersEquity1",
     "shortName": "Stockholder's Equity",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100150 - Disclosure - Stock-Based Compensation",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensation",
     "shortName": "Stock-Based Compensation",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100160 - Disclosure - Commitments and Contingencies",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingencies",
     "shortName": "Commitments and Contingencies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100170 - Disclosure - Leases",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeases",
     "shortName": "Leases",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100180 - Disclosure - Income Taxes",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxes",
     "shortName": "Income Taxes",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100190 - Disclosure - Defined Contribution Plans",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlans",
     "shortName": "Defined Contribution Plans",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100010 - Statement - Consolidated Balance Sheets",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets",
     "shortName": "Consolidated Balance Sheets",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherNonoperatingIncomeAndExpenseTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100200 - Disclosure - Other Income",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncome",
     "shortName": "Other Income",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherNonoperatingIncomeAndExpenseTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SubsequentEventsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100210 - Disclosure - Subsequent Events",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEvents1",
     "shortName": "Subsequent Events",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SubsequentEventsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ConsolidationPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100220 - Disclosure - Summary of Significant Accounting Policies (Policies)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies",
     "shortName": "Summary of Significant Accounting Policies (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ConsolidationPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "kalv:ScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100230 - Disclosure - Summary of Significant Accounting Policies (Tables)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesTables",
     "shortName": "Summary of Significant Accounting Policies (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "kalv:ScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100240 - Disclosure - Marketable Securities (Tables)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesTables",
     "shortName": "Marketable Securities (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "kalv:PrepaidExpenseAndOtherAssetsCurrentTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100250 - Disclosure - Prepaid Expenses and Other Current Assets (Tables)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsTables",
     "shortName": "Prepaid Expenses and Other Current Assets (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "kalv:PrepaidExpenseAndOtherAssetsCurrentTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100260 - Disclosure - Property and Equipment (Tables)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentTables",
     "shortName": "Property and Equipment (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100270 - Disclosure - Accrued Expenses (Tables)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesTables",
     "shortName": "Accrued Expenses (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LeaseCostTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100280 - Disclosure - Leases (Tables)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesTables",
     "shortName": "Leases (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LeaseCostTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100290 - Disclosure - Income Taxes (Tables)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesTables",
     "shortName": "Income Taxes (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:CommonStockParOrStatedValuePerShare",
      "reportCount": 1,
      "unitRef": "U_UnitedStatesOfAmericaDollarsShare",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100030 - Statement - Consolidated Balance Sheets (Parenthetical)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical",
     "shortName": "Consolidated Balance Sheets (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:CommonStockSharesAuthorized",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_shares",
      "xsiNil": "false"
     }
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100300 - Disclosure - Stock-Based Compensation (Tables)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationTables",
     "shortName": "Stock-Based Compensation (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RetainedEarningsAccumulatedDeficit",
      "reportCount": 1,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100310 - Disclosure - Description of Business and Basis of Presentation - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDescriptionOfBusinessAndBasisOfPresentationAdditionalInformationDetail",
     "shortName": "Description of Business and Basis of Presentation - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:BusinessDescriptionAndBasisOfPresentationTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-5",
      "lang": null,
      "name": "kalv:CashCashEquivalentsAndMarketableSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:IncomeTaxPolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:UnrecognizedTaxBenefits",
      "reportCount": 1,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100320 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail",
     "shortName": "Summary of Significant Accounting Policies - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:IncomeTaxPolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_76e065e0-c0bc-464c-a56a-88a318c6cebf",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentUsefulLife",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100330 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Life of Property and Equipment (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail",
     "shortName": "Summary of Significant Accounting Policies - Estimated Useful Life of Property and Equipment (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_76e065e0-c0bc-464c-a56a-88a318c6cebf",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentUsefulLife",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock",
       "div",
       "us-gaap:EarningsPerSharePolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_cfeabaa8-5757-4a60-bc46-9b5540109c34",
      "decimals": "0",
      "first": true,
      "lang": null,
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100340 - Disclosure - Summary of Significant Accounting Policies - Schedule of Potential Dilutive Common Share Equivalents (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentialDilutiveCommonShareEquivalentsDetail",
     "shortName": "Summary of Significant Accounting Policies - Schedule of Potential Dilutive Common Share Equivalents (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock",
       "div",
       "us-gaap:EarningsPerSharePolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_cfeabaa8-5757-4a60-bc46-9b5540109c34",
      "decimals": "0",
      "first": true,
      "lang": null,
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_shares",
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfCashCashEquivalentsAndShortTermInvestmentsTableTextBlock",
       "div",
       "us-gaap:FairValueMeasurementPolicyPolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100350 - Disclosure - Summary of Significant Accounting Policies - Schedule of Cash Equivalents and Marketable Securities Measured at Fair Value (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail",
     "shortName": "Summary of Significant Accounting Policies - Schedule of Cash Equivalents and Marketable Securities Measured at Fair Value (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfCashCashEquivalentsAndShortTermInvestmentsTableTextBlock",
       "div",
       "us-gaap:FairValueMeasurementPolicyPolicyTextBlock",
       "div",
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock",
       "div",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100360 - Disclosure - Marketable Securities - Summary of Fair Value of Company's Investments By Type (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail",
     "shortName": "Marketable Securities - Summary of Fair Value of Company's Investments By Type (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock",
       "div",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock",
       "div",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100370 - Disclosure - Marketable Securities - Summary of Company's Investments with Unrealized Losses, Aggregated by Investment Type (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail",
     "shortName": "Marketable Securities - Summary of Company's Investments with Unrealized Losses, Aggregated by Investment Type (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock",
       "div",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "div",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100380 - Disclosure - Marketable Securities - Summary of Scheduled Maturity for Marketable Securities (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail",
     "shortName": "Marketable Securities - Summary of Scheduled Maturity for Marketable Securities (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "div",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock",
       "div",
       "kalv:PrepaidExpenseAndOtherAssetsCurrentTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:PrepaidExpenseCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100390 - Disclosure - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails",
     "shortName": "Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock",
       "div",
       "kalv:PrepaidExpenseAndOtherAssetsCurrentTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:PrepaidExpenseCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_47cf2928-d99a-4665-87f0-e031f0248ba0",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100040 - Statement - Consolidated Statements of Operations and Comprehensive Loss",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss",
     "shortName": "Consolidated Statements of Operations and Comprehensive Loss",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_47cf2928-d99a-4665-87f0-e031f0248ba0",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:PropertyPlantAndEquipmentTextBlock",
       "div",
       "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:PropertyPlantAndEquipmentGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100400 - Disclosure - Property and Equipment - Components of Property and Equipment (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail",
     "shortName": "Property and Equipment - Components of Property and Equipment (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:PropertyPlantAndEquipmentTextBlock",
       "div",
       "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:PropertyPlantAndEquipmentGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DepreciationDepletionAndAmortization",
      "reportCount": 1,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100410 - Disclosure - Property and Equipment - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail",
     "shortName": "Property and Equipment - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock",
       "div",
       "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "kalv:AccruedResearchExpenseCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100420 - Disclosure - Accrued Expenses - Schedule of Accrued Expenses (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail",
     "shortName": "Accrued Expenses - Schedule of Accrued Expenses (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock",
       "div",
       "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "kalv:AccruedResearchExpenseCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_b788b1cb-63b8-4be9-aa0c-724158e20485",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockIssuedDuringPeriodSharesNewIssues",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100430 - Disclosure - Stockholder's Equity - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail",
     "shortName": "Stockholder's Equity - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_b788b1cb-63b8-4be9-aa0c-724158e20485",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockIssuedDuringPeriodSharesNewIssues",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_shares",
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "kalv:NumberOfEquityBasedCompensationPlans",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_Plan",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100440 - Disclosure - Stock-Based Compensation - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail",
     "shortName": "Stock-Based Compensation - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "kalv:NumberOfEquityBasedCompensationPlans",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_Plan",
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock",
       "div",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "4",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_pure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100450 - Disclosure - Stock-Based Compensation - Schedule of Fair Value of Share-based Awards Measured with Weighted-Average Assumptions (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfFairValueOfSharebasedAwardsMeasuredWithWeightedaverageAssumptionsDetail",
     "shortName": "Stock-Based Compensation - Schedule of Fair Value of Share-based Awards Measured with Weighted-Average Assumptions (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock",
       "div",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "4",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_pure",
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AllocatedShareBasedCompensationExpense",
      "reportCount": 1,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100460 - Disclosure - Stock-Based Compensation - Schedule of Stock-Based Compensation Expense (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfStockbasedCompensationExpenseDetail",
     "shortName": "Stock-Based Compensation - Schedule of Stock-Based Compensation Expense (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock",
       "div",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_50911588-215c-47c1-81ac-11f68aaf7c3e",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:AllocatedShareBasedCompensationExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "div",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_17ac03de-14bb-4863-8497-dc28916ee10e",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
      "reportCount": 1,
      "unitRef": "U_shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100470 - Disclosure - Stock-Based Compensation - Summary of Option Activity (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail",
     "shortName": "Stock-Based Compensation - Summary of Option Activity (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "div",
       "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_shares",
      "xsiNil": "false"
     }
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "kalv:ContractualObligationRemainingCommitmentIncludingCancellationProvisions",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100480 - Disclosure - Commitments and Contingencies - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail",
     "shortName": "Commitments and Contingencies - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "kalv:ContractualObligationRemainingCommitmentIncludingCancellationProvisions",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_23bf4732-1b14-499a-8c79-afe5958ded1d",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100490 - Disclosure - Leases - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail",
     "shortName": "Leases - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_23bf4732-1b14-499a-8c79-afe5958ded1d",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_fcf49b6c-0d97-41bf-a29c-b29e87dab9b3",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100050 - Statement - Consolidated Statements of Changes in Stockholders' Equity",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity",
     "shortName": "Consolidated Statements of Changes in Stockholders' Equity",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_fcf49b6c-0d97-41bf-a29c-b29e87dab9b3",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:LeaseCostTableTextBlock",
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100500 - Disclosure - Leases - Summary of Lease Costs (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail",
     "shortName": "Leases - Summary of Lease Costs (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:LeaseCostTableTextBlock",
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100510 - Disclosure - Leases - Summary of Maturity of Undiscounted Payments Due Under Lease Liabilities and Present Value of Liabilities (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail",
     "shortName": "Leases - Summary of Maturity of Undiscounted Payments Due Under Lease Liabilities and Present Value of Liabilities (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "kalv:SummaryOfLeaseTermAndDiscountRateTableTextBlock",
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseWeightedAverageRemainingLeaseTerm1",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100520 - Disclosure - Leases - Summary of Lease Term and Discount Rate (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseTermAndDiscountRateDetail",
     "shortName": "Leases - Summary of Lease Term and Discount Rate (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "kalv:SummaryOfLeaseTermAndDiscountRateTableTextBlock",
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseWeightedAverageRemainingLeaseTerm1",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R53": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "kalv:ScheduleOfCashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesTableTextBlock",
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeasePayments",
      "reportCount": 1,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100530 - Disclosure - Leases - Summary of Cash Paid for Amounts Included in Measurement of Lease Liabilities (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfCashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesDetail",
     "shortName": "Leases - Summary of Cash Paid for Amounts Included in Measurement of Lease Liabilities (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R54": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock",
       "div",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100540 - Disclosure - Income Taxes - Schedule of Components of the Company's Loss Before Income Taxes (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfTheCompanysLossBeforeIncomeTaxesDetail",
     "shortName": "Income Taxes - Schedule of Components of the Company's Loss Before Income Taxes (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock",
       "div",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R55": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:IncomeTaxExpenseBenefit",
       "span",
       "p",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeTaxExpenseBenefit",
      "reportCount": 1,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100550 - Disclosure - Income Taxes - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail",
     "shortName": "Income Taxes - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:ValuationAllowanceDeferredTaxAssetChangeInAmount",
       "span",
       "p",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:ValuationAllowanceDeferredTaxAssetChangeInAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R56": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
       "div",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_pure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100560 - Disclosure - Income Taxes - Schedule of Reconciliation between Effective Tax Rates and Statutory Rates (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail",
     "shortName": "Income Taxes - Schedule of Reconciliation between Effective Tax Rates and Statutory Rates (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
       "div",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_pure",
      "xsiNil": "false"
     }
    },
    "R57": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock",
       "div",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DeferredTaxAssetsOperatingLossCarryforwards",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100570 - Disclosure - Income Taxes - Schedule of Tax Effect of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail",
     "shortName": "Income Taxes - Schedule of Tax Effect of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock",
       "div",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DeferredTaxAssetsOperatingLossCarryforwards",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R58": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_4ffd079d-8241-472f-a79d-45ecd56e3c18",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedContributionPlanEmployerMatchingContributionPercentOfMatch",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_pure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100580 - Disclosure - Defined Contribution Plans - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail",
     "shortName": "Defined Contribution Plans - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_4ffd079d-8241-472f-a79d-45ecd56e3c18",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedContributionPlanEmployerMatchingContributionPercentOfMatch",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_pure",
      "xsiNil": "false"
     }
    },
    "R59": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_738b9104-57fc-482c-9f8b-afdf287cf894",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "kalv:ResearchAndDevelopmentTaxCreditsReceivable",
      "reportCount": 1,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100590 - Disclosure - Other Income - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail",
     "shortName": "Other Income - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:OtherNonoperatingIncomeAndExpenseTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_55c3b0ef-9a50-428b-b02d-08ae80bdc0e7",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_a1cbbbed-1a22-40c7-b909-b9ecc2cfd673",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "kalv:Stockissuancecosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100060 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical",
     "shortName": "Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_a1cbbbed-1a22-40c7-b909-b9ecc2cfd673",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "kalv:Stockissuancecosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R60": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "kalv:ScheduleOfCashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesTableTextBlock",
       "div",
       "kalv:LesseeOperatingAndFinanceLeasesTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:OperatingLeasePayments",
      "reportCount": 1,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100600 - Disclosure - Subsequent Events - Additional Information (Detail)",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail",
     "shortName": "Subsequent Events - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "us-gaap:SubsequentEventsTextBlock",
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_e79680ec-6496-4fcc-80a2-d3d2ef4f06d1",
      "decimals": null,
      "lang": "en-US",
      "name": "us-gaap:LeaseExpirationDate1",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100070 - Statement - Consolidated Statements of Cash Flows",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows",
     "shortName": "Consolidated Statements of Cash Flows",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_USD",
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessDescriptionAndBasisOfPresentationTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100080 - Disclosure - Description of Business and Basis of Presentation",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDescriptionOfBusinessAndBasisOfPresentation",
     "shortName": "Description of Business and Basis of Presentation",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessDescriptionAndBasisOfPresentationTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100090 - Disclosure - Summary of Significant Accounting Policies",
     "role": "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies",
     "shortName": "Summary of Significant Accounting Policies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "baseRef": "kalv-20220430.htm",
      "contextRef": "C_f14987a2-7c31-4079-aff6-d1be3a645760",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 44,
   "tag": {
    "country_GB": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "UNITED KINGDOM",
        "terseLabel": "United Kingdom [Member]"
       }
      }
     },
     "localname": "GB",
     "nsuri": "http://xbrl.sec.gov/country/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_AuditorFirmId": {
     "auth_ref": [
      "r595",
      "r596",
      "r597"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "PCAOB issued Audit Firm Identifier",
        "label": "Auditor Firm ID"
       }
      }
     },
     "localname": "AuditorFirmId",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "nonemptySequenceNumberItemType"
    },
    "dei_AuditorLocation": {
     "auth_ref": [
      "r595",
      "r596",
      "r597"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Auditor Location"
       }
      }
     },
     "localname": "AuditorLocation",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "internationalNameItemType"
    },
    "dei_AuditorName": {
     "auth_ref": [
      "r595",
      "r596",
      "r597"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Auditor Name"
       }
      }
     },
     "localname": "AuditorName",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "internationalNameItemType"
    },
    "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CoverAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cover page.",
        "label": "Cover [Abstract]"
       }
      }
     },
     "localname": "CoverAbstract",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "dei_DocumentAnnualReport": {
     "auth_ref": [
      "r595",
      "r596",
      "r597"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an annual report.",
        "label": "Document Annual Report"
       }
      }
     },
     "localname": "DocumentAnnualReport",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentFiscalPeriodFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fiscal period values are FY, Q1, Q2, and Q3.  1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.",
        "label": "Document Fiscal Period Focus",
        "terseLabel": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.",
        "label": "Document Fiscal Year Focus",
        "terseLabel": "Document Fiscal Year Focus"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r598"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "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",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_DocumentsIncorporatedByReferenceTextBlock": {
     "auth_ref": [
      "r593"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Documents incorporated by reference.",
        "label": "Documents Incorporated by Reference [Text Block]",
        "terseLabel": "Documents Incorporated by Reference"
       }
      }
     },
     "localname": "DocumentsIncorporatedByReferenceTextBlock",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressAddressLine2": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 2 such as Street or Suite number",
        "label": "Entity Address, Address Line Two",
        "terseLabel": "Entity Address, Address Line Two"
       }
      }
     },
     "localname": "EntityAddressAddressLine2",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r592"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "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",
        "terseLabel": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r592"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r592"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r607"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityPublicFloat": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.",
        "label": "Entity Public Float"
       }
      }
     },
     "localname": "EntityPublicFloat",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "monetaryItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r592"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r592"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r592"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r592"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_EntityVoluntaryFilers": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.",
        "label": "Entity Voluntary Filers"
       }
      }
     },
     "localname": "EntityVoluntaryFilers",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityWellKnownSeasonedIssuer": {
     "auth_ref": [
      "r608"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.",
        "label": "Entity Well-known Seasoned Issuer"
       }
      }
     },
     "localname": "EntityWellKnownSeasonedIssuer",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_IcfrAuditorAttestationFlag": {
     "auth_ref": [
      "r595",
      "r596",
      "r597"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ICFR Auditor Attestation Flag"
       }
      }
     },
     "localname": "IcfrAuditorAttestationFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r591"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r594"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol",
        "verboseLabel": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "kalv_AccruedResearchExpenseCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_AccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accrued research expense current.",
        "label": "Accrued Research Expense Current",
        "terseLabel": "Accrued research expense"
       }
      }
     },
     "localname": "AccruedResearchExpenseCurrent",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_AmountAssociatedWithIndemnification": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount associated with indemnification.",
        "label": "Amount Associated With Indemnification",
        "terseLabel": "Amounts associated with indemnifications"
       }
      }
     },
     "localname": "AmountAssociatedWithIndemnification",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_Annual382LimitationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Annual 382 limitation.",
        "label": "Annual 382 Limitation [Member]",
        "terseLabel": "Annual 382 Limitation [Member]"
       }
      }
     },
     "localname": "Annual382LimitationMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_AtMarketSalesAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "At market sales agreement.",
        "label": "At Market Sales Agreement Member",
        "terseLabel": "At-the-market Sales Agreement [Member]"
       }
      }
     },
     "localname": "AtMarketSalesAgreementMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Available for sale securities debt maturities after one through two years fair value.",
        "label": "Available For Sale Securities Debt Maturities After One Through Two Years Fair Value",
        "terseLabel": "Maturing after one year through two years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_AvailableForSaleSecuritiesDebtMaturitiesAfterTwoThroughSixYearsFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Available for sale securities debt maturities after two through six years fair value.",
        "label": "Available For Sale Securities Debt Maturities After Two Through Six Years Fair Value",
        "terseLabel": "Maturing after two years through six years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterTwoThroughSixYearsFairValue",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_CarriedForwardIndefinitelyMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carried forward indefinitely.",
        "label": "Carried Forward Indefinitely [Member]"
       }
      }
     },
     "localname": "CarriedForwardIndefinitelyMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_CashAndCashEquivalentsAndMarketableSecuritiesFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cash and cash equivalents and marketable securities fair value disclosure.",
        "label": "Cash And Cash Equivalents And Marketable Securities Fair Value Disclosure",
        "terseLabel": "Cash equivalents and marketable securities"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAndMarketableSecuritiesFairValueDisclosure",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_CashCashEquivalentsAndMarketableSecurities": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cash cash equivalents and marketable securities.",
        "label": "Cash Cash Equivalents And Marketable Securities",
        "terseLabel": "Cash, cash equivalents and marketable securities"
       }
      }
     },
     "localname": "CashCashEquivalentsAndMarketableSecurities",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDescriptionOfBusinessAndBasisOfPresentationAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_ContractualObligationRemainingCommitmentIncludingCancellationProvisions": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contractual obligation remaining commitment including cancellation provisions.",
        "label": "Contractual Obligation Remaining Commitment Including Cancellation Provisions",
        "terseLabel": "Contractual obligation remaining commitments including cancellation provisions"
       }
      }
     },
     "localname": "ContractualObligationRemainingCommitmentIncludingCancellationProvisions",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_DeferredTaxAssetsOperatingLeaseLiabilities": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred tax assets operating lease liabilities.",
        "label": "Deferred tax assets operating lease liabilities",
        "terseLabel": "Operating lease liabilities"
       }
      }
     },
     "localname": "DeferredTaxAssetsOperatingLeaseLiabilities",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_DeferredTaxAssetsLiabilitiesNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred tax liabilities operating lease right-of-use assets.",
        "label": "Deferred tax liabilities operating lease right-of-use assets",
        "negatedLabel": "Operating lease - Right-of-use assets",
        "terseLabel": "Operating lease - Right-of-use assets"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail": {
       "order": 4.0,
       "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Effective income tax rate reconciliation global intangible low taxed income.",
        "label": "Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income",
        "terseLabel": "Globl Intangible Low-Taxed Income (\"GILTI\")"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "kalv_EmployeeStockOptionsAndAwardsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Employee stock options and awards.",
        "label": "Employee Stock Options And Awards [Member]",
        "terseLabel": "Stock Options and Awards [Member]"
       }
      }
     },
     "localname": "EmployeeStockOptionsAndAwardsMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentialDilutiveCommonShareEquivalentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_EmployeeStockPurchasePlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Employee stock purchase plan.",
        "label": "Employee Stock Purchase Plan [Member]",
        "terseLabel": "2017 Employee Stock Purchase Plan (ESPP) [Member]"
       }
      }
     },
     "localname": "EmployeeStockPurchasePlanMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_FinanceLeaseCosts": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Finance lease costs.",
        "label": "Finance Lease Costs"
       }
      }
     },
     "localname": "FinanceLeaseCosts",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_GeneralAndAdministrativeExpensesAndResearchAndDevelopmentExpensesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "General and administrative expenses and research and development expenses.",
        "label": "General And Administrative Expenses And Research And Development Expenses [Member]",
        "terseLabel": "General and Administrative Expenses and Research and Development Expenses [Member]"
       }
      }
     },
     "localname": "GeneralAndAdministrativeExpensesAndResearchAndDevelopmentExpensesMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_IncreaseDecreaseInResearchAndDevelopmentTaxCreditReceivable": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Increase decrease in research and development tax credit receivable.",
        "label": "Increase Decrease In Research And Development Tax Credit Receivable",
        "negatedLabel": "Research and development tax credit receivable"
       }
      }
     },
     "localname": "IncreaseDecreaseInResearchAndDevelopmentTaxCreditReceivable",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_LesseeOperatingAndFinanceLeasesTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Lessee operating and finance leases.",
        "label": "Lessee Operating And Finance Leases [Text Block]",
        "terseLabel": "Leases"
       }
      }
     },
     "localname": "LesseeOperatingAndFinanceLeasesTextBlock",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeases"
     ],
     "xbrltype": "textBlockItemType"
    },
    "kalv_MaximumAggregatePublicOfferingPriceOfSecuritiesToBeIssuedUnderShelfRegistrationStatement": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maximum aggregate public offering price of securities to be issued under shelf registration statement.",
        "label": "Maximum Aggregate Public Offering Price Of Securities To Be Issued Under Shelf Registration Statement",
        "terseLabel": "Maximum aggregate public offering price of securities to be issued under shelf registration statement"
       }
      }
     },
     "localname": "MaximumAggregatePublicOfferingPriceOfSecuritiesToBeIssuedUnderShelfRegistrationStatement",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_NetOperatingLosses": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Net operating losses.",
        "label": "Net Operating Losses",
        "verboseLabel": "Net operating losses"
       }
      }
     },
     "localname": "NetOperatingLosses",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_NonCashOperatingLeaseExpense": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Non-cash operating lease expense.",
        "label": "Non Cash Operating Lease Expense",
        "terseLabel": "Non-cash operating lease expense"
       }
      }
     },
     "localname": "NonCashOperatingLeaseExpense",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_NotSubjectToAnnual382LimitationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Not subject to annual 382 limitation.",
        "label": "Not Subject To Annual 382 Limitation [Member]"
       }
      }
     },
     "localname": "NotSubjectToAnnual382LimitationMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_NumberOfEquityBasedCompensationPlans": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of equity based compensation plans.",
        "label": "Number Of Equity Based Compensation Plans",
        "terseLabel": "Number of equity-based compensation plans"
       }
      }
     },
     "localname": "NumberOfEquityBasedCompensationPlans",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "kalv_NumberOfExecutivesEligibleForShareGrant": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of executives eligible for share grant.",
        "label": "Number of executives eligible for share grant"
       }
      }
     },
     "localname": "NumberOfExecutivesEligibleForShareGrant",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "kalv_NumberOfLegacyPlans": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of legacy plans.",
        "label": "Number Of Legacy Plans",
        "terseLabel": "Number of legacy plans"
       }
      }
     },
     "localname": "NumberOfLegacyPlans",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "kalv_OperatingLossCarryForwardsExpirationPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Operating loss carry forwards expiration period.",
        "label": "Operating Loss Carry Forwards Expiration Period",
        "terseLabel": "Operating loss carry forwards expiration period"
       }
      }
     },
     "localname": "OperatingLossCarryForwardsExpirationPeriod",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "gYearItemType"
    },
    "kalv_OperatingLossCarryforwardsOperatingLossUnutilized": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Operating loss carryforwards operating loss unutilized.",
        "label": "Operating Loss Carryforwards Operating Loss Unutilized",
        "terseLabel": "Net operating loss unutilized"
       }
      }
     },
     "localname": "OperatingLossCarryforwardsOperatingLossUnutilized",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_PercentageOfShareEligibleToVest": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of share eligible to vest.",
        "label": "Percentage of share eligible to vest"
       }
      }
     },
     "localname": "PercentageOfShareEligibleToVest",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "kalv_PerformanceBasedRestrictedStockUnitMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Performance based restricted stock unit [Member]",
        "label": "Performance Based Restricted Stock Unit [Member]",
        "terseLabel": "Performance Stock Units [Member]"
       }
      }
     },
     "localname": "PerformanceBasedRestrictedStockUnitMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_PrepaidExpenseAndOtherAssetsCurrentTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for prepaid expense and other current assets.",
        "label": "Prepaid Expense And Other Assets Current Text Block",
        "terseLabel": "Prepaid Expenses and Other Current Assets"
       }
      }
     },
     "localname": "PrepaidExpenseAndOtherAssetsCurrentTextBlock",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssets"
     ],
     "xbrltype": "textBlockItemType"
    },
    "kalv_ResearchAndDevelopmentTaxCreditReceivablePolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Research and development tax credit receivable.",
        "label": "Research And Development Tax Credit Receivable Policy Policy Text Block",
        "terseLabel": "Research and Development Tax Credit Receivable"
       }
      }
     },
     "localname": "ResearchAndDevelopmentTaxCreditReceivablePolicyPolicyTextBlock",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "kalv_ResearchAndDevelopmentTaxCreditsReceivable": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 2.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Research and development tax credits receivable.",
        "label": "Research And Development Tax Credits Receivable",
        "terseLabel": "Research and development tax credit receivable"
       }
      }
     },
     "localname": "ResearchAndDevelopmentTaxCreditsReceivable",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_RoyaltyPaymentObligationsExpirationPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Royalty payment obligations expiration period.",
        "label": "Royalty Payment Obligations Expiration Period",
        "terseLabel": "Royalty payment obligations expiration period"
       }
      }
     },
     "localname": "RoyaltyPaymentObligationsExpirationPeriod",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "kalv_ScheduleOfCashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of cash paid for amounts included in measurement of lease liabilities.",
        "label": "Schedule of Cash Paid for Amounts Included in Measurement of Lease Liabilities [Table Text Block]",
        "terseLabel": "Summary of Cash Paid for Amounts Included in Measurement of Lease Liabilities"
       }
      }
     },
     "localname": "ScheduleOfCashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesTableTextBlock",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "kalv_ScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of estimated useful life of property plant and equipment.",
        "label": "Schedule Of Estimated Useful Life Of Property Plant And Equipment [Table Text Block]",
        "terseLabel": "Estimated Useful Life of Property and Equipment"
       }
      }
     },
     "localname": "ScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentTableTextBlock",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "kalv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesReservedForGrant": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award number of shares reserved for grant.",
        "label": "Share based compensation arrangement by share based payment award number of shares reserved for grant",
        "terseLabel": "Shares reserved for grants"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesReservedForGrant",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "kalv_ShareBasedCompensationArrangementByShareBasedPaymentAwardRecurringGrantsVestingPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award recurring grants vesting period.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Recurring Grants Vesting Period",
        "terseLabel": "Recurring grants vesting period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardRecurringGrantsVestingPeriod",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "kalv_StockIssuedDuringPeriodSharesAtMarketSalesAgreementNetOfIssuanceCosts": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock issued during period shares at market sales agreement net of issuance costs.",
        "label": "Stock Issued During Period Shares at Market Sales Agreement Net of Issuance Costs",
        "terseLabel": "Issuance of common shares under an at-the-market sales agreement, net of issuance costs of $132, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesAtMarketSalesAgreementNetOfIssuanceCosts",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "kalv_StockIssuedDuringPeriodValueAtMarketSalesAgreementNetOfIssuanceCosts": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock issued during period value at market sales agreement net of issuance costs.",
        "label": "Stock Issued During Period Value At Market Sales Agreement Net Of Issuance Costs",
        "terseLabel": "Issuance of common shares under an at-the-market sales agreement, net of issuance costs of $132"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueAtMarketSalesAgreementNetOfIssuanceCosts",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_Stockissuancecosts": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock issuance Costs",
        "label": "StockIssuanceCosts",
        "terseLabel": "Stock issuance costs"
       }
      }
     },
     "localname": "Stockissuancecosts",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_SubjectTo383LimitationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Subject to 383 limitation.",
        "label": "Subject to 383 Limitation [Member]"
       }
      }
     },
     "localname": "SubjectTo383LimitationMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_SummaryOfLeaseTermAndDiscountRateTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Summary of lease term and discount rate.",
        "label": "Summary of Lease Term and Discount Rate [Table Text Block]",
        "terseLabel": "Summary of Lease Term and Discount Rate"
       }
      }
     },
     "localname": "SummaryOfLeaseTermAndDiscountRateTableTextBlock",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "kalv_TaxCreditCarryForwardCreditsToExpireUnutilized": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tax credit carry forward credits to expire unutilized.",
        "label": "Tax Credit Carry Forward Credits to Expire Unutilized",
        "terseLabel": "Credit to expire unutilized"
       }
      }
     },
     "localname": "TaxCreditCarryForwardCreditsToExpireUnutilized",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_TaxCreditCarryForwardCreditsToUtilize": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tax credit carry forward credits to utilize.",
        "label": "Tax Credit Carry Forward Credits to Utilize",
        "terseLabel": "Tax credits to utilize"
       }
      }
     },
     "localname": "TaxCreditCarryForwardCreditsToUtilize",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "kalv_TwentyTwentyOneEquityInducementPlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "2021 Equity Inducement Plan [Member]",
        "label": "Twenty Twenty One Equity Inducement Plan [Member]",
        "terseLabel": "2021 Equity Inducement Plan [Member]"
       }
      }
     },
     "localname": "TwentyTwentyOneEquityInducementPlanMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_TwoThousandAndSeventeenEquityIncentivePlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Two thousand and seventeen equity incentive plan.",
        "label": "Two Thousand And Seventeen Equity Incentive Plan [Member]",
        "terseLabel": "2017 Equity Incentive Plan [Member]"
       }
      }
     },
     "localname": "TwoThousandAndSeventeenEquityIncentivePlanMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_UKEmployeesPersonalPensionPlanAndUSEmployees401KPlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "U.K Employees Personal Pension Plan and U.S Employees 401 K Plan.",
        "label": "U.K Employees Personal Pension Plan And U.S Employees 401 K Plan [Member]",
        "terseLabel": "U.K. Employees Personal Pension Plan and U.S. Employees 401(K) Plan [Member]"
       }
      }
     },
     "localname": "UKEmployeesPersonalPensionPlanAndUSEmployees401KPlanMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "kalv_USEmployees401KPlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "US Employees 401K Plan.",
        "label": "U S Employees 401K Plan Member",
        "terseLabel": "U.S. Employees 401(K) Plan [Member]"
       }
      }
     },
     "localname": "USEmployees401KPlanMember",
     "nsuri": "http://www.kalvista.com/20220430",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [
      "r209",
      "r211",
      "r212",
      "r213",
      "r230",
      "r237",
      "r331",
      "r337",
      "r491",
      "r492",
      "r493",
      "r494",
      "r495",
      "r496",
      "r515",
      "r548",
      "r550",
      "r588",
      "r589"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum [Member]",
        "terseLabel": "Maximum [Member]"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [
      "r209",
      "r211",
      "r212",
      "r213",
      "r230",
      "r237",
      "r331",
      "r337",
      "r491",
      "r492",
      "r493",
      "r494",
      "r495",
      "r496",
      "r515",
      "r548",
      "r550",
      "r588",
      "r589"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Minimum [Member]",
        "terseLabel": "Minimum [Member]"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [
      "r201",
      "r209",
      "r211",
      "r212",
      "r213",
      "r230",
      "r237",
      "r278",
      "r331",
      "r337",
      "r371",
      "r372",
      "r373",
      "r491",
      "r492",
      "r493",
      "r494",
      "r495",
      "r496",
      "r515",
      "r548",
      "r550",
      "r588",
      "r589"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statistical Measurement [Axis]",
        "terseLabel": "Statistical Measurement"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [
      "r201",
      "r209",
      "r211",
      "r212",
      "r213",
      "r230",
      "r237",
      "r278",
      "r331",
      "r337",
      "r371",
      "r372",
      "r373",
      "r491",
      "r492",
      "r493",
      "r494",
      "r495",
      "r496",
      "r515",
      "r548",
      "r550",
      "r588",
      "r589"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statistical Measurement [Domain]",
        "terseLabel": "Statistical Measurement"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_SegmentGeographicalDomain": {
     "auth_ref": [
      "r153",
      "r154",
      "r255",
      "r256",
      "r549",
      "r579",
      "r580",
      "r581",
      "r582",
      "r583",
      "r584",
      "r585",
      "r586",
      "r587"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographical [Domain]",
        "terseLabel": "Geographical"
       }
      }
     },
     "localname": "SegmentGeographicalDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_StatementGeographicalAxis": {
     "auth_ref": [
      "r153",
      "r154",
      "r255",
      "r256",
      "r549",
      "r574",
      "r579",
      "r580",
      "r581",
      "r582",
      "r583",
      "r584",
      "r585",
      "r586",
      "r587"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographical [Axis]",
        "terseLabel": "Geographical"
       }
      }
     },
     "localname": "StatementGeographicalAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "stpr_MA": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "MASSACHUSETTS",
        "terseLabel": "Massachusetts [Member]"
       }
      }
     },
     "localname": "MA",
     "nsuri": "http://xbrl.sec.gov/stpr/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "stpr_UT": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "UTAH",
        "verboseLabel": "Utah [Member]"
       }
      }
     },
     "localname": "UT",
     "nsuri": "http://xbrl.sec.gov/stpr/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountingPoliciesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Accounting Policies [Abstract]"
       }
      }
     },
     "localname": "AccountingPoliciesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock": {
     "auth_ref": [
      "r29"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period.",
        "label": "Accounts Payable and Accrued Liabilities Disclosure [Text Block]",
        "terseLabel": "Accrued Expenses"
       }
      }
     },
     "localname": "AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpenses"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_AccountsPayableCurrent": {
     "auth_ref": [
      "r28",
      "r481"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 0.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Accounts Payable, Current",
        "terseLabel": "Accounts payable",
        "totalLabel": "Accounts Payable, Current, Total"
       }
      }
     },
     "localname": "AccountsPayableCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccruedLiabilitiesCurrent": {
     "auth_ref": [
      "r30"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Accrued Liabilities, Current",
        "terseLabel": "Accrued expenses",
        "totalLabel": "Total accrued expenses"
       }
      }
     },
     "localname": "AccruedLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccruedProfessionalFeesCurrent": {
     "auth_ref": [
      "r30"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_AccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Accrued Professional Fees, Current",
        "terseLabel": "Accrued professional fees"
       }
      }
     },
     "localname": "AccruedProfessionalFeesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": {
     "auth_ref": [
      "r12",
      "r197"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.",
        "label": "Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment",
        "negatedLabel": "Less: Accumulated depreciation",
        "periodEndLabel": "Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance",
        "periodStartLabel": "Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance",
        "totalLabel": "Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total"
       }
      }
     },
     "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r22",
      "r38",
      "r39",
      "r40",
      "r537",
      "r555",
      "r556"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 3.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.",
        "label": "Accumulated Other Comprehensive Income (Loss), Net of Tax",
        "terseLabel": "Accumulated other comprehensive loss",
        "totalLabel": "Accumulated Other Comprehensive Income (Loss), Net of Tax, Total"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [
      "r37",
      "r40",
      "r50",
      "r51",
      "r52",
      "r98",
      "r99",
      "r100",
      "r430",
      "r475",
      "r551",
      "r552"
     ],
     "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 [Member]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdditionalPaidInCapitalCommonStock": {
     "auth_ref": [
      "r20"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 1.0,
       "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",
        "periodEndLabel": "Additional Paid in Capital, Common Stock, Ending Balance",
        "periodStartLabel": "Additional Paid in Capital, Common Stock, Beginning Balance",
        "terseLabel": "Additional paid-in capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [
      "r98",
      "r99",
      "r100",
      "r383",
      "r384",
      "r385",
      "r437"
     ],
     "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 [Member]"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": {
     "auth_ref": [
      "r340",
      "r388",
      "r389"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.",
        "label": "APIC, Share-based Payment Arrangement, Increase for Cost Recognition",
        "terseLabel": "Stock-based compensation expense",
        "totalLabel": "APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AllocatedShareBasedCompensationExpense": {
     "auth_ref": [
      "r376"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.",
        "label": "Share-based Payment Arrangement, Expense",
        "terseLabel": "Stock-based compensation expense",
        "verboseLabel": "Total stock-based compensation expense"
       }
      }
     },
     "localname": "AllocatedShareBasedCompensationExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfStockbasedCompensationExpenseDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfDebtDiscountPremium": {
     "auth_ref": [
      "r66",
      "r78",
      "r232",
      "r458"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.",
        "label": "Amortization of Debt Discount (Premium)",
        "terseLabel": "Amortization of premium on available for sale securities"
       }
      }
     },
     "localname": "AmortizationOfDebtDiscountPremium",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": {
     "auth_ref": [
      "r118"
     ],
     "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": "Number of anti-dilutive potential common share equivalents outstanding"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentialDilutiveCommonShareEquivalentsDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis": {
     "auth_ref": [
      "r118"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of antidilutive security.",
        "label": "Antidilutive Securities [Axis]",
        "terseLabel": "Antidilutive Securities"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentialDilutiveCommonShareEquivalentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems": {
     "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": "Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]",
        "terseLabel": "Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentialDilutiveCommonShareEquivalentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AntidilutiveSecuritiesNameDomain": {
     "auth_ref": [
      "r118"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Incremental common shares attributable to securities that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.",
        "label": "Antidilutive Securities, Name [Domain]",
        "terseLabel": "Antidilutive Securities, Name"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentialDilutiveCommonShareEquivalentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r14",
      "r91",
      "r136",
      "r145",
      "r150",
      "r178",
      "r219",
      "r220",
      "r221",
      "r222",
      "r223",
      "r224",
      "r225",
      "r226",
      "r227",
      "r228",
      "r229",
      "r425",
      "r431",
      "r443",
      "r479",
      "r481",
      "r522",
      "r536"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Assets [Abstract]",
        "terseLabel": "Assets"
       }
      }
     },
     "localname": "AssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssetsCurrent": {
     "auth_ref": [
      "r5",
      "r27",
      "r91",
      "r178",
      "r219",
      "r220",
      "r221",
      "r222",
      "r223",
      "r224",
      "r225",
      "r226",
      "r227",
      "r228",
      "r229",
      "r425",
      "r431",
      "r443",
      "r479",
      "r481"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 0.0,
       "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax": {
     "auth_ref": [
      "r162"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "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": "Unrealized Gains"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax": {
     "auth_ref": [
      "r163"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "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": "Unrealized Losses"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis": {
     "auth_ref": [
      "r160",
      "r185"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail": {
       "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": "Amortized Cost"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue": {
     "auth_ref": [
      "r164",
      "r165",
      "r533"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value 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 next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One",
        "terseLabel": "Maturing in one year or less"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtSecurities": {
     "auth_ref": [
      "r157",
      "r161",
      "r185",
      "r524"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      },
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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": "Fair Value",
        "totalLabel": "Total investments",
        "verboseLabel": "Marketable securities"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtSecurities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfScheduledMaturityForMarketableSecuritiesDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent": {
     "auth_ref": [
      "r159",
      "r185"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 1.0,
       "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",
        "totalLabel": "Debt Securities, Available-for-sale, Current, Total"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtSecuritiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AwardTypeAxis": {
     "auth_ref": [
      "r343",
      "r344",
      "r345",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r363",
      "r364",
      "r366",
      "r367",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of award under share-based payment arrangement.",
        "label": "Award Type [Axis]"
       }
      }
     },
     "localname": "AwardTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock": {
     "auth_ref": [
      "r2",
      "r97",
      "r130"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).",
        "label": "Business Description and Basis of Presentation [Text Block]",
        "terseLabel": "Description of Business and Basis of Presentation"
       }
      }
     },
     "localname": "BusinessDescriptionAndBasisOfPresentationTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDescriptionOfBusinessAndBasisOfPresentation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r3",
      "r10",
      "r80"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 0.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash and Cash Equivalents, at Carrying Value",
        "periodEndLabel": "Cash and Cash Equivalents, at Carrying Value, Ending Balance",
        "periodStartLabel": "Cash and Cash Equivalents, at Carrying Value, Beginning Balance",
        "terseLabel": "Cash and cash equivalents",
        "totalLabel": "Cash and Cash Equivalents, at Carrying Value, Total"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsFairValueDisclosure": {
     "auth_ref": [],
     "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": "Cash equivalents"
       }
      }
     },
     "localname": "CashAndCashEquivalentsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsPolicyTextBlock": {
     "auth_ref": [
      "r81"
     ],
     "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 and Cash Equivalents"
       }
      }
     },
     "localname": "CashAndCashEquivalentsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations": {
     "auth_ref": [
      "r75",
      "r80",
      "r85"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, 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, Including Disposal Group and Discontinued Operations",
        "periodEndLabel": "Cash and cash equivalents, end of year",
        "periodStartLabel": "Cash and cash equivalents, beginning year",
        "totalLabel": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": {
     "auth_ref": [
      "r75",
      "r448"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "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 (decrease) increase in cash and cash equivalents"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommitmentsAndContingencies": {
     "auth_ref": [
      "r32",
      "r525",
      "r541"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 3.0,
       "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 (Note 9)"
       }
      }
     },
     "localname": "CommitmentsAndContingencies",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Commitments and Contingencies Disclosure [Abstract]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": {
     "auth_ref": [
      "r203",
      "r204",
      "r205",
      "r214",
      "r575"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingencies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommonStockCapitalSharesReservedForFutureIssuance": {
     "auth_ref": [
      "r33"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate number of common shares reserved for future issuance.",
        "label": "Common Stock, Capital Shares Reserved for Future Issuance",
        "terseLabel": "Common stock reserved for issuance upon exercise or settlement of stock options or other awards"
       }
      }
     },
     "localname": "CommonStockCapitalSharesReservedForFutureIssuance",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [
      "r98",
      "r99",
      "r437"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]",
        "terseLabel": "Common Stock [Member]"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r18"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face amount or stated value per share of common stock.",
        "label": "Common Stock, Par or Stated Value Per Share",
        "terseLabel": "Common stock, par value",
        "verboseLabel": "Common stock, per share"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r18"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.",
        "label": "Common Stock, Shares Authorized",
        "terseLabel": "Common stock, shares authorized"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r18"
     ],
     "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",
        "terseLabel": "Common stock, shares issued",
        "totalLabel": "Common Stock, Shares, Issued, Total"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesOutstanding": {
     "auth_ref": [
      "r18",
      "r250"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.",
        "label": "Common Stock, Shares, Outstanding",
        "periodEndLabel": "Common Stock, Shares, Outstanding, Ending Balance",
        "periodStartLabel": "Common Stock, Shares, Outstanding, Beginning Balance",
        "terseLabel": "Common stock, shares outstanding"
       }
      }
     },
     "localname": "CommonStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r18",
      "r481"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 0.0,
       "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",
        "periodEndLabel": "Common Stock, Value, Issued, Ending Balance",
        "periodStartLabel": "Common Stock, Value, Issued, Beginning Balance",
        "terseLabel": "Common stock, $0.001 par value, 100,000,000 authorized Shares issued and outstanding: 24,550,748 and 24,422,531 at April 30, 2022 and 2021, respectively",
        "totalLabel": "Common Stock, Value, Issued, Total"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CompensationAndRetirementDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Retirement Benefits [Abstract]"
       }
      }
     },
     "localname": "CompensationAndRetirementDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTax": {
     "auth_ref": [
      "r45",
      "r47",
      "r48",
      "r58",
      "r529",
      "r544"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "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"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComputerEquipmentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Long lived, depreciable assets that are used in the creation, maintenance and utilization of information systems.",
        "label": "Computer Equipment [Member]"
       }
      }
     },
     "localname": "ComputerEquipmentMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConsolidationPolicyTextBlock": {
     "auth_ref": [
      "r87",
      "r427"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.",
        "label": "Consolidation, Policy [Policy Text Block]",
        "terseLabel": "Principles of Consolidation"
       }
      }
     },
     "localname": "ConsolidationPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock": {
     "auth_ref": [
      "r253"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.",
        "label": "Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]",
        "terseLabel": "Contract balances"
       }
      }
     },
     "localname": "ContractWithCustomerAssetAndLiabilityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CorporateBondSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This category includes information about long-term debt securities that are issued by either a domestic or foreign corporate business entity with a date certain promise of repayment and a return to the holder for the time value of money (for example, variable or fixed interest, original issue discount).",
        "label": "Corporate Bond Securities [Member]"
       }
      }
     },
     "localname": "CorporateBondSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CorporateDebtSecuritiesMember": {
     "auth_ref": [
      "r279",
      "r324",
      "r557"
     ],
     "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 [Member]"
       }
      }
     },
     "localname": "CorporateDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger": {
     "auth_ref": [
      "r171",
      "r189",
      "r192"
     ],
     "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), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer",
        "terseLabel": "Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer",
        "verboseLabel": "Debt Securities, Greater than 12 Months, Fair Value"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss": {
     "auth_ref": [
      "r171",
      "r189"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss",
        "negatedLabel": "Debt Securities, Greater than 12 Months, Unrealized Loss"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months": {
     "auth_ref": [
      "r171",
      "r189",
      "r192"
     ],
     "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), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months",
        "terseLabel": "Debt Securities, Less than 12 Months, Fair Value"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss": {
     "auth_ref": [
      "r171",
      "r189"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss",
        "negatedLabel": "Debt Securities, Less than 12 Months, Unrealized Loss"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss": {
     "auth_ref": [
      "r172"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of realized gain (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 Gain (Loss)",
        "terseLabel": "Realized (loss) gains from sale of available for sale securities",
        "totalLabel": "Debt Securities, Available-for-Sale, Realized Gain (Loss), Total"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleRealizedGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition": {
     "auth_ref": [
      "r169",
      "r186",
      "r192"
     ],
     "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), in unrealized loss position without allowance for credit loss.",
        "label": "Debt Securities, Available-for-Sale, Unrealized Loss Position",
        "terseLabel": "Debt Securities, Fair Value",
        "totalLabel": "Debt Securities, Fair Value"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPosition",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss": {
     "auth_ref": [
      "r170",
      "r187"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss",
        "negatedLabel": "Debt Securities, Unrealized Loss",
        "negatedTotalLabel": "Debt Securities, Unrealized Loss",
        "totalLabel": "Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss, Total"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock": {
     "auth_ref": [
      "r168",
      "r188",
      "r192"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]",
        "terseLabel": "Summary of Company's Investments with Unrealized Losses, Aggregated by Investment Type"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]"
       }
      }
     },
     "localname": "DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs.",
        "label": "Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]",
        "terseLabel": "Schedule of Prepaid Expenses and Other Current Assets"
       }
      }
     },
     "localname": "DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DeferredTaxAssetsGross": {
     "auth_ref": [
      "r403"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_DeferredTaxAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.",
        "label": "Deferred Tax Assets, Gross",
        "totalLabel": "Subtotal"
       }
      }
     },
     "localname": "DeferredTaxAssetsGross",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsLiabilitiesNet": {
     "auth_ref": [
      "r405"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.",
        "label": "Deferred Tax Assets, Net",
        "totalLabel": "Net deferred tax asset"
       }
      }
     },
     "localname": "DeferredTaxAssetsLiabilitiesNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsNet": {
     "auth_ref": [
      "r405"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_DeferredTaxAssetsLiabilitiesNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.",
        "label": "Deferred Tax Assets, Net of Valuation Allowance",
        "totalLabel": "Deferred tax assets, net of valuation allowance"
       }
      }
     },
     "localname": "DeferredTaxAssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsNetOfValuationAllowanceAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Deferred Tax Assets, Net of Valuation Allowance [Abstract]",
        "terseLabel": "Deferred tax assets:"
       }
      }
     },
     "localname": "DeferredTaxAssetsNetOfValuationAllowanceAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DeferredTaxAssetsOperatingLossCarryforwards": {
     "auth_ref": [
      "r410",
      "r411"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.",
        "label": "Deferred Tax Assets, Operating Loss Carryforwards",
        "terseLabel": "Net operating loss (\"NOL\") carryforwards",
        "totalLabel": "Deferred Tax Assets, Operating Loss Carryforwards, Total"
       }
      }
     },
     "localname": "DeferredTaxAssetsOperatingLossCarryforwards",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsOther": {
     "auth_ref": [
      "r410",
      "r411"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.",
        "label": "Deferred Tax Assets, Other",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "DeferredTaxAssetsOther",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsValuationAllowance": {
     "auth_ref": [
      "r404"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredTaxAssetsNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.",
        "label": "Deferred Tax Assets, Valuation Allowance",
        "negatedLabel": "Less: valuation allowance",
        "terseLabel": "Valuation allowance"
       }
      }
     },
     "localname": "DeferredTaxAssetsValuationAllowance",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Deferred Tax Liabilities, Net [Abstract]",
        "terseLabel": "Deferred tax liabilities:"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesOther": {
     "auth_ref": [
      "r410",
      "r411"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredTaxAssetsLiabilitiesNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences classified as other.",
        "label": "Deferred Tax Liabilities, Other",
        "negatedLabel": "Other",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesOther",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxEffectOfSignificantTemporaryDifferencesRepresentingDeferredTaxAssetsAndLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedContributionPlanDisclosureLineItems": {
     "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": "Defined Contribution Plan Disclosure [Line Items]"
       }
      }
     },
     "localname": "DefinedContributionPlanDisclosureLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of discretionary contributions made by an employer to a defined contribution plan.",
        "label": "Defined Contribution Plan, Employer Discretionary Contribution Amount",
        "terseLabel": "Total employer contributions"
       }
      }
     },
     "localname": "DefinedContributionPlanEmployerDiscretionaryContributionAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage employer matches of the employee's percentage contribution matched.",
        "label": "Defined Contribution Plan, Employer Matching Contribution, Percent of Match",
        "terseLabel": "Percentage of employee contributions matched to the plan"
       }
      }
     },
     "localname": "DefinedContributionPlanEmployerMatchingContributionPercentOfMatch",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedContributionPlanTable": {
     "auth_ref": [
      "r327"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans.",
        "label": "Defined Contribution Plan [Table]"
       }
      }
     },
     "localname": "DefinedContributionPlanTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DepreciationDepletionAndAmortization": {
     "auth_ref": [
      "r78",
      "r134"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 1.0,
       "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",
        "totalLabel": "Depreciation, Depletion and Amortization, Total",
        "verboseLabel": "Depreciation expense"
       }
      }
     },
     "localname": "DepreciationDepletionAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock": {
     "auth_ref": [
      "r342",
      "r343",
      "r377",
      "r378",
      "r380",
      "r390"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for share-based payment arrangement.",
        "label": "Share-based Payment Arrangement [Text Block]",
        "terseLabel": "Stock-Based Compensation"
       }
      }
     },
     "localname": "DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Share-based Payment Arrangement [Abstract]"
       }
      }
     },
     "localname": "DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DomesticCountryMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Designated tax department of the government that is entitled to levy and collect income taxes from the entity in its country of domicile.",
        "label": "Domestic Tax Authority [Member]",
        "terseLabel": "U.S. Federal Income Tax [Member]"
       }
      }
     },
     "localname": "DomesticCountryMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EarliestTaxYearMember": {
     "auth_ref": [
      "r399"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Earliest identified tax year.",
        "label": "Earliest Tax Year [Member]"
       }
      }
     },
     "localname": "EarliestTaxYearMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EarningsPerShareBasic": {
     "auth_ref": [
      "r59",
      "r103",
      "r104",
      "r105",
      "r106",
      "r107",
      "r111",
      "r113",
      "r115",
      "r116",
      "r117",
      "r120",
      "r121",
      "r438",
      "r439",
      "r530",
      "r545"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.",
        "label": "Earnings Per Share, Basic",
        "terseLabel": "Net loss per share, basic",
        "totalLabel": "Earnings Per Share, Basic, Total"
       }
      }
     },
     "localname": "EarningsPerShareBasic",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareDiluted": {
     "auth_ref": [
      "r59",
      "r103",
      "r104",
      "r105",
      "r106",
      "r107",
      "r113",
      "r115",
      "r116",
      "r117",
      "r120",
      "r121",
      "r438",
      "r439",
      "r530",
      "r545"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.",
        "label": "Earnings Per Share, Diluted",
        "terseLabel": "Net loss per share, diluted",
        "totalLabel": "Earnings Per Share, Diluted, Total"
       }
      }
     },
     "localname": "EarningsPerShareDiluted",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerSharePolicyTextBlock": {
     "auth_ref": [
      "r118",
      "r119"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.",
        "label": "Earnings Per Share, Policy [Policy Text Block]",
        "terseLabel": "Net Loss per Share"
       }
      }
     },
     "localname": "EarningsPerSharePolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations": {
     "auth_ref": [
      "r448"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 3.0,
       "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; including, but not limited to, 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, Including Disposal Group and Discontinued Operations",
        "terseLabel": "Effect of exchange rate changes on cash and cash equivalents",
        "totalLabel": "Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total"
       }
      }
     },
     "localname": "EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateContinuingOperations": {
     "auth_ref": [
      "r396"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Effective Income Tax Rate Reconciliation, Percent",
        "totalLabel": "Effective income tax rate"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateContinuingOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective Income Tax Rate Reconciliation, Percent [Abstract]"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": {
     "auth_ref": [
      "r94",
      "r396",
      "r418"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of domestic federal statutory tax rate applicable to pretax income (loss).",
        "label": "Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent",
        "terseLabel": "Income tax benefit at U.S. federal statutory rate"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance": {
     "auth_ref": [
      "r396",
      "r418"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail": {
       "order": 5.0,
       "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.",
        "label": "Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent",
        "terseLabel": "Valuation allowance"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential": {
     "auth_ref": [
      "r396",
      "r418"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.",
        "label": "Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent",
        "terseLabel": "Foreign rate differential"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense": {
     "auth_ref": [
      "r396",
      "r418"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.",
        "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent",
        "terseLabel": "Nondeductible expenses - UK R&amp;D credit",
        "totalLabel": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent, Total"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationNondeductibleExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments": {
     "auth_ref": [
      "r396",
      "r418"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.",
        "label": "Effective Income Tax Rate Reconciliation, Other Adjustments, Percent",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationOtherAdjustments",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationBetweenEffectiveTaxRatesAndStatutoryRatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EmployeeRelatedLiabilitiesCurrent": {
     "auth_ref": [
      "r30"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_AccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Employee-related Liabilities, Current",
        "terseLabel": "Accrued compensation",
        "totalLabel": "Employee-related Liabilities, Current, Total"
       }
      }
     },
     "localname": "EmployeeRelatedLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail"
     ],
     "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 Payment Arrangement, Expensed and Capitalized, Amount [Line Items]"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfStockbasedCompensationExpenseDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1": {
     "auth_ref": [
      "r379"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition",
        "terseLabel": "Unrecognized compensation expense related to unvested awards expected to be recognized over a weighted-average period"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions": {
     "auth_ref": [
      "r379"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost to be recognized for option under share-based payment arrangement.",
        "label": "Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount",
        "terseLabel": "Unrecognized compensation expense related to unvested awards"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmployeeStockOptionMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share-based payment arrangement granting right, subject to vesting and other restrictions, to purchase or sell certain number of shares at predetermined price for specified period of time.",
        "label": "Share-Based Payment Arrangement, Option [Member]",
        "terseLabel": "Stock Options [Member]"
       }
      }
     },
     "localname": "EmployeeStockOptionMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquipmentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tangible personal property used to produce goods and services.",
        "label": "Equipment [Member]",
        "terseLabel": "Laboratory Equipment [Member]"
       }
      }
     },
     "localname": "EquipmentMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r0",
      "r50",
      "r51",
      "r52",
      "r98",
      "r99",
      "r100",
      "r102",
      "r108",
      "r110",
      "r122",
      "r179",
      "r250",
      "r251",
      "r383",
      "r384",
      "r385",
      "r413",
      "r414",
      "r437",
      "r449",
      "r450",
      "r451",
      "r452",
      "r453",
      "r455",
      "r475",
      "r551",
      "r552",
      "r553"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": {
     "auth_ref": [
      "r440",
      "r441",
      "r442"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.",
        "label": "Fair Value, Recurring and Nonrecurring [Table]",
        "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r231",
      "r234",
      "r235",
      "r279",
      "r281",
      "r282",
      "r283",
      "r284",
      "r285",
      "r286",
      "r324",
      "r441",
      "r488",
      "r489",
      "r490"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fair Value Disclosures [Abstract]"
       }
      }
     },
     "localname": "FairValueDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r231",
      "r279",
      "r281",
      "r286",
      "r324",
      "r441",
      "r488"
     ],
     "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 [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r231",
      "r234",
      "r235",
      "r279",
      "r281",
      "r286",
      "r324",
      "r441",
      "r489"
     ],
     "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 [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r231",
      "r234",
      "r235",
      "r279",
      "r281",
      "r282",
      "r283",
      "r284",
      "r285",
      "r286",
      "r324",
      "r441",
      "r490"
     ],
     "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 [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "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 Measurement"
       }
      }
     },
     "localname": "FairValueMeasurementPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [
      "r231",
      "r234",
      "r235",
      "r279",
      "r281",
      "r282",
      "r283",
      "r284",
      "r285",
      "r286",
      "r324",
      "r488",
      "r489",
      "r490"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancialInstrumentAxis": {
     "auth_ref": [
      "r166",
      "r167",
      "r175",
      "r176",
      "r177",
      "r180",
      "r181",
      "r182",
      "r183",
      "r184",
      "r188",
      "r190",
      "r191",
      "r192",
      "r233",
      "r248",
      "r435",
      "r485",
      "r486",
      "r487",
      "r488",
      "r489",
      "r490",
      "r491",
      "r492",
      "r493",
      "r494",
      "r495",
      "r496",
      "r497",
      "r498",
      "r499",
      "r500",
      "r501",
      "r502",
      "r503",
      "r504",
      "r505",
      "r506",
      "r507",
      "r508",
      "r509",
      "r510",
      "r511",
      "r512",
      "r513",
      "r514",
      "r599",
      "r600",
      "r601",
      "r602",
      "r603",
      "r604",
      "r605"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ForeignCountryMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Designated tax departments of governments entitled to levy and collect income taxes from the entity outside the entity's country of domicile.",
        "label": "Foreign Tax Authority [Member]",
        "terseLabel": "U.K. Income Tax [Member]"
       }
      }
     },
     "localname": "ForeignCountryMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignCurrencyTransactionGainLossBeforeTax": {
     "auth_ref": [
      "r444",
      "r445",
      "r446",
      "r447"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 1.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.",
        "label": "Foreign Currency Transaction Gain (Loss), before Tax",
        "terseLabel": "Foreign currency exchange gain (loss)",
        "totalLabel": "Foreign Currency Transaction Gain (Loss), before Tax, Total"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionGainLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ForeignCurrencyTransactionGainLossRealized": {
     "auth_ref": [
      "r446",
      "r447"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.",
        "label": "Foreign Currency Transaction Gain (Loss), Realized",
        "negatedLabel": "Foreign currency exchange loss (gain)"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionGainLossRealized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock": {
     "auth_ref": [
      "r457"
     ],
     "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"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FurnitureAndFixturesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.",
        "label": "Furniture and Fixtures [Member]"
       }
      }
     },
     "localname": "FurnitureAndFixturesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GeneralAndAdministrativeExpense": {
     "auth_ref": [
      "r63"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 1.0,
       "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",
        "totalLabel": "General and Administrative Expense, Total"
       }
      }
     },
     "localname": "GeneralAndAdministrativeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GeneralAndAdministrativeExpenseMember": {
     "auth_ref": [
      "r60"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Primary financial statement caption encompassing general and administrative expense.",
        "label": "General and Administrative Expense [Member]",
        "terseLabel": "General and Administrative [Member]"
       }
      }
     },
     "localname": "GeneralAndAdministrativeExpenseMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfStockbasedCompensationExpenseDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic": {
     "auth_ref": [
      "r93",
      "r417"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfTheCompanysLossBeforeIncomeTaxesDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.",
        "label": "Income (Loss) from Continuing Operations before Income Taxes, Domestic",
        "terseLabel": "Domestic"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfTheCompanysLossBeforeIncomeTaxesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": {
     "auth_ref": [
      "r55",
      "r136",
      "r144",
      "r146",
      "r149",
      "r151",
      "r520",
      "r526",
      "r531",
      "r546"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfTheCompanysLossBeforeIncomeTaxesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 0.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.",
        "label": "Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest",
        "terseLabel": "Loss before income taxes",
        "totalLabel": "Income before income taxes"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfTheCompanysLossBeforeIncomeTaxesDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign": {
     "auth_ref": [
      "r93",
      "r417"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfTheCompanysLossBeforeIncomeTaxesDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.",
        "label": "Income (Loss) from Continuing Operations before Income Taxes, Foreign",
        "terseLabel": "Foreign"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfTheCompanysLossBeforeIncomeTaxesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationAxis": {
     "auth_ref": [
      "r199",
      "r202"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfStockbasedCompensationExpenseDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationDomain": {
     "auth_ref": [
      "r202"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfStockbasedCompensationExpenseDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxAuthorityAxis": {
     "auth_ref": [
      "r399"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by tax jurisdiction.",
        "label": "Income Tax Authority [Axis]"
       }
      }
     },
     "localname": "IncomeTaxAuthorityAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxAuthorityDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Agency, division or body classification that levies income taxes, examines tax returns for compliance, or grants exemptions from or makes other decisions pertaining to income taxes.",
        "label": "Income Tax Authority [Domain]"
       }
      }
     },
     "localname": "IncomeTaxAuthorityDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income Tax Disclosure [Abstract]"
       }
      }
     },
     "localname": "IncomeTaxDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxDisclosureTextBlock": {
     "auth_ref": [
      "r94",
      "r397",
      "r401",
      "r407",
      "r415",
      "r419",
      "r421",
      "r422",
      "r423"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxes"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r95",
      "r109",
      "r110",
      "r135",
      "r395",
      "r416",
      "r420",
      "r547"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Income Tax Expense (Benefit)",
        "terseLabel": "Income tax expense (benefit)",
        "totalLabel": "Income Tax Expense (Benefit), Total",
        "verboseLabel": "Income tax (benefit) expense"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxPolicyTextBlock": {
     "auth_ref": [
      "r49",
      "r393",
      "r394",
      "r401",
      "r402",
      "r406",
      "r412"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.",
        "label": "Income Tax, Policy [Policy Text Block]",
        "terseLabel": "Income Taxes"
       }
      }
     },
     "localname": "IncomeTaxPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsPayable": {
     "auth_ref": [
      "r77"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.",
        "label": "Increase (Decrease) in Accounts Payable",
        "terseLabel": "Accounts payable",
        "totalLabel": "Increase (Decrease) in Accounts Payable, Total"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsPayable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccruedLiabilities": {
     "auth_ref": [
      "r77"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid.",
        "label": "Increase (Decrease) in Accrued Liabilities",
        "terseLabel": "Accrued expenses",
        "totalLabel": "Increase (Decrease) in Accrued Liabilities, Total"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccruedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInContractWithCustomerLiability": {
     "auth_ref": [
      "r77",
      "r516"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 11.0,
       "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 revenue"
       }
      }
     },
     "localname": "IncreaseDecreaseInContractWithCustomerLiability",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Increase (Decrease) in Operating Capital [Abstract]",
        "terseLabel": "Changes in operating assets and liabilities:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingCapitalAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets": {
     "auth_ref": [
      "r77"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 8.0,
       "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",
        "totalLabel": "Increase (Decrease) in Prepaid Expense and Other Assets, Total"
       }
      }
     },
     "localname": "IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IndemnificationGuaranteeMember": {
     "auth_ref": [
      "r215",
      "r218"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "An agreement (contract) that contingently requires the guarantor to make payments to the guaranteed party in compensation for that party's or parties' loss or injury attributable to specified events or actions, such as a patent infringement action against an entity that relied on certain representations as to ownership rights made by a software vendor.",
        "label": "Indemnification Agreement [Member]",
        "terseLabel": "Indemnification Guarantee [Member]"
       }
      }
     },
     "localname": "IndemnificationGuaranteeMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestReceivableAndOtherAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of interest receivable and assets classified as other.",
        "label": "Interest Receivable and Other Assets",
        "terseLabel": "Interest and other receivables"
       }
      }
     },
     "localname": "InterestReceivableAndOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentIncomeInterest": {
     "auth_ref": [
      "r64",
      "r133"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 0.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.",
        "label": "Investment Income, Interest",
        "terseLabel": "Interest income"
       }
      }
     },
     "localname": "InvestmentIncomeInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentTypeAxis": {
     "auth_ref": [
      "r558",
      "r559",
      "r560",
      "r561",
      "r562",
      "r563",
      "r564",
      "r565",
      "r566",
      "r567",
      "r568",
      "r569",
      "r570",
      "r571",
      "r572"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of investments.",
        "label": "Investment Type [Axis]"
       }
      }
     },
     "localname": "InvestmentTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentTypeCategorizationMember": {
     "auth_ref": [
      "r558",
      "r559",
      "r560",
      "r561",
      "r562",
      "r563",
      "r564",
      "r565",
      "r566",
      "r567",
      "r568",
      "r569",
      "r570",
      "r571",
      "r572"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Asset obtained to generate income or appreciate in value.",
        "label": "Investments [Domain]"
       }
      }
     },
     "localname": "InvestmentTypeCategorizationMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "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": "Summary of Scheduled Maturity for Marketable Securities"
       }
      }
     },
     "localname": "InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investments, Debt and Equity Securities [Abstract]"
       }
      }
     },
     "localname": "InvestmentsDebtAndEquitySecuritiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": {
     "auth_ref": [
      "r174",
      "r521",
      "r534",
      "r573",
      "r606"
     ],
     "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": "Marketable Securities"
       }
      }
     },
     "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecurities"
     ],
     "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": "Lease agreement square feet"
       }
      }
     },
     "localname": "LandSubjectToGroundLeases",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "areaItemType"
    },
    "us-gaap_LeaseCost": {
     "auth_ref": [
      "r472",
      "r474"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lease cost recognized by lessee for lease contract.",
        "label": "Lease, Cost",
        "totalLabel": "Total lease costs"
       }
      }
     },
     "localname": "LeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LeaseCostAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lease, Cost [Abstract]"
       }
      }
     },
     "localname": "LeaseCostAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_LeaseCostTableTextBlock": {
     "auth_ref": [
      "r472"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.",
        "label": "Lease, Cost [Table Text Block]",
        "terseLabel": "Summary of Lease Costs"
       }
      }
     },
     "localname": "LeaseCostTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LeaseExpirationDate1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Date which lease or group of leases is set to expire, in YYYY-MM-DD format.",
        "label": "Lease Expiration Date",
        "terseLabel": "Lease expiration term"
       }
      }
     },
     "localname": "LeaseExpirationDate1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail"
     ],
     "xbrltype": "dateItemType"
    },
    "us-gaap_LeaseholdImprovementsMember": {
     "auth_ref": [
      "r196"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Additions or improvements to assets held under a lease arrangement.",
        "label": "Leasehold Improvements [Member]"
       }
      }
     },
     "localname": "LeaseholdImprovementsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LeasesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Leases [Abstract]"
       }
      }
     },
     "localname": "LeasesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeLeaseDescriptionLineItems": {
     "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": "Lessee, Lease, Description [Line Items]",
        "terseLabel": "Lessee Lease Description [Line Items]"
       }
      }
     },
     "localname": "LesseeLeaseDescriptionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeLeaseDescriptionTable": {
     "auth_ref": [
      "r464"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about lessee's leases.",
        "label": "Lessee, Lease, Description [Table]",
        "terseLabel": "Lessee Lease Description [Table]"
       }
      }
     },
     "localname": "LesseeLeaseDescriptionTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": {
     "auth_ref": [
      "r473"
     ],
     "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 Maturity of Undiscounted Payments and Future Minimum Payments Due Under Lease Liabilities and Present Value of Liabilities"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail2": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease.",
        "label": "Lessee, Operating Lease, Liability, to be Paid",
        "totalLabel": "Total lease payments"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail": {
       "order": 5.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, after Year Five",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year One",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail": {
       "order": 4.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Five",
        "terseLabel": "2027"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Four",
        "terseLabel": "2026"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Three",
        "terseLabel": "2025"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Two",
        "terseLabel": "2024"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail2": {
       "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",
        "terseLabel": "Less: imputed interest"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseOptionToExtend": {
     "auth_ref": [
      "r463"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.",
        "label": "Lessee, Operating Lease, Option to Extend",
        "terseLabel": "Lease description option to extend"
       }
      }
     },
     "localname": "LesseeOperatingLeaseOptionToExtend",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeOperatingLeaseTermOfContract": {
     "auth_ref": [
      "r463"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Lessee, Operating Lease, Term of Contract",
        "terseLabel": "Lessee, lease term"
       }
      }
     },
     "localname": "LesseeOperatingLeaseTermOfContract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r25",
      "r91",
      "r178",
      "r443",
      "r481",
      "r523",
      "r539"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "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\u2019 equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Liabilities and Equity [Abstract]",
        "terseLabel": "Liabilities and stockholders\u2019 equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesCurrent": {
     "auth_ref": [
      "r6",
      "r31",
      "r91",
      "r178",
      "r219",
      "r220",
      "r221",
      "r223",
      "r224",
      "r225",
      "r226",
      "r227",
      "r228",
      "r229",
      "r426",
      "r431",
      "r432",
      "r443",
      "r479",
      "r480",
      "r481"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesNoncurrent": {
     "auth_ref": [
      "r7",
      "r8",
      "r9",
      "r15",
      "r16",
      "r91",
      "r178",
      "r219",
      "r220",
      "r221",
      "r223",
      "r224",
      "r225",
      "r226",
      "r227",
      "r228",
      "r229",
      "r426",
      "r431",
      "r432",
      "r443",
      "r479",
      "r480"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of obligation due after one year or beyond the normal operating cycle, if longer.",
        "label": "Liabilities, Noncurrent",
        "totalLabel": "Total long-term liabilities"
       }
      }
     },
     "localname": "LiabilitiesNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesNoncurrentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Liabilities, Noncurrent [Abstract]",
        "terseLabel": "Long-term liabilities:"
       }
      }
     },
     "localname": "LiabilitiesNoncurrentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LossContingenciesByNatureOfContingencyAxis": {
     "auth_ref": [
      "r206",
      "r208",
      "r209",
      "r210",
      "r211",
      "r216",
      "r217"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of existing condition, situation, or set of circumstances involving uncertainty as to possible loss to an enterprise that will ultimately be resolved when one or more future events occur or fail to occur.",
        "label": "Loss Contingency Nature [Axis]",
        "terseLabel": "Loss Contingency Nature"
       }
      }
     },
     "localname": "LossContingenciesByNatureOfContingencyAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LossContingencyAccrualAtCarryingValue": {
     "auth_ref": [
      "r206",
      "r207"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of loss contingency liability.",
        "label": "Loss Contingency Accrual",
        "periodEndLabel": "Loss Contingency Accrual, Ending Balance",
        "periodStartLabel": "Loss Contingency Accrual, Beginning Balance",
        "terseLabel": "Contingent liabilities"
       }
      }
     },
     "localname": "LossContingencyAccrualAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LossContingencyNatureDomain": {
     "auth_ref": [
      "r206",
      "r208",
      "r209",
      "r210",
      "r211",
      "r216",
      "r217"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "An existing condition, situation, or set of circumstances involving uncertainty as to possible loss to an enterprise that will ultimately be resolved when one or more future events occur or fail to occur. Resolution of the uncertainty may confirm the incurrence of a loss or impairment of an asset or the incurrence of a liability.",
        "label": "Loss Contingency, Nature [Domain]",
        "terseLabel": "Loss Contingency, Nature"
       }
      }
     },
     "localname": "LossContingencyNatureDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MachineryAndEquipmentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.",
        "label": "Machinery and Equipment [Member]"
       }
      }
     },
     "localname": "MachineryAndEquipmentMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MarketableSecuritiesLineItems": {
     "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": "Marketable Securities [Line Items]",
        "terseLabel": "Marketable Securities [Line Items]"
       }
      }
     },
     "localname": "MarketableSecuritiesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_MarketableSecuritiesRealizedGainLoss": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of realized gain (loss) on investment in marketable security, including other-than-temporary impairment (OTTI).",
        "label": "Marketable Securities, Realized Gain (Loss)",
        "negatedLabel": "Realized loss (gain) from sale of marketable securities",
        "totalLabel": "Marketable Securities, Realized Gain (Loss), Total"
       }
      }
     },
     "localname": "MarketableSecuritiesRealizedGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MarketableSecuritiesTable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about investment in marketable security.",
        "label": "Marketable Securities [Table]",
        "terseLabel": "Marketable Securities [Table]"
       }
      }
     },
     "localname": "MarketableSecuritiesTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r75"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.",
        "label": "Net Cash Provided by (Used in) Financing Activities",
        "totalLabel": "Net cash provided by financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]",
        "terseLabel": "Cash flows from financing activities:"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r75"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 1.0,
       "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Investing Activities [Abstract]",
        "terseLabel": "Cash flows from investing activities:"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r75",
      "r76",
      "r79"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 0.0,
       "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Operating Activities [Abstract]",
        "terseLabel": "Cash flows from operating activities:"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r1",
      "r43",
      "r46",
      "r52",
      "r56",
      "r79",
      "r91",
      "r101",
      "r103",
      "r104",
      "r105",
      "r106",
      "r109",
      "r110",
      "r114",
      "r136",
      "r144",
      "r146",
      "r149",
      "r151",
      "r178",
      "r219",
      "r220",
      "r221",
      "r223",
      "r224",
      "r225",
      "r226",
      "r227",
      "r228",
      "r229",
      "r439",
      "r443",
      "r527",
      "r542"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 0.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.",
        "label": "Net Income (Loss) Attributable to Parent",
        "terseLabel": "Net loss",
        "totalLabel": "Net loss"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NoncashInvestingAndFinancingItemsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Noncash Investing and Financing Items [Abstract]",
        "terseLabel": "Supplemental disclosures of cash flow information:"
       }
      }
     },
     "localname": "NoncashInvestingAndFinancingItemsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1": {
     "auth_ref": [
      "r82",
      "r83",
      "r84"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. \"Part noncash\" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.",
        "label": "Noncash or Part Noncash Acquisition, Fixed Assets Acquired",
        "verboseLabel": "Property and equipment included in accounts payable and accrued expenses:"
       }
      }
     },
     "localname": "NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NonoperatingIncomeExpense": {
     "auth_ref": [
      "r65"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).",
        "label": "Nonoperating Income (Expense)",
        "totalLabel": "Total other income"
       }
      }
     },
     "localname": "NonoperatingIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NonoperatingIncomeExpenseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Nonoperating Income (Expense) [Abstract]",
        "terseLabel": "Other income:"
       }
      }
     },
     "localname": "NonoperatingIncomeExpenseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OfficeEquipmentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tangible personal property used in an office setting. Examples include, but are not limited to, computers, copiers and fax machine.",
        "label": "Office Equipment [Member]"
       }
      }
     },
     "localname": "OfficeEquipmentMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OperatingExpenses": {
     "auth_ref": [],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 0.0,
       "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OperatingIncomeLoss": {
     "auth_ref": [
      "r136",
      "r144",
      "r146",
      "r149",
      "r151"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "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": "Operating loss"
       }
      }
     },
     "localname": "OperatingIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseCost": {
     "auth_ref": [
      "r465",
      "r474"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.",
        "label": "Operating Lease, Cost",
        "terseLabel": "Operating lease costs"
       }
      }
     },
     "localname": "OperatingLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseExpense": {
     "auth_ref": [
      "r461"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of operating lease expense. Excludes sublease income.",
        "label": "Operating Lease, Expense",
        "terseLabel": "Rent expense"
       }
      }
     },
     "localname": "OperatingLeaseExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lessee, Operating Lease, Liability, Payment, Due [Abstract]"
       }
      }
     },
     "localname": "OperatingLeaseLiabilitiesPaymentsDueAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OperatingLeaseLiability": {
     "auth_ref": [
      "r460"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail2": {
       "order": 0.0,
       "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",
        "totalLabel": "Total lease liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilityCurrent": {
     "auth_ref": [
      "r460"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail2": {
       "order": 0.0,
       "parentTag": "us-gaap_OperatingLeaseLiability",
       "weight": 1.0
      },
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "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": "Lease liability - current portion",
        "verboseLabel": "Current lease liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiabilityCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilityNoncurrent": {
     "auth_ref": [
      "r460"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail2": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingLeaseLiability",
       "weight": 1.0
      },
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 0.0,
       "parentTag": "us-gaap_LiabilitiesNoncurrent",
       "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": "Lease liability - net of current portion",
        "totalLabel": "Operating Lease, Liability, Noncurrent, Total",
        "verboseLabel": "Long-term lease liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiabilityNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureLeasesSummaryOfMaturityOfUndiscountedPaymentsDueUnderLeaseLiabilitiesAndPresentValueOfLiabilitiesDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeasePayments": {
     "auth_ref": [
      "r462",
      "r468"
     ],
     "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 amounts included in the measurement of operating lease liabilities",
        "verboseLabel": "Monthly lease payments"
       }
      }
     },
     "localname": "OperatingLeasePayments",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfCashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseRightOfUseAsset": {
     "auth_ref": [
      "r459"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 2.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's right to use underlying asset under operating lease.",
        "label": "Operating Lease, Right-of-Use Asset",
        "terseLabel": "Right of use assets"
       }
      }
     },
     "localname": "OperatingLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": {
     "auth_ref": [
      "r471",
      "r474"
     ],
     "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": "Weighted-average discount rate"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageDiscountRatePercent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseTermAndDiscountRateDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": {
     "auth_ref": [
      "r470",
      "r474"
     ],
     "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": "Weighted-average remaining lease term (years)"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseTermAndDiscountRateDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_OperatingLossCarryforwards": {
     "auth_ref": [
      "r408"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.",
        "label": "Operating Loss Carryforwards",
        "terseLabel": "NOL carryforwards"
       }
      }
     },
     "localname": "OperatingLossCarryforwards",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLossCarryforwardsLineItems": {
     "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": "Operating Loss Carryforwards [Line Items]"
       }
      }
     },
     "localname": "OperatingLossCarryforwardsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OperatingLossCarryforwardsTable": {
     "auth_ref": [
      "r409"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule reflecting pertinent information, such as tax authority, amounts, and expiration dates, of net operating loss carryforwards, including an assessment of the likelihood of utilization.",
        "label": "Operating Loss Carryforwards [Table]"
       }
      }
     },
     "localname": "OperatingLossCarryforwardsTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Organization, Consolidation and Presentation of Financial Statements [Abstract]"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherAccruedLiabilitiesCurrent": {
     "auth_ref": [
      "r30"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_AccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.",
        "label": "Other Accrued Liabilities, Current",
        "terseLabel": "Other accrued expenses"
       }
      }
     },
     "localname": "OtherAccruedLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesScheduleOfAccruedExpensesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherAssetsNoncurrent": {
     "auth_ref": [
      "r13"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 3.0,
       "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 assets",
        "totalLabel": "Other Assets, Noncurrent, Total"
       }
      }
     },
     "localname": "OtherAssetsNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherCommitmentsLineItems": {
     "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": "Other Commitments [Line Items]",
        "terseLabel": "Other Commitments [Line Items]"
       }
      }
     },
     "localname": "OtherCommitmentsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherCommitmentsTable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about obligations resulting from other commitments.",
        "label": "Other Commitments [Table]",
        "terseLabel": "Other Commitments [Table]"
       }
      }
     },
     "localname": "OtherCommitmentsTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax": {
     "auth_ref": [
      "r35"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 0.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax",
       "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 adjustments",
        "totalLabel": "Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total",
        "verboseLabel": "Foreign currency translation (loss) gain"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r44",
      "r47",
      "r50",
      "r51",
      "r53",
      "r57",
      "r250",
      "r449",
      "r454",
      "r455",
      "r528",
      "r543"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).",
        "label": "Other Comprehensive Income (Loss), Net of Tax",
        "totalLabel": "Total other comprehensive (loss) income:"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Comprehensive Income (Loss), Net of Tax [Abstract]",
        "terseLabel": "Other comprehensive income (loss):"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax": {
     "auth_ref": [
      "r38",
      "r41",
      "r42",
      "r173"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 2.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.",
        "label": "Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax",
        "negatedLabel": "Reclassification adjustment for realized loss (gain) on available for sale securities included in net loss",
        "negatedTerseLabel": "Reclassification adjustment for realized (gain) loss on available for sale securities included in net loss",
        "terseLabel": "Reclassification adjustment for realized loss (gain) on marketable securities included in net loss",
        "totalLabel": "Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax, Total"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax": {
     "auth_ref": [
      "r36",
      "r38"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.",
        "label": "OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax",
        "terseLabel": "Unrealized holding (loss) gain on available-for-sale securities",
        "verboseLabel": "Unrealized holding gains (losses) from available for sale securities"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherNonoperatingIncomeAndExpenseTextBlock": {
     "auth_ref": [
      "r61",
      "r62"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for the components of non-operating income or non-operating expense, including, but not limited to, amounts earned from dividends, interest on securities, gain (loss) on securities sold, equity earnings of unconsolidated affiliates, gain (loss) on sales of business, interest expense and other miscellaneous income or expense items.",
        "label": "Other Nonoperating Income and Expense [Text Block]",
        "terseLabel": "Other Income"
       }
      }
     },
     "localname": "OtherNonoperatingIncomeAndExpenseTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncome"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherNonoperatingIncomeExpense": {
     "auth_ref": [
      "r67"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 2.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.",
        "label": "Other Nonoperating Income (Expense)",
        "terseLabel": "Other income",
        "totalLabel": "Other Nonoperating Income (Expense), Total"
       }
      }
     },
     "localname": "OtherNonoperatingIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherNonoperatingIncomeExpenseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Nonoperating Income (Expense) [Abstract]"
       }
      }
     },
     "localname": "OtherNonoperatingIncomeExpenseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherNonoperatingIncomeExpenseMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Primary financial statement caption encompassing other nonoperating income (expense).",
        "label": "Other Nonoperating Income (Expense) [Member]",
        "terseLabel": "Other Income [Member]"
       }
      }
     },
     "localname": "OtherNonoperatingIncomeExpenseMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherPrepaidExpenseCurrent": {
     "auth_ref": [
      "r26",
      "r194"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.",
        "label": "Other Prepaid Expense, Current",
        "terseLabel": "Other prepaid expenses"
       }
      }
     },
     "localname": "OtherPrepaidExpenseCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PayablesAndAccrualsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Payables and Accruals [Abstract]"
       }
      }
     },
     "localname": "PayablesAndAccrualsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt": {
     "auth_ref": [
      "r68",
      "r70",
      "r158"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Payments to Acquire Debt Securities, Available-for-sale",
        "negatedLabel": "Purchases of available for sale securities"
       }
      }
     },
     "localname": "PaymentsToAcquireAvailableForSaleSecuritiesDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": {
     "auth_ref": [
      "r71"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 2.0,
       "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": "Acquisition of property and equipment",
        "totalLabel": "Payments to Acquire Property, Plant, and Equipment, Total"
       }
      }
     },
     "localname": "PaymentsToAcquirePropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": {
     "auth_ref": [
      "r278",
      "r280",
      "r286",
      "r304",
      "r306",
      "r307",
      "r308",
      "r309",
      "r310",
      "r324",
      "r325",
      "r326",
      "r327",
      "r338"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for retirement benefits.",
        "label": "Retirement Benefits [Text Block]",
        "terseLabel": "Defined Contribution Plans"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlans"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PlanNameAxis": {
     "auth_ref": [
      "r343",
      "r344",
      "r345",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r363",
      "r364",
      "r366",
      "r367",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by plan name for share-based payment arrangement.",
        "label": "Plan Name [Axis]"
       }
      }
     },
     "localname": "PlanNameAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PlanNameDomain": {
     "auth_ref": [
      "r343",
      "r344",
      "r345",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r363",
      "r364",
      "r366",
      "r367",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan name for share-based payment arrangement.",
        "label": "Plan Name [Domain]"
       }
      }
     },
     "localname": "PlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PrepaidExpenseAndOtherAssetsCurrent": {
     "auth_ref": [
      "r27"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 3.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits 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",
        "totalLabel": "Total prepaid expenses and other current assets"
       }
      }
     },
     "localname": "PrepaidExpenseAndOtherAssetsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PrepaidExpenseCurrent": {
     "auth_ref": [
      "r4",
      "r26",
      "r193",
      "r194"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails": {
       "order": 0.0,
       "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.",
        "label": "Prepaid Expense, Current",
        "terseLabel": "Prepaid clinical expenses",
        "totalLabel": "Prepaid Expense, Current, Total"
       }
      }
     },
     "localname": "PrepaidExpenseCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfCommonStock": {
     "auth_ref": [
      "r72"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 1.0,
       "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": "Issuance of common stock, net of offering expenses",
        "verboseLabel": "Cash proceeds from issuance of common stock"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities": {
     "auth_ref": [
      "r68",
      "r69",
      "r158"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Proceeds from Sale and Maturity of Debt Securities, Available-for-sale",
        "terseLabel": "Sales and maturities of available for sale securities",
        "totalLabel": "Proceeds from Sale and Maturity of Debt Securities, Available-for-sale, Total"
       }
      }
     },
     "localname": "ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromStockOptionsExercised": {
     "auth_ref": [
      "r72",
      "r382"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow from exercise of option under share-based payment arrangement.",
        "label": "Proceeds from Stock Options Exercised",
        "terseLabel": "Total cash received as a result of employee stock option exercises"
       }
      }
     },
     "localname": "ProceedsFromStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromStockPlans": {
     "auth_ref": [
      "r72"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow associated with the amount received from the stock plan during the period.",
        "label": "Proceeds from Stock Plans",
        "terseLabel": "Issuance of common stock from equity incentive plans"
       }
      }
     },
     "localname": "ProceedsFromStockPlans",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProfitLoss": {
     "auth_ref": [
      "r1",
      "r43",
      "r46",
      "r52",
      "r74",
      "r91",
      "r101",
      "r109",
      "r110",
      "r136",
      "r144",
      "r146",
      "r149",
      "r151",
      "r178",
      "r219",
      "r220",
      "r221",
      "r223",
      "r224",
      "r225",
      "r226",
      "r227",
      "r228",
      "r229",
      "r424",
      "r428",
      "r429",
      "r433",
      "r434",
      "r439",
      "r443",
      "r531"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "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",
        "terseLabel": "Net loss",
        "totalLabel": "Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total"
       }
      }
     },
     "localname": "ProfitLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Property, Plant and Equipment [Abstract]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentByTypeAxis": {
     "auth_ref": [
      "r198"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.",
        "label": "Long-Lived Tangible Asset [Axis]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock": {
     "auth_ref": [
      "r200",
      "r576",
      "r577",
      "r578"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.",
        "label": "Property, Plant and Equipment Disclosure [Text Block]",
        "terseLabel": "Property and Equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipment"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives": {
     "auth_ref": [
      "r195"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).",
        "label": "Property, Plant and Equipment, Estimated Useful Lives",
        "terseLabel": "Estimated useful life of property and equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentEstimatedUsefulLives",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentGross": {
     "auth_ref": [
      "r11",
      "r196"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail": {
       "order": 0.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "Property, Plant and Equipment, Gross",
        "periodEndLabel": "Property, Plant and Equipment, Gross, Ending Balance",
        "periodStartLabel": "Property, Plant and Equipment, Gross, Beginning Balance",
        "terseLabel": "Total property and equipment at cost",
        "totalLabel": "Property, Plant and Equipment, Gross, Total"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentGross",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentLineItems": {
     "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": "Property, Plant and Equipment [Line Items]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentNet": {
     "auth_ref": [
      "r198",
      "r481",
      "r535",
      "r540"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 1.0,
       "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",
        "periodEndLabel": "Property, Plant and Equipment, Net, Ending Balance",
        "periodStartLabel": "Property, Plant and Equipment, Net, Beginning Balance",
        "terseLabel": "Property and equipment, net",
        "totalLabel": "Property and equipment, net"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentPolicyTextBlock": {
     "auth_ref": [
      "r198",
      "r576",
      "r577"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.",
        "label": "Property, Plant and Equipment, Policy [Policy Text Block]",
        "terseLabel": "Property and Equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTextBlock": {
     "auth_ref": [
      "r198"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.",
        "label": "Property, Plant and Equipment [Table Text Block]",
        "terseLabel": "Components of Property and Equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTypeDomain": {
     "auth_ref": [
      "r196"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.",
        "label": "Long-Lived Tangible Asset [Domain]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentUsefulLife": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.",
        "label": "Property, Plant and Equipment, Useful Life",
        "terseLabel": "Estimated useful life of property and equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentUsefulLife",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_RelatedPartyTransactionAxis": {
     "auth_ref": [
      "r305",
      "r476",
      "r477",
      "r478"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of related party transaction.",
        "label": "Related Party Transaction [Axis]"
       }
      }
     },
     "localname": "RelatedPartyTransactionAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionDomain": {
     "auth_ref": [
      "r305"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Transaction between related party.",
        "label": "Related Party Transaction [Domain]"
       }
      }
     },
     "localname": "RelatedPartyTransactionDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RepaymentsOfLongTermCapitalLeaseObligations": {
     "auth_ref": [
      "r73"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).",
        "label": "Repayments of Long-Term Capital Lease Obligations",
        "negatedLabel": "Finance lease principal payments",
        "terseLabel": "Finance lease principal payments"
       }
      }
     },
     "localname": "RepaymentsOfLongTermCapitalLeaseObligations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ResearchAndDevelopmentExpense": {
     "auth_ref": [
      "r391",
      "r517",
      "r590"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "order": 0.0,
       "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",
        "totalLabel": "Research and Development Expense, Total"
       }
      }
     },
     "localname": "ResearchAndDevelopmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "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 [Member]"
       }
      }
     },
     "localname": "ResearchAndDevelopmentExpenseMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfStockbasedCompensationExpenseDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ResearchAndDevelopmentExpensePolicy": {
     "auth_ref": [
      "r391"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for costs it has 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.",
        "label": "Research and Development Expense, Policy [Policy Text Block]",
        "terseLabel": "Research and Development"
       }
      }
     },
     "localname": "ResearchAndDevelopmentExpensePolicy",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ResearchMember": {
     "auth_ref": [
      "r409"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Research tax credit carryforwards arising from certain qualifying expenditures incurred to develop new products and processes.",
        "label": "Research Tax Credit Carryforward [Member]",
        "terseLabel": "R&amp;D Credit Carryforward [Member]"
       }
      }
     },
     "localname": "ResearchMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r21",
      "r251",
      "r481",
      "r538",
      "r554",
      "r556"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 2.0,
       "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)",
        "negatedLabel": "Accumulated deficit",
        "periodEndLabel": "Retained Earnings (Accumulated Deficit), Ending Balance",
        "periodStartLabel": "Retained Earnings (Accumulated Deficit), Beginning Balance",
        "terseLabel": "Accumulated deficit",
        "totalLabel": "Retained Earnings (Accumulated Deficit), Total"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDescriptionOfBusinessAndBasisOfPresentationAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [
      "r0",
      "r98",
      "r99",
      "r100",
      "r102",
      "r108",
      "r110",
      "r179",
      "r383",
      "r384",
      "r385",
      "r413",
      "r414",
      "r437",
      "r551",
      "r553"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]",
        "terseLabel": "Accumulated Deficit [Member]"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetirementPlanNameAxis": {
     "auth_ref": [
      "r257",
      "r258",
      "r259",
      "r260",
      "r261",
      "r262",
      "r263",
      "r264",
      "r265",
      "r266",
      "r267",
      "r268",
      "r269",
      "r270",
      "r271",
      "r272",
      "r273",
      "r274",
      "r275",
      "r276",
      "r277",
      "r278",
      "r279",
      "r281",
      "r282",
      "r283",
      "r284",
      "r285",
      "r286",
      "r287",
      "r288",
      "r289",
      "r290",
      "r291",
      "r292",
      "r293",
      "r294",
      "r295",
      "r296",
      "r297",
      "r298",
      "r299",
      "r300",
      "r301",
      "r302",
      "r303",
      "r305",
      "r308",
      "r311",
      "r312",
      "r313",
      "r314",
      "r315",
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r337"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.",
        "label": "Retirement Plan Name [Axis]"
       }
      }
     },
     "localname": "RetirementPlanNameAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RetirementPlanNameDomain": {
     "auth_ref": [
      "r257",
      "r258",
      "r259",
      "r260",
      "r261",
      "r262",
      "r263",
      "r264",
      "r265",
      "r266",
      "r267",
      "r268",
      "r269",
      "r270",
      "r271",
      "r272",
      "r273",
      "r274",
      "r275",
      "r276",
      "r277",
      "r278",
      "r279",
      "r281",
      "r282",
      "r283",
      "r284",
      "r285",
      "r286",
      "r287",
      "r288",
      "r289",
      "r290",
      "r291",
      "r292",
      "r293",
      "r294",
      "r295",
      "r296",
      "r297",
      "r298",
      "r299",
      "r300",
      "r301",
      "r302",
      "r303",
      "r305",
      "r308",
      "r311",
      "r312",
      "r313",
      "r314",
      "r315",
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r337"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.",
        "label": "Retirement Plan Name [Domain]"
       }
      }
     },
     "localname": "RetirementPlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureDefinedContributionPlansAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": {
     "auth_ref": [
      "r131",
      "r132",
      "r143",
      "r147",
      "r148",
      "r152",
      "r153",
      "r155",
      "r254",
      "r255",
      "r518"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": {
       "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": "Revenue",
        "totalLabel": "Revenue from Contract with Customer, Excluding Assessed Tax, Total"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerExcludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueRecognitionPolicyTextBlock": {
     "auth_ref": [
      "r88",
      "r89"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for revenue. Includes revenue from contract with customer and from other sources.",
        "label": "Revenue [Policy Text Block]",
        "terseLabel": "Revenue Recognition"
       }
      }
     },
     "localname": "RevenueRecognitionPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_Revenues": {
     "auth_ref": [
      "r54",
      "r91",
      "r131",
      "r132",
      "r143",
      "r147",
      "r148",
      "r152",
      "r153",
      "r155",
      "r178",
      "r219",
      "r220",
      "r221",
      "r223",
      "r224",
      "r225",
      "r226",
      "r227",
      "r228",
      "r229",
      "r443",
      "r531"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).",
        "label": "Revenues",
        "totalLabel": "Revenues, Total",
        "verboseLabel": "Revenue recognized"
       }
      }
     },
     "localname": "Revenues",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": {
     "auth_ref": [
      "r469",
      "r474"
     ],
     "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 operating lease liabilities"
       }
      }
     },
     "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RoyaltyGuaranteesCommitmentsAmount": {
     "auth_ref": [
      "r519"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount the entity has committed to make for future royalty guarantees.",
        "label": "Royalty Guarantees, Commitments, Amount",
        "terseLabel": "Royalty payable upon completion of first commercial sale of DME"
       }
      }
     },
     "localname": "RoyaltyGuaranteesCommitmentsAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of accrued liabilities.",
        "label": "Schedule of Accrued Liabilities [Table Text Block]",
        "terseLabel": "Schedule of Accrued Expenses"
       }
      }
     },
     "localname": "ScheduleOfAccruedLiabilitiesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureAccruedExpensesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable": {
     "auth_ref": [
      "r118"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule for securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by Antidilutive Securities.",
        "label": "Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]",
        "terseLabel": "Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]"
       }
      }
     },
     "localname": "ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentialDilutiveCommonShareEquivalentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock": {
     "auth_ref": [
      "r118"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.",
        "label": "Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]",
        "terseLabel": "Schedule of Potential Dilutive Common Share Equivalents"
       }
      }
     },
     "localname": "ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.",
        "label": "Schedule of Available-for-sale Securities Reconciliation [Table Text Block]",
        "terseLabel": "Summary of Fair Value of Company's Investments By Type"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfCashCashEquivalentsAndShortTermInvestmentsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of cash, cash equivalents, and investments.",
        "label": "Cash, Cash Equivalents and Investments [Table Text Block]",
        "terseLabel": "Schedule of Cash Equivalents and Marketable Securities Measured at Fair Value"
       }
      }
     },
     "localname": "ScheduleOfCashCashEquivalentsAndShortTermInvestmentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock": {
     "auth_ref": [
      "r405"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.",
        "label": "Schedule of Deferred Tax Assets and Liabilities [Table Text Block]",
        "terseLabel": "Schedule of Tax Effect of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities"
       }
      }
     },
     "localname": "ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": {
     "auth_ref": [
      "r396"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.",
        "label": "Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]",
        "terseLabel": "Schedule of Reconciliation between Effective Tax Rates and Statutory Rates"
       }
      }
     },
     "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable": {
     "auth_ref": [
      "r375",
      "r387"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about amount recognized for award under share-based payment arrangement. Includes, but is not limited to, amount expensed in statement of income or comprehensive income, amount capitalized in statement of financial position, and corresponding reporting line item in financial statements.",
        "label": "Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]"
       }
      }
     },
     "localname": "ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfStockbasedCompensationExpenseDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock": {
     "auth_ref": [
      "r375"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.",
        "label": "Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]",
        "terseLabel": "Schedule of Stock-Based Compensation Expense"
       }
      }
     },
     "localname": "ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock": {
     "auth_ref": [
      "r92"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of income before income tax between domestic and foreign jurisdictions.",
        "label": "Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]",
        "terseLabel": "Schedule of Components of the Company's Loss Before Income Taxes"
       }
      }
     },
     "localname": "ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfPropertyPlantAndEquipmentTable": {
     "auth_ref": [
      "r198"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.",
        "label": "Property, Plant and Equipment [Table]"
       }
      }
     },
     "localname": "ScheduleOfPropertyPlantAndEquipmentTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePropertyAndEquipmentComponentsOfPropertyAndEquipmentDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyAndEquipmentDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": {
     "auth_ref": [
      "r339",
      "r341",
      "r343",
      "r344",
      "r345",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r363",
      "r364",
      "r366",
      "r367",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about share-based payment arrangement.",
        "label": "Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock": {
     "auth_ref": [
      "r347",
      "r362",
      "r365"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.",
        "label": "Share-Based Payment Arrangement, Option, Activity [Table Text Block]",
        "terseLabel": "Summary of Option Activity"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock": {
     "auth_ref": [
      "r369"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.",
        "label": "Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]",
        "terseLabel": "Schedule of Fair Value of Share-based Awards Measured with Weighted-Average Assumptions"
       }
      }
     },
     "localname": "ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentReportingPolicyPolicyTextBlock": {
     "auth_ref": [
      "r137",
      "r138",
      "r139",
      "r140",
      "r141",
      "r142",
      "r153"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for segment reporting.",
        "label": "Segment Reporting, Policy [Policy Text Block]",
        "terseLabel": "Segment Reporting"
       }
      }
     },
     "localname": "SegmentReportingPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1": {
     "auth_ref": [
      "r343"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period",
        "terseLabel": "Stock options granted, vesting period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate": {
     "auth_ref": [
      "r381"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Discount rate from fair value on purchase date that participants pay for shares.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date",
        "terseLabel": "Percentage of discount for option to purchase common stock"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod": {
     "auth_ref": [
      "r359"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period",
        "terseLabel": "Shares, Granted"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r359"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value",
        "terseLabel": "Shares, Grant date fair value"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber": {
     "auth_ref": [
      "r356",
      "r357"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number",
        "periodEndLabel": "Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance",
        "periodStartLabel": "Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance",
        "terseLabel": "Additional performance stock units remaining"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod": {
     "auth_ref": [
      "r360"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period",
        "terseLabel": "Performance-based restricted stock unit awards outstanding"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate": {
     "auth_ref": [
      "r372"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate",
        "terseLabel": "Expected dividend rate"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfFairValueOfSharebasedAwardsMeasuredWithWeightedaverageAssumptionsDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate": {
     "auth_ref": [
      "r371"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate",
        "terseLabel": "Expected volatility of the underlying stock"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfFairValueOfSharebasedAwardsMeasuredWithWeightedaverageAssumptionsDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate": {
     "auth_ref": [
      "r373"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The risk-free interest rate assumption that is used in valuing an option on its own shares.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate",
        "terseLabel": "Risk-free interest rate"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfFairValueOfSharebasedAwardsMeasuredWithWeightedaverageAssumptionsDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "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]"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of additional shares authorized for issuance under share-based payment arrangement.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized",
        "terseLabel": "Option to purchase additional shares of common stock"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant": {
     "auth_ref": [
      "r381"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant",
        "terseLabel": "Stock options, available for grant"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber": {
     "auth_ref": [
      "r350"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number",
        "terseLabel": "Shares, Exercisable"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice": {
     "auth_ref": [
      "r350"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price",
        "terseLabel": "Weighted Average Exercise Price, Exercisable"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue": {
     "auth_ref": [
      "r364"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value",
        "terseLabel": "Total intrinsic value of stock options exercised"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod": {
     "auth_ref": [
      "r354"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period",
        "negatedLabel": "Shares, Options Cancelled"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross": {
     "auth_ref": [
      "r352"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Gross number of share options (or share units) granted during the period.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross",
        "terseLabel": "Shares, Options Granted"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r363"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value",
        "terseLabel": "Weighted-average grant date fair value of stock options granted"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue": {
     "auth_ref": [
      "r381"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value",
        "periodEndLabel": "Aggregate Intrinsic Value, Outstanding Ending Balance",
        "periodStartLabel": "Aggregate Intrinsic Value, Outstanding Beginning Balance",
        "terseLabel": "Aggregate Intrinsic Value, Outstanding Ending Balance"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber": {
     "auth_ref": [
      "r348",
      "r349"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of options outstanding, including both vested and non-vested options.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number",
        "periodEndLabel": "Shares, Outstanding Ending Balance",
        "periodStartLabel": "Shares, Outstanding Beginning Balance"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice": {
     "auth_ref": [
      "r348",
      "r349"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price",
        "periodEndLabel": "Weighted Average Exercise Price, Outstanding Ending Balance",
        "periodStartLabel": "Weighted Average Exercise Price, Outstanding Beginning Balance"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue": {
     "auth_ref": [
      "r366"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value",
        "terseLabel": "Aggregate Intrinsic Value, Vested and expected to vest"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber": {
     "auth_ref": [
      "r366"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number",
        "terseLabel": "Shares, Vested and expected to vest"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice": {
     "auth_ref": [
      "r366"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price",
        "terseLabel": "Weighted Average Exercise Price, Vested and expected to vest"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": {
     "auth_ref": [
      "r343",
      "r344",
      "r345",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r363",
      "r364",
      "r366",
      "r367",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Award under share-based payment arrangement.",
        "label": "Award Type [Domain]"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [
      "r353"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which option holders acquired shares when converting their stock options into shares.",
        "label": "Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price",
        "terseLabel": "Weighted Average Exercise Price, Options Exercised"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [
      "r354"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.",
        "label": "Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price",
        "terseLabel": "Weighted Average Exercise Price, Options Cancelled"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [
      "r352"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.",
        "label": "Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price",
        "terseLabel": "Weighted Average Exercise Price, Options Granted"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy": {
     "auth_ref": [
      "r346",
      "r368",
      "r369",
      "r370",
      "r371",
      "r374",
      "r386",
      "r390"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for award under share-based payment arrangement. Includes, but is not limited to, methodology and assumption used in measuring cost.",
        "label": "Share-Based Payment Arrangement [Policy Text Block]",
        "terseLabel": "Stock Based Compensation"
       }
      }
     },
     "localname": "ShareBasedCompensationOptionAndIncentivePlansPolicy",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage": {
     "auth_ref": [
      "r343"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of vesting of award under share-based payment arrangement.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage",
        "terseLabel": "Grants vest percentage"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod": {
     "auth_ref": [
      "r344"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period",
        "terseLabel": "Scheme termination period"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1": {
     "auth_ref": [
      "r370"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term",
        "terseLabel": "Expected life of the options"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationScheduleOfFairValueOfSharebasedAwardsMeasuredWithWeightedaverageAssumptionsDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1": {
     "auth_ref": [
      "r381"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value",
        "terseLabel": "Aggregate Intrinsic Value, Exercisable"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1": {
     "auth_ref": [
      "r381"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term",
        "terseLabel": "Weighted Average Remaining Contractual Life, Exercisable"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2": {
     "auth_ref": [
      "r366"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term",
        "terseLabel": "Weighted Average Remaining Contractual Life, Outstanding"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1": {
     "auth_ref": [
      "r366"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term",
        "terseLabel": "Weighted Average Remaining Contractual Life, Vested and expected to vest"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharesIssued": {
     "auth_ref": [
      "r250"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.",
        "label": "Shares, Issued",
        "periodEndLabel": "Balance, shares",
        "periodStartLabel": "Balance, shares"
       }
      }
     },
     "localname": "SharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShortTermLeaseCost": {
     "auth_ref": [
      "r466",
      "r474"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of short-term lease cost, excluding expense for lease with term of one month or less.",
        "label": "Short-Term Lease, Cost",
        "terseLabel": "Short-term lease costs"
       }
      }
     },
     "localname": "ShortTermLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SignificantAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r86",
      "r97"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.",
        "label": "Significant Accounting Policies [Text Block]",
        "terseLabel": "Summary of Significant Accounting Policies"
       }
      }
     },
     "localname": "SignificantAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_StateAndLocalJurisdictionMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Designated tax department of a state or local government entitled to levy and collect income taxes from the entity.",
        "label": "State and Local Jurisdiction [Member]",
        "terseLabel": "State Income Tax [Member]"
       }
      }
     },
     "localname": "StateAndLocalJurisdictionMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r0",
      "r34",
      "r50",
      "r51",
      "r52",
      "r98",
      "r99",
      "r100",
      "r102",
      "r108",
      "r110",
      "r122",
      "r179",
      "r250",
      "r251",
      "r383",
      "r384",
      "r385",
      "r413",
      "r414",
      "r437",
      "r449",
      "r450",
      "r451",
      "r452",
      "r453",
      "r455",
      "r475",
      "r551",
      "r552",
      "r553"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Stockholders' Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [
      "r98",
      "r99",
      "r100",
      "r122",
      "r518"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.",
        "label": "Stock Issued During Period, Shares, Employee Benefit Plan",
        "terseLabel": "Issuance of common stock from equity incentive plans, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesEmployeeBenefitPlan",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesNewIssues": {
     "auth_ref": [
      "r17",
      "r18",
      "r250",
      "r251"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of new stock issued during the period.",
        "label": "Stock Issued During Period, Shares, New Issues",
        "terseLabel": "Common stock, shares issued",
        "verboseLabel": "Issuance of common stock from public offering, net of issuance costs, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised": {
     "auth_ref": [
      "r17",
      "r18",
      "r250",
      "r251",
      "r353"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of share options (or share units) exercised during the current period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period",
        "negatedLabel": "Shares, Options Exercised",
        "terseLabel": "Issuance of common stock from exercise of stock options, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockbasedCompensationSummaryOfOptionActivityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.",
        "label": "Stock Issued During Period, Value, Employee Benefit Plan",
        "terseLabel": "Issuance of common stock from equity incentive plans"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueEmployeeBenefitPlan",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueNewIssues": {
     "auth_ref": [
      "r17",
      "r18",
      "r250",
      "r251"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.",
        "label": "Stock Issued During Period, Value, New Issues",
        "terseLabel": "Issuance of common stock from public offering, net of issuance costs",
        "verboseLabel": "Issuance of common stock, net of issuance costs"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r18",
      "r23",
      "r24",
      "r91",
      "r156",
      "r178",
      "r443",
      "r481"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 0.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.",
        "label": "Stockholders' Equity Attributable to Parent",
        "periodEndLabel": "Balance",
        "periodStartLabel": "Balance",
        "totalLabel": "Total stockholders\u2019 equity"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets",
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Stockholders' Equity Attributable to Parent [Abstract]",
        "terseLabel": "Stockholders\u2019 equity"
       }
      }
     },
     "localname": "StockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityNoteAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Stockholders' Equity Note [Abstract]"
       }
      }
     },
     "localname": "StockholdersEquityNoteAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityNoteDisclosureTextBlock": {
     "auth_ref": [
      "r90",
      "r236",
      "r238",
      "r239",
      "r240",
      "r241",
      "r242",
      "r243",
      "r244",
      "r245",
      "r246",
      "r247",
      "r249",
      "r251",
      "r252",
      "r436"
     ],
     "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": "Stockholder's Equity"
       }
      }
     },
     "localname": "StockholdersEquityNoteDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureStockholdersEquity1"
     ],
     "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]"
       }
      }
     },
     "localname": "SubsequentEventLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventMember": {
     "auth_ref": [
      "r456",
      "r483"
     ],
     "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 [Member]"
       }
      }
     },
     "localname": "SubsequentEventMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventTable": {
     "auth_ref": [
      "r456",
      "r483"
     ],
     "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]"
       }
      }
     },
     "localname": "SubsequentEventTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeAxis": {
     "auth_ref": [
      "r456",
      "r483"
     ],
     "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]"
       }
      }
     },
     "localname": "SubsequentEventTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeDomain": {
     "auth_ref": [
      "r456",
      "r483"
     ],
     "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]"
       }
      }
     },
     "localname": "SubsequentEventTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Subsequent Events [Abstract]"
       }
      }
     },
     "localname": "SubsequentEventsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventsTextBlock": {
     "auth_ref": [
      "r482",
      "r484"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSubsequentEvents1"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_TaxCreditCarryforwardAmount": {
     "auth_ref": [
      "r408"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.",
        "label": "Tax Credit Carryforward, Amount",
        "terseLabel": "Tax credit carry forward amount"
       }
      }
     },
     "localname": "TaxCreditCarryforwardAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TaxCreditCarryforwardAxis": {
     "auth_ref": [
      "r409"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by specific tax credit related to an unused tax credit.",
        "label": "Tax Credit Carryforward [Axis]"
       }
      }
     },
     "localname": "TaxCreditCarryforwardAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TaxCreditCarryforwardNameDomain": {
     "auth_ref": [
      "r409"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The name of the tax credit carryforward.",
        "label": "Tax Credit Carryforward, Name [Domain]"
       }
      }
     },
     "localname": "TaxCreditCarryforwardNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureOtherIncomeAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TaxPeriodAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information about the period subject to enacted tax laws.",
        "label": "Tax Period [Axis]"
       }
      }
     },
     "localname": "TaxPeriodAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TaxPeriodDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identified tax period.",
        "label": "Tax Period [Domain]"
       }
      }
     },
     "localname": "TaxPeriodDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": {
     "auth_ref": [
      "r166",
      "r167",
      "r175",
      "r176",
      "r177",
      "r233",
      "r248",
      "r435",
      "r485",
      "r486",
      "r487",
      "r488",
      "r489",
      "r490",
      "r491",
      "r492",
      "r493",
      "r494",
      "r495",
      "r496",
      "r497",
      "r498",
      "r499",
      "r500",
      "r501",
      "r502",
      "r503",
      "r504",
      "r505",
      "r506",
      "r507",
      "r508",
      "r509",
      "r510",
      "r511",
      "r512",
      "r513",
      "r514",
      "r599",
      "r600",
      "r601",
      "r602",
      "r603",
      "r604",
      "r605"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_USGovernmentAgenciesDebtSecuritiesMember": {
     "auth_ref": [
      "r96",
      "r279",
      "r532"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debentures, notes, and other debt securities issued by US government agencies, for example, but not limited to, Government National Mortgage Association (GNMA or Ginnie Mae). Excludes US treasury securities and debt issued by government-sponsored Enterprises (GSEs), for example, but is 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).",
        "label": "US Government Agencies Debt Securities [Member]",
        "terseLabel": "U.S. Government Agency Securities [Member]",
        "verboseLabel": "Obligations of U.S. Government and Its Agencies [Member]"
       }
      }
     },
     "localname": "USGovernmentAgenciesDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureMarketableSecuritiesSummaryOfFairValueOfCompanySInvestmentsByTypeDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCashEquivalentsAndMarketableSecuritiesMeasuredAtFairValueDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt securities issued by the United States Department of the Treasury, US Government Agencies and US Government-sponsored Enterprises (GSEs). Includes, but not limited to, treasury bills, debt securities issued by the Government National Mortgage Association (Ginnie Mae), and debt securities issued by the Federal National Mortgage Association (Fannie Mae) or the Federal Home Loan Mortgage Corporation (Freddie Mac) which securities have maturities of one year or less.",
        "label": "US Treasury and Government Short-Term Debt Securities [Member]",
        "terseLabel": "Obligations of the U.S. Government and its Agencies [Member]"
       }
      }
     },
     "localname": "USTreasuryAndGovernmentShorttermDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanysInvestmentsWithUnrealizedLossesAggregatedByInvestmentTypeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UnrecognizedTaxBenefits": {
     "auth_ref": [
      "r392",
      "r400"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of unrecognized tax benefits.",
        "label": "Unrecognized Tax Benefits",
        "periodEndLabel": "Unrecognized Tax Benefits, Ending Balance",
        "periodStartLabel": "Unrecognized Tax Benefits, Beginning Balance",
        "terseLabel": "Provision for unrecognized tax benefits",
        "verboseLabel": "Uncertain tax positions"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefits",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail",
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense": {
     "auth_ref": [
      "r398"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.",
        "label": "Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense",
        "terseLabel": "Interest or penalties charges recognized",
        "totalLabel": "Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UseOfEstimates": {
     "auth_ref": [
      "r123",
      "r124",
      "r125",
      "r126",
      "r127",
      "r128",
      "r129"
     ],
     "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/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount": {
     "auth_ref": [
      "r405"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.",
        "label": "Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount",
        "terseLabel": "Change in valuation allowance"
       }
      }
     },
     "localname": "ValuationAllowanceDeferredTaxAssetChangeInAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ValueAddedTaxReceivableCurrent": {
     "auth_ref": [
      "r19"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities. 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": "Value Added Tax Receivable, Current",
        "terseLabel": "VAT receivable"
       }
      }
     },
     "localname": "ValueAddedTaxReceivableCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_VariableLeaseCost": {
     "auth_ref": [
      "r467",
      "r474"
     ],
     "calculation": {
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.",
        "label": "Variable Lease, Cost",
        "terseLabel": "Variable lease costs"
       }
      }
     },
     "localname": "VariableLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/DisclosureLeasesSummaryOfLeaseCostsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": {
     "auth_ref": [
      "r112",
      "r117"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.",
        "label": "Weighted Average Number of Shares Outstanding, Diluted",
        "terseLabel": "Weighted average common shares outstanding, diluted",
        "totalLabel": "Weighted Average Number of Shares Outstanding, Diluted, Total"
       }
      }
     },
     "localname": "WeightedAverageNumberOfDilutedSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": {
     "auth_ref": [
      "r111",
      "r117"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.",
        "label": "Weighted Average Number of Shares Outstanding, Basic",
        "terseLabel": "Weighted average common shares outstanding, basic",
        "totalLabel": "Weighted Average Number of Shares Outstanding, Basic, Total"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingBasic",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.kalvista.com/20220430/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss"
     ],
     "xbrltype": "sharesItemType"
    }
   },
   "unitCount": 7
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760"
  },
  "r10": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21711-107793"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794"
  },
  "r107": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794"
  },
  "r11": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(13))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1505-109256"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1252-109256"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1337-109256"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257"
  },
  "r12": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(14))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=128363288&loc=d3e3842-109258"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "52",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=128363288&loc=d3e4984-109258"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=125520817&loc=d3e70191-108054"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6161-108592"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6191-108592"
  },
  "r127": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6061-108592"
  },
  "r128": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6132-108592"
  },
  "r129": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6143-108592"
  },
  "r13": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(17))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "275",
   "URI": "https://asc.fasb.org/topic&trid=2134479"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8864-108599"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8864-108599"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8864-108599"
  },
  "r14": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(18))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8864-108599"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8864-108599"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8864-108599"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "31",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r15": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(22))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "42",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 4.E)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=122038336&loc=d3e74512-122707"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562"
  },
  "r158": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=124260329&loc=d3e26626-111562"
  },
  "r16": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(23))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aa)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27198-111563"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563"
  },
  "r17": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(28))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "320",
   "URI": "https://asc.fasb.org/topic&trid=2196928"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "321",
   "URI": "https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "321",
   "URI": "https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "321",
   "URI": "https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "323",
   "URI": "https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(1)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(2)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(3)(a)(4))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922895-210455"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456"
  },
  "r193": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "10",
   "Topic": "340",
   "URI": "https://asc.fasb.org/extlink&oid=126905020&loc=d3e5879-108316"
  },
  "r194": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "340",
   "URI": "https://asc.fasb.org/extlink&oid=6387103&loc=d3e6435-108320"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=126905813&loc=d3e1205-110223"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "205",
   "URI": "https://asc.fasb.org/topic&trid=2122149"
  },
  "r20": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "360",
   "URI": "https://asc.fasb.org/topic&trid=2155823"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "410",
   "URI": "https://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "420",
   "URI": "https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "440",
   "URI": "https://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "440",
   "URI": "https://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "https://asc.fasb.org/topic&trid=2144648"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14615-108349"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349"
  },
  "r21": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(3))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Subparagraph": "(SAB Topic 5.Y.Q2)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Subparagraph": "(SAB Topic 5.Y.Q4)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "https://asc.fasb.org/topic&trid=2127136"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=126907419&loc=d3e10037-110241"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=124440162&loc=d3e12053-110248"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=126907907&loc=d3e13051-110250"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(i))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(4))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(ii))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii)(A))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iv))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(5))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(i))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(A))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(B))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iv))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(5))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1I",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69B",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69C",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r237": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r238": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r239": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(31))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(i)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r241": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496180-112644"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(32))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r250": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "505",
   "URI": "https://asc.fasb.org/topic&trid=2208762"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920602&loc=SL49130690-203046-203046"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(10)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(7))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r262": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r263": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r264": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(6)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r265": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(7)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(8)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r267": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(9)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r269": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(9))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r270": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r271": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(4)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r273": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(5)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r274": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(6)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r275": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(7)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r276": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(8)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r278": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(i)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r279": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(ii)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(a))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iii)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r281": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(01)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r282": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r283": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(A)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(B)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(C)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(03)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r287": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r288": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r289": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(a),20,24)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r290": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(1)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(2)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(3)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(4)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r295": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(5)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r296": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(6)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r297": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(7)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r298": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(i)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r299": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(j)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.20)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r300": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(1)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r301": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(2)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r302": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(3)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r303": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(4)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r304": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(l)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r305": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r306": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(o)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r307": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(p)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r308": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(q)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r309": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(r)(1)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.21)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r310": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(r)(2)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r311": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2410-114920"
  },
  "r312": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920"
  },
  "r313": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920"
  },
  "r314": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r315": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r316": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r317": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r318": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r319": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.25)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r320": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(6)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r321": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(7)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r322": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920"
  },
  "r323": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920"
  },
  "r324": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921"
  },
  "r325": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=21916913&loc=d3e273930-122802"
  },
  "r326": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=6414203&loc=d3e39689-114964"
  },
  "r327": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "70",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942"
  },
  "r328": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r329": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r33": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r330": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r331": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r332": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)(1)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r333": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)(2)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r334": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(1)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r335": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(2)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r336": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(3)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r337": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948"
  },
  "r338": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "715",
   "URI": "https://asc.fasb.org/topic&trid=2235017"
  },
  "r339": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=126961718&loc=SL116886442-113899"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29-31)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r340": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=126961718&loc=d3e4534-113899"
  },
  "r341": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=126961718&loc=d3e4549-113899"
  },
  "r342": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r343": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r344": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r345": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r346": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r347": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r348": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(i)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r349": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(ii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580"
  },
  "r350": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r351": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r352": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(01)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r353": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(02)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r354": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(03)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r355": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(04)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r356": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(i)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r357": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(ii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r358": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r359": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(01)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580"
  },
  "r360": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(02)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r361": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(03)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r362": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r363": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r364": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r365": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r366": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r367": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r368": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r369": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580"
  },
  "r370": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(i)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r371": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(ii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r372": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(iii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r373": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(iv)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r374": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(v)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r375": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r376": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(1)(i)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r377": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(2)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r378": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(2)(i)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r379": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(i)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580"
  },
  "r380": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(l)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r381": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r382": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=SL79508275-113901"
  },
  "r383": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333"
  },
  "r384": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333"
  },
  "r385": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333"
  },
  "r386": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 14.D.2.Q6)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809"
  },
  "r387": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 14.F)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809"
  },
  "r388": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=126964447&loc=d3e11149-113907"
  },
  "r389": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=126964447&loc=d3e11178-113907"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=d3e681-108580"
  },
  "r390": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "718",
   "URI": "https://asc.fasb.org/topic&trid=2228938"
  },
  "r391": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "730",
   "URI": "https://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373"
  },
  "r392": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318"
  },
  "r393": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=d3e32247-109318"
  },
  "r394": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=d3e32280-109318"
  },
  "r395": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32672-109319"
  },
  "r396": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319"
  },
  "r397": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319"
  },
  "r398": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319"
  },
  "r399": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580"
  },
  "r400": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319"
  },
  "r401": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319"
  },
  "r402": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32840-109319"
  },
  "r403": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319"
  },
  "r404": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319"
  },
  "r405": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319"
  },
  "r406": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32847-109319"
  },
  "r407": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319"
  },
  "r408": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319"
  },
  "r409": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=d3e689-108580"
  },
  "r410": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319"
  },
  "r411": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319"
  },
  "r412": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319"
  },
  "r413": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r414": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(3)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r415": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.5.Q1)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r416": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.7)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r417": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.3)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r418": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.4)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r419": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.C)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL34724391-108580"
  },
  "r420": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123586238&loc=d3e38679-109324"
  },
  "r421": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "270",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338"
  },
  "r422": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331"
  },
  "r423": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "740",
   "URI": "https://asc.fasb.org/topic&trid=2144680"
  },
  "r424": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4569616-111683"
  },
  "r425": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r426": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r427": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=d3e5614-111684"
  },
  "r428": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r429": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r43": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580"
  },
  "r430": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c),(3)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r431": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685"
  },
  "r432": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685"
  },
  "r433": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686"
  },
  "r434": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4591552-111686"
  },
  "r435": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(f)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126731327&loc=d3e90205-114008"
  },
  "r436": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126731327&loc=SL126733271-114008"
  },
  "r437": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(3)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r438": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(4)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r439": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580"
  },
  "r440": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258"
  },
  "r441": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258"
  },
  "r442": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258"
  },
  "r443": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612"
  },
  "r444": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=126980362&loc=d3e28228-110885"
  },
  "r445": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "20",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=123602790&loc=d3e30226-110892"
  },
  "r446": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=125521441&loc=d3e30690-110894"
  },
  "r447": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=124440516&loc=d3e30840-110895"
  },
  "r448": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=123444420&loc=d3e33268-110906"
  },
  "r449": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580"
  },
  "r450": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r451": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r452": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r453": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r454": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r455": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901"
  },
  "r456": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=6450520&loc=d3e32618-110901"
  },
  "r457": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "830",
   "URI": "https://asc.fasb.org/topic&trid=2175825"
  },
  "r458": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399"
  },
  "r459": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580"
  },
  "r460": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977"
  },
  "r461": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977"
  },
  "r462": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977"
  },
  "r463": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980"
  },
  "r464": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980"
  },
  "r465": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r466": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r467": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r468": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(1)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r469": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(2)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580"
  },
  "r470": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(3)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r471": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(4)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r472": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r473": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980"
  },
  "r474": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "53",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971"
  },
  "r475": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)(iii)(03)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846"
  },
  "r476": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r477": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r478": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864"
  },
  "r479": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=d3e557-108580"
  },
  "r480": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765"
  },
  "r481": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766"
  },
  "r482": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "855",
   "URI": "https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662"
  },
  "r483": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "855",
   "URI": "https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662"
  },
  "r484": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "855",
   "URI": "https://asc.fasb.org/topic&trid=2122774"
  },
  "r485": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)(i)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r486": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)(ii)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r487": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r488": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r489": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL116659661-227067"
  },
  "r490": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r491": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r492": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r493": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r494": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r495": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r496": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r497": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r498": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728"
  },
  "r499": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124442407-227067"
  },
  "r500": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746"
  },
  "r501": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746"
  },
  "r502": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746"
  },
  "r503": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(4)(i)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746"
  },
  "r504": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r505": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r506": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r507": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(4)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r508": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(5)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r509": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(6)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124442411-227067"
  },
  "r510": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(7)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r511": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(b)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r512": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r513": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r514": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746"
  },
  "r515": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "910",
   "URI": "https://asc.fasb.org/extlink&oid=126937589&loc=SL119991595-234733"
  },
  "r516": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "310",
   "Subparagraph": "(b)",
   "Topic": "912",
   "URI": "https://asc.fasb.org/extlink&oid=126938201&loc=d3e55415-109406"
  },
  "r517": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "730",
   "Topic": "912",
   "URI": "https://asc.fasb.org/extlink&oid=6472174&loc=d3e58812-109433"
  },
  "r518": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.L)",
   "Topic": "924",
   "URI": "https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856"
  },
  "r519": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "440",
   "Topic": "928",
   "URI": "https://asc.fasb.org/extlink&oid=6473578&loc=d3e63223-108013"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067"
  },
  "r520": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "940",
   "URI": "https://asc.fasb.org/extlink&oid=126941158&loc=d3e41242-110953"
  },
  "r521": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "940",
   "URI": "https://asc.fasb.org/subtopic&trid=2176304"
  },
  "r522": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(11))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r523": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(23))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r524": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(6))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r525": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.17)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r526": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(15))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r527": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(22))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r528": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(23))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r529": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(26))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124507222&loc=d3e1436-108581"
  },
  "r530": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(27))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r531": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.9-05(b)(2))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884"
  },
  "r532": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Subparagraph": "(b)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126980459&loc=d3e62557-112803"
  },
  "r533": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Subparagraph": "(a)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126980459&loc=SL120269850-112803"
  },
  "r534": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "https://asc.fasb.org/subtopic&trid=2209399"
  },
  "r535": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=124429447&loc=SL124453093-239630"
  },
  "r536": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(12))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r537": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(3))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r538": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r539": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(25))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(1))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r540": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(8))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r541": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.(a),19)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r542": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(18))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r543": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(19))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r544": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(22))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r545": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(23))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r546": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(8))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r547": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(9))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r548": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439"
  },
  "r549": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126561865&loc=SL117783719-158441"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(10))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r550": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126561865&loc=SL117819544-158441"
  },
  "r551": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r552": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(1)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r553": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(2)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r554": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(i)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r555": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(ii)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r556": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(2)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r557": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124508989&loc=d3e19393-158473"
  },
  "r558": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 1))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r559": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 6))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(20))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r560": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 7))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r561": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 1))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r562": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 6))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r563": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 7))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r564": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 1))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r565": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 6))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r566": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 7))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010"
  },
  "r567": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column B)(Footnote 2))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010"
  },
  "r568": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column C)(Footnote 2))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010"
  },
  "r569": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column A))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(21))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r570": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column B))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010"
  },
  "r571": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column C))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010"
  },
  "r572": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column D))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010"
  },
  "r573": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "946",
   "URI": "https://asc.fasb.org/subtopic&trid=2324412"
  },
  "r574": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "310",
   "Subparagraph": "(SX 210.12-29(Footnote 4))",
   "Topic": "948",
   "URI": "https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014"
  },
  "r575": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "440",
   "Subparagraph": "(a)",
   "Topic": "954",
   "URI": "https://asc.fasb.org/extlink&oid=6491277&loc=d3e6429-115629"
  },
  "r576": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Subparagraph": "(d)",
   "Topic": "958",
   "URI": "https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916"
  },
  "r577": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "958",
   "URI": "https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916"
  },
  "r578": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "958",
   "URI": "https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916"
  },
  "r579": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column B))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(24))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r580": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column C))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r581": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column D))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r582": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column E))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r583": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column F))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r584": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column G))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r585": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column H))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r586": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column I))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r587": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 2))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r588": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Subparagraph": "(c)",
   "Topic": "976",
   "URI": "https://asc.fasb.org/extlink&oid=6497875&loc=d3e22274-108663"
  },
  "r589": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Subparagraph": "(b)",
   "Topic": "978",
   "URI": "https://asc.fasb.org/extlink&oid=126945304&loc=d3e27327-108691"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(25))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r590": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "985",
   "URI": "https://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756"
  },
  "r591": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r592": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r593": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-23"
  },
  "r594": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r595": {
   "Name": "Form 10-K",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "310"
  },
  "r596": {
   "Name": "Form 20-F",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "220",
   "Subsection": "f"
  },
  "r597": {
   "Name": "Form 40-F",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "240",
   "Subsection": "f"
  },
  "r598": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1"
  },
  "r599": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(a)",
   "Publisher": "SEC",
   "Section": "1402"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6904-107765"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(4))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r600": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(b)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(1)"
  },
  "r601": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(b)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(2)"
  },
  "r602": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(b)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(3)"
  },
  "r603": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(c)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(2)(i)"
  },
  "r604": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(c)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(2)(ii)"
  },
  "r605": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(c)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(2)(iii)"
  },
  "r606": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(b)",
   "Publisher": "SEC",
   "Section": "1403"
  },
  "r607": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r608": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(7))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(9))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.4)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7(b))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.8)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.9)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3151-108585"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585"
  },
  "r7": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 201.5-02(24))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3000-108585"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3521-108585"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 201.5-02(25))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4273-108586"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4313-108586"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4332-108586"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=SL98516268-108586"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=126899994&loc=d3e18726-107790"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=126899994&loc=d3e18823-107790"
  },
  "r88": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=126899994&loc=d3e18823-107790"
  },
  "r89": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=126899994&loc=d3e18823-107790"
  },
  "r9": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 201.5-02(26))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(e)(1))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(g)(1)(ii))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(1)(Note 1))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(1))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(2))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(m)(1)(ii)(A))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "https://asc.fasb.org/topic&trid=2122369"
  },
  "r98": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21914-107793"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21930-107793"
  }
 },
 "version": "2.1"
}
