{ "instance": { "sage-10k_20191231.htm": { "axisCustom": 0, "axisStandard": 23, "contextCount": 256, "dts": { "calculationLink": { "local": [ "sage-20191231_cal.xml" ] }, "definitionLink": { "local": [ "sage-20191231_def.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-eedm-def-2019-01-31.xml", "http://xbrl.fasb.org/srt/2019/elts/srt-eedm1-def-2019-01-31.xml" ] }, "inline": { "local": [ "sage-10k_20191231.htm" ] }, "labelLink": { "local": [ "sage-20191231_lab.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-doc-2019-01-31.xml", "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml" ] }, "presentationLink": { "local": [ "sage-20191231_pre.xml" ] }, "referenceLink": { "remote": [ "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-ref-2019-01-31.xml", "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml" ] }, "schema": { "local": [ "sage-20191231.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", "https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd", "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd", "https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd", "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd", "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd", "https://xbrl.sec.gov/exch/2019/exch-2019-01-31.xsd", "https://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd", "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd", "https://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd", "https://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-roles-2019-01-31.xsd", "https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-parts-codification-2019-01-31.xsd", "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd" ] } }, "elementCount": 545, "entityCount": 1, "hidden": { "http://fasb.org/us-gaap/2019-01-31": 20, "http://www.sagerx.com/20191231": 2, "http://xbrl.sec.gov/dei/2019-01-31": 5, "total": 27 }, "keyCustom": 62, "keyStandard": 354, "memberCustom": 45, "memberStandard": 29, "nsprefix": "sage", "nsuri": "http://www.sagerx.com/20191231", "report": { "R1": { "firstAnchor": { "ancestors": [ "p", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "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.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation", "shortName": "Document and Entity Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R10": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100090 - Disclosure - Balance Sheet Components", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponents", "shortName": "Balance Sheet Components", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R11": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100100 - Disclosure - Commitments and Contingencies", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingencies", "shortName": "Commitments and Contingencies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R12": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CollaborativeArrangementDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100110 - Disclosure - Collaboration Agreement", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreement", "shortName": "Collaboration Agreement", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CollaborativeArrangementDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R13": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PreferredStockTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100120 - Disclosure - Preferred Stock", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosurePreferredStock", "shortName": "Preferred Stock", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PreferredStockTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R14": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "sage:CommonStockTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100130 - Disclosure - Common Stock", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStock", "shortName": "Common Stock", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "sage:CommonStockTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R15": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100140 - Disclosure - Stock-Based Compensation", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensation", "shortName": "Stock-Based Compensation", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R16": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100150 - Disclosure - Net Loss Per Share", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShare", "shortName": "Net Loss Per Share", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R17": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100160 - Disclosure - Income Taxes", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxes", "shortName": "Income Taxes", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R18": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100170 - Disclosure - Employee Benefit Plan", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlan", "shortName": "Employee Benefit Plan", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R19": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:QuarterlyFinancialInformationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100180 - Disclosure - Selected Quarterly Financial Data (Unaudited)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnaudited", "shortName": "Selected Quarterly Financial Data (Unaudited)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:QuarterlyFinancialInformationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R2": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100010 - Statement - Consolidated Balance Sheets", "role": "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets", "shortName": "Consolidated Balance Sheets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R20": { "firstAnchor": { "ancestors": [ "us-gaap:SignificantAccountingPoliciesTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100190 - Disclosure - Summary of Significant Accounting Policies (Policies)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies", "shortName": "Summary of Significant Accounting Policies (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "us-gaap:SignificantAccountingPoliciesTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R21": { "firstAnchor": { "ancestors": [ "us-gaap:FairValueMeasurementInputsDisclosureTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100200 - Disclosure - Fair Value Measurements (Tables)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsTables", "shortName": "Fair Value Measurements (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:FairValueMeasurementInputsDisclosureTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R22": { "firstAnchor": { "ancestors": [ "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100210 - Disclosure - Balance Sheet Components (Tables)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsTables", "shortName": "Balance Sheet Components (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R23": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "sage:ScheduleOfOperatingLeasesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100220 - Disclosure - Commitments and Contingencies (Tables)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables", "shortName": "Commitments and Contingencies (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "sage:ScheduleOfOperatingLeasesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R24": { "firstAnchor": { "ancestors": [ "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100230 - Disclosure - Stock-Based Compensation (Tables)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationTables", "shortName": "Stock-Based Compensation (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R25": { "firstAnchor": { "ancestors": [ "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100240 - Disclosure - Net Loss Per Share (Tables)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareTables", "shortName": "Net Loss Per Share (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R26": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100250 - Disclosure - Income Taxes (Tables)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesTables", "shortName": "Income Taxes (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R27": { "firstAnchor": { "ancestors": [ "us-gaap:QuarterlyFinancialInformationTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100260 - Disclosure - Selected Quarterly Financial Data (Unaudited) (Tables)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedTables", "shortName": "Selected Quarterly Financial Data (Unaudited) (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:QuarterlyFinancialInformationTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R28": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RetainedEarningsAccumulatedDeficit", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100270 - Disclosure - Nature of the Business - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail", "shortName": "Nature of the Business - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapShortTermDebtTypeAxis_sageConvertibleNotesMember_us-gaapStatementClassOfStockAxis_us-gaapRedeemableConvertiblePreferredStockMember_us-gaapSubsidiarySaleOfStockAxis_us-gaapIPOMember_20100501_20191231", "decimals": "-5", "lang": null, "name": "sage:ProceedsFromIssuanceOrSaleOfEquityAndNotes", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R29": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20181231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RestrictedCashAndCashEquivalentsNoncurrent", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100280 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail", "shortName": "Summary of Significant Accounting Policies - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190226_20190227", "decimals": "INF", "lang": null, "name": "us-gaap:StockIssuedDuringPeriodSharesNewIssues", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R3": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:PreferredStockParOrStatedValuePerShare", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD_xbrlishares", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100020 - Statement - Consolidated Balance Sheets (Parenthetical)", "role": "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical", "shortName": "Consolidated Balance Sheets (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:PreferredStockParOrStatedValuePerShare", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD_xbrlishares", "xsiNil": "false" } }, "R30": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100290 - Disclosure - Fair Value Measurements - Summary of Company's Money Market Funds and Marketable Securities (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail", "shortName": "Fair Value Measurements - Summary of Company's Money Market Funds and Marketable Securities (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R31": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "INF", "first": true, "lang": null, "name": "sage:FairValueAssetsTransfersAmongLevel1Level2AndLevel3Amount", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100300 - Disclosure - Fair Value Measurements - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail", "shortName": "Fair Value Measurements - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "INF", "first": true, "lang": null, "name": "sage:FairValueAssetsTransfersAmongLevel1Level2AndLevel3Amount", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R32": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100310 - Disclosure - Fair Value Measurements - Summary of Gross Unrealized Gains and Losses of Marketable Securities (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail", "shortName": "Fair Value Measurements - Summary of Gross Unrealized Gains and Losses of Marketable Securities (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R33": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:PropertyPlantAndEquipmentTextBlock", "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PropertyPlantAndEquipmentGross", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100320 - Disclosure - Balance Sheet Components - Summary of Property and Equipment, Net (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail", "shortName": "Balance Sheet Components - Summary of Property and Equipment, Net (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:PropertyPlantAndEquipmentTextBlock", "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PropertyPlantAndEquipmentGross", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R34": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Depreciation", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100330 - Disclosure - Balance Sheet Components - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail", "shortName": "Balance Sheet Components - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapPropertyPlantAndEquipmentByTypeAxis_sageComputerHardwareAndSoftwareMember_20190101_20191231", "decimals": null, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentUsefulLife", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R35": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock", "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "sage:AccruedResearchAndDevelopmentCosts", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100340 - Disclosure - Balance Sheet Components - Summary of Accrued Expenses (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail", "shortName": "Balance Sheet Components - Summary of Accrued Expenses (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock", "us-gaap:SupplementalBalanceSheetDisclosuresTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "sage:AccruedResearchAndDevelopmentCosts", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R36": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeaseExpirationDate1", "reportCount": 1, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100350 - Disclosure - Commitments and Contingencies - Operating Leases - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "shortName": "Commitments and Contingencies - Operating Leases - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": null, "lang": "en-US", "name": "us-gaap:LessorOperatingLeaseRenewalTerm", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R37": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseRightOfUseAsset", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100360 - Disclosure - Commitments and Contingencies - Schedule of Consolidated Balance Sheets of Operating Leases (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail", "shortName": "Commitments and Contingencies - Schedule of Consolidated Balance Sheets of Operating Leases (Detail)", "subGroupType": "details", "uniqueAnchor": null }, "R38": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LeaseCostTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseCost", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100370 - Disclosure - Commitments and Contingencies - Schedule of Lease Costs Recorded in Consolidated Statements of Operations and Comprehensive Loss (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail", "shortName": "Commitments and Contingencies - Schedule of Lease Costs Recorded in Consolidated Statements of Operations and Comprehensive Loss (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LeaseCostTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseCost", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R39": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "sage:ScheduleOfOperatingLeasesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseLiability", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100380 - Disclosure - Commitments and Contingencies - Schedule of Minimum Lease Payments (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail", "shortName": "Commitments and Contingencies - Schedule of Minimum Lease Payments (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapAdjustmentsForNewAccountingPronouncementsAxis_us-gaapAccountingStandardsUpdate201602Member_20191231", "decimals": "-3", "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R4": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100030 - Statement - Consolidated Statements of Operations and Comprehensive Loss", "role": "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss", "shortName": "Consolidated Statements of Operations and Comprehensive Loss", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "lang": null, "name": "sage:CostOfSales", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R40": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20181231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100400 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Lease Payments, Under Non-Cancelable Operating Leases (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail", "shortName": "Commitments and Contingencies - Schedule of Future Minimum Lease Payments, Under Non-Cancelable Operating Leases (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20181231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R41": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "sage:ScheduleOfWeightedAverageRemainingLeaseTermAndWeightedAverageDiscountRateOfOurOperatingLeasesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100410 - Disclosure - Commitments and Contingencies - Schedule of Weighted Average Remaining Lease Term and Weighted Average Discount Rate of Our Operating Leases (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfWeightedAverageRemainingLeaseTermAndWeightedAverageDiscountRateOfOurOperatingLeasesDetail", "shortName": "Commitments and Contingencies - Schedule of Weighted Average Remaining Lease Term and Weighted Average Discount Rate of Our Operating Leases (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "sage:ScheduleOfWeightedAverageRemainingLeaseTermAndWeightedAverageDiscountRateOfOurOperatingLeasesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" } }, "R42": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "sage:ScheduleOfSupplementalDisclosureOfCashFlowInformationRelatedToOperatingLeasesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeasePayments", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100420 - Disclosure - Commitments and Contingencies - Schedule of Supplemental Disclosure of Cash Flow Information Related To Operating Leases (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfSupplementalDisclosureOfCashFlowInformationRelatedToOperatingLeasesDetail", "shortName": "Commitments and Contingencies - Schedule of Supplemental Disclosure of Cash Flow Information Related To Operating Leases (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "sage:ScheduleOfSupplementalDisclosureOfCashFlowInformationRelatedToOperatingLeasesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeasePayments", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R43": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ResearchAndDevelopmentExpense", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100430 - Disclosure - Commitments and Contingencies - CyDex License Agreement - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "shortName": "Commitments and Contingencies - CyDex License Agreement - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_sageCydexLicenseAgreementMember_20190101_20191231", "decimals": "-5", "lang": null, "name": "us-gaap:ResearchAndDevelopmentExpense", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R44": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_sageUniversityOfCaliforniaLicenseAgreementsMember_20150601_20150630", "decimals": "0", "first": true, "lang": null, "name": "sage:UpFrontPayment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100440 - Disclosure - Commitments and Contingencies - University of California License Agreements - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "shortName": "Commitments and Contingencies - University of California License Agreements - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_sageUniversityOfCaliforniaLicenseAgreementsMember_20150601_20150630", "decimals": "0", "first": true, "lang": null, "name": "sage:UpFrontPayment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R45": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_sageWashingtonUniversityLicenseAgreementMember_20131101_20131130", "decimals": "0", "first": true, "lang": null, "name": "sage:UpfrontNonrefundablePayment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100450 - Disclosure - Commitments and Contingencies - Washington University License Agreement - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "shortName": "Commitments and Contingencies - Washington University License Agreement - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_sageWashingtonUniversityLicenseAgreementMember_20131101_20131130", "decimals": "0", "first": true, "lang": null, "name": "sage:UpfrontNonrefundablePayment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R46": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_sageConsultingAgreementMember_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "sage:ResearchAndDevelopmentExpenseRelatedToMilestonePayment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100460 - Disclosure - Commitments and Contingencies - Consulting Agreement - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "shortName": "Commitments and Contingencies - Consulting Agreement - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_sageConsultingAgreementMember_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "sage:ResearchAndDevelopmentExpenseRelatedToMilestonePayment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R47": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "us-gaap:QuarterlyFinancialInformationTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191001_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100470 - Disclosure - Collaboration Agreement - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "shortName": "Collaboration Agreement - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:CollaborativeArrangementDisclosureTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapFiniteLivedIntangibleAssetsByMajorClassAxis_sageLicenseThreeMember_us-gaapTypeOfArrangementAxis_sageShionogiCollaborationAgreementMember_20180611_20180612", "decimals": null, "lang": "en-US", "name": "sage:CollaborationAgreementEffectiveDate", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R48": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:PreferredStockSharesAuthorized", "reportCount": 1, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100480 - Disclosure - Preferred Stock - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosurePreferredStockAdditionalInformationDetail", "shortName": "Preferred Stock - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": null }, "R49": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockSharesAuthorized", "reportCount": 1, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100490 - Disclosure - Common Stock - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStockAdditionalInformationDetail", "shortName": "Common Stock - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "sage:CommonStockTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "INF", "lang": null, "name": "us-gaap:DividendsCommonStock", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R5": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20161231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:StockholdersEquity", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100040 - Statement - Consolidated Statements of Changes in Stockholders' Equity", "role": "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity", "shortName": "Consolidated Statements of Changes in Stockholders' Equity", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20161231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:StockholdersEquity", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R50": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100500 - Disclosure - Stock-Based Compensation - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "shortName": "Stock-Based Compensation - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R51": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapAwardTypeAxis_us-gaapRestrictedStockUnitsRSUMember_20181231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "reportCount": 1, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100510 - Disclosure - Stock-Based Compensation - Summary of Activity Relating to Restricted Stock Units (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail", "shortName": "Stock-Based Compensation - Summary of Activity Relating to Restricted Stock Units (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapAwardTypeAxis_us-gaapRestrictedStockUnitsRSUMember_20190101_20191231", "decimals": "INF", "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R52": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100520 - Disclosure - Stock-Based Compensation - Summary of Stock-Based Compensation Expense Recognized (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseRecognizedDetail", "shortName": "Stock-Based Compensation - Summary of Stock-Based Compensation Expense Recognized (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapIncomeStatementLocationAxis_us-gaapResearchAndDevelopmentExpenseMember_20190101_20191231", "decimals": "-3", "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R53": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100530 - Disclosure - Stock-Based Compensation - Summary of Stock-Based Compensation Expense by Award Type Recognized (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail", "shortName": "Stock-Based Compensation - Summary of Stock-Based Compensation Expense by Award Type Recognized (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapAwardTypeAxis_sageEmployeeStockPurchasePlanMember_20190101_20191231", "decimals": "-3", "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R54": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "2", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100540 - Disclosure - Stock-Based Compensation - Summary of Weighted Average Assumptions Used to Compute Fair Value of Option Granted (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfWeightedAverageAssumptionsUsedToComputeFairValueOfOptionGrantedDetail", "shortName": "Stock-Based Compensation - Summary of Weighted Average Assumptions Used to Compute Fair Value of Option Granted (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "2", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" } }, "R55": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber", "reportCount": 1, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100550 - Disclosure - Stock-Based Compensation - Summary of Activity Relating to Time Based and Performance Based Stock Options (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail", "shortName": "Stock-Based Compensation - Summary of Activity Relating to Time Based and Performance Based Stock Options (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_us-gaapAwardTypeAxis_us-gaapEmployeeStockOptionMember_20190101_20191231", "decimals": "INF", "lang": null, "name": "us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R56": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "us-gaap:QuarterlyFinancialInformationTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191001_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100560 - Disclosure - Net Loss Per Share - Summary of Basic and Diluted Net Loss Per Share (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail", "shortName": "Net Loss Per Share - Summary of Basic and Diluted Net Loss Per Share (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "0", "lang": null, "name": "us-gaap:WeightedAverageNumberOfSharesOutstandingBasic", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R57": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100570 - Disclosure - Net Loss Per Share - Summary of Anti-Dilutive Common Stock Equivalents Outstanding (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail", "shortName": "Net Loss Per Share - Summary of Anti-Dilutive Common Stock Equivalents Outstanding (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R58": { "firstAnchor": { "ancestors": [ "p", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CurrentIncomeTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100580 - Disclosure - Income Taxes - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail", "shortName": "Income Taxes - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CurrentIncomeTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R59": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unitRef": "U_xbrlipure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100590 - Disclosure - Income Taxes - Summary of Reconciliation of U.S. Statutory Rate to Company's Effective Tax Rate (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail", "shortName": "Income Taxes - Summary of Reconciliation of U.S. Statutory Rate to Company's Effective Tax Rate (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "3", "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" } }, "R6": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100050 - Statement - Consolidated Statements of Cash Flows", "role": "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows", "shortName": "Consolidated Statements of Cash Flows", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R60": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredTaxAssetsOperatingLossCarryforwards", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100600 - Disclosure - Income Taxes - Summary of Significant Components of Company's Net Deferred Tax Asset (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail", "shortName": "Income Taxes - Summary of Significant Components of Company's Net Deferred Tax Asset (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredTaxAssetsOperatingLossCarryforwards", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R61": { "firstAnchor": { "ancestors": [ "p", "us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:DefinedContributionPlanEmployerMatchingContributionPercentOfMatch", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100610 - Disclosure - Employee Benefit Plan - Additional Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlanAdditionalInformationDetail", "shortName": "Employee Benefit Plan - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:DefinedContributionPlanEmployerMatchingContributionPercentOfMatch", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" } }, "R62": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "us-gaap:QuarterlyFinancialInformationTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191001_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100620 - Disclosure - Selected Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Information (Detail)", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedSummaryOfQuarterlyFinancialInformationDetail", "shortName": "Selected Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "us-gaap:QuarterlyFinancialInformationTextBlock", "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20191001_20191231", "decimals": "-3", "lang": null, "name": "us-gaap:OperatingExpenses", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R7": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100060 - Disclosure - Nature of the Business", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusiness", "shortName": "Nature of the Business", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R8": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100070 - Disclosure - Summary of Significant Accounting Policies", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies", "shortName": "Summary of Significant Accounting Policies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R9": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueMeasurementInputsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100080 - Disclosure - Fair Value Measurements", "role": "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurements", "shortName": "Fair Value Measurements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "sage-10k_20191231.htm", "contextRef": "C_0001597553_20190101_20191231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueMeasurementInputsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } } }, "segmentCount": 79, "tag": { "dei_AmendmentFlag": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.", "label": "Amendment Flag", "terseLabel": "Amendment Flag" } } }, "localname": "AmendmentFlag", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_CityAreaCode": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Area code of city", "label": "City Area Code", "terseLabel": "City Area Code" } } }, "localname": "CityAreaCode", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "xbrltype": "stringItemType" }, "dei_CurrentFiscalYearEndDate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "End date of current fiscal year in the format --MM-DD.", "label": "Current Fiscal Year End Date", "terseLabel": "Current Fiscal Year End Date" } } }, "localname": "CurrentFiscalYearEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "gMonthDayItemType" }, "dei_DocumentAnnualReport": { "auth_ref": [ "r326" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true only for a form used as an annual report.", "label": "Document Annual Report", "terseLabel": "Document Annual Report" } } }, "localname": "DocumentAnnualReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "fiscalPeriodItemType" }, "dei_DocumentFiscalYearFocus": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.", "label": "Document Fiscal Year Focus", "terseLabel": "Document Fiscal Year Focus" } } }, "localname": "DocumentFiscalYearFocus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "gYearItemType" }, "dei_DocumentPeriodEndDate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.", "label": "Document Period End Date", "terseLabel": "Document Period End Date" } } }, "localname": "DocumentPeriodEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "dateItemType" }, "dei_DocumentTransitionReport": { "auth_ref": [ "r325" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true only for a form used as a transition report.", "label": "Document Transition Report", "terseLabel": "Document Transition Report" } } }, "localname": "DocumentTransitionReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "submissionTypeItemType" }, "dei_DocumentsIncorporatedByReferenceTextBlock": { "auth_ref": [ "r323" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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 Line1", "terseLabel": "Entity Address, Address Line One" } } }, "localname": "EntityAddressAddressLine1", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "stateOrProvinceItemType" }, "dei_EntityCentralIndexKey": { "auth_ref": [ "r327" ], "lang": { "en-US": { "role": { "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.", "label": "Entity Central Index Key", "terseLabel": "Entity Central Index Key" } } }, "localname": "EntityCentralIndexKey", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityEmergingGrowthCompany": { "auth_ref": [ "r327" ], "lang": { "en-US": { "role": { "documentation": "Indicate if registrant meets the emerging growth company criteria.", "label": "Entity Emerging Growth Company", "terseLabel": "Entity Emerging Growth Company" } } }, "localname": "EntityEmergingGrowthCompany", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "fileNumberItemType" }, "dei_EntityFilerCategory": { "auth_ref": [ "r327" ], "lang": { "en-US": { "role": { "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.", "label": "Entity Filer Category", "terseLabel": "Entity Filer Category" } } }, "localname": "EntityFilerCategory", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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 Country Code", "terseLabel": "Entity Incorporation, State or Country Code" } } }, "localname": "EntityIncorporationStateCountryCode", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "edgarStateCountryItemType" }, "dei_EntityInteractiveDataCurrent": { "auth_ref": [ "r328" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).", "label": "Entity Interactive Data Current", "terseLabel": "Entity Interactive Data Current" } } }, "localname": "EntityInteractiveDataCurrent", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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", "terseLabel": "Entity Public Float" } } }, "localname": "EntityPublicFloat", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "monetaryItemType" }, "dei_EntityRegistrantName": { "auth_ref": [ "r327" ], "lang": { "en-US": { "role": { "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.", "label": "Entity Registrant Name", "terseLabel": "Entity Registrant Name" } } }, "localname": "EntityRegistrantName", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityShellCompany": { "auth_ref": [ "r327" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.", "label": "Entity Shell Company", "terseLabel": "Entity Shell Company" } } }, "localname": "EntityShellCompany", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntitySmallBusiness": { "auth_ref": [ "r327" ], "lang": { "en-US": { "role": { "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).", "label": "Entity Small Business", "terseLabel": "Entity Small Business" } } }, "localname": "EntitySmallBusiness", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityTaxIdentificationNumber": { "auth_ref": [ "r327" ], "lang": { "en-US": { "role": { "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.", "label": "Entity Tax Identification Number", "terseLabel": "Entity Tax Identification Number" } } }, "localname": "EntityTaxIdentificationNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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", "terseLabel": "Entity Voluntary Filers" } } }, "localname": "EntityVoluntaryFilers", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityWellKnownSeasonedIssuer": { "auth_ref": [], "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", "terseLabel": "Entity Well-known Seasoned Issuer" } } }, "localname": "EntityWellKnownSeasonedIssuer", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_LocalPhoneNumber": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Local phone number for entity.", "label": "Local Phone Number", "terseLabel": "Local Phone Number" } } }, "localname": "LocalPhoneNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_Security12bTitle": { "auth_ref": [ "r322" ], "lang": { "en-US": { "role": { "documentation": "Title of a 12(b) registered security.", "label": "Security12b Title", "terseLabel": "Title of 12(b) Security" } } }, "localname": "Security12bTitle", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "securityTitleItemType" }, "dei_SecurityExchangeName": { "auth_ref": [ "r324" ], "lang": { "en-US": { "role": { "documentation": "Name of the Exchange on which a security is registered.", "label": "Security Exchange Name", "terseLabel": "Security Exchange Name" } } }, "localname": "SecurityExchangeName", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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", "terseLabel": "Trading Symbol" } } }, "localname": "TradingSymbol", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "tradingSymbolItemType" }, "sage_AccruedResearchAndDevelopmentCosts": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail": { "order": 10010.0, "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 accrued research and development costs, such as clinical trial costs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accrued Research And Development Costs", "terseLabel": "Accrued research and development costs" } } }, "localname": "AccruedResearchAndDevelopmentCosts", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail" ], "xbrltype": "monetaryItemType" }, "sage_AdditionalMilestonePaymentsBasedOnAchievementOfCertainMilestones": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Additional milestone payments based on achievement of certain milestones.", "label": "Additional Milestone Payments Based On Achievement Of Certain Milestones", "verboseLabel": "Future milestone payments" } } }, "localname": "AdditionalMilestonePaymentsBasedOnAchievementOfCertainMilestones", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_AdditionalPaymentsBasedOnAchievementOfCertainMilestones": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Additional payments based on achievement of certain milestones.", "label": "Additional Payments Based On Achievement Of Certain Milestones", "terseLabel": "Expected milestone payments" } } }, "localname": "AdditionalPaymentsBasedOnAchievementOfCertainMilestones", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_AreaOfOfficeSpace": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Area of office space in square feet.", "label": "Area Of Office Space", "terseLabel": "Additional Office space rented under operating lease", "verboseLabel": "Office space rent under operating lease" } } }, "localname": "AreaOfOfficeSpace", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "areaItemType" }, "sage_AveragePercentageOnTieredRoyalties": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Average percentage on tiered royalties.", "label": "Average Percentage On Tiered Royalties", "terseLabel": "Average percentage on tiered royalties" } } }, "localname": "AveragePercentageOnTieredRoyalties", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "sage_BusinessRisksAndUncertaintiesPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Business risks and uncertainties policy.", "label": "Business Risks And Uncertainties Policy [Text Block]", "terseLabel": "Risks and Uncertainties" } } }, "localname": "BusinessRisksAndUncertaintiesPolicyTextBlock", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "sage_CapitalExpendituresIncurredFinancedByLandlordTenantIncentiveButNotYetPaid": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Capital expenditures incurred, financed by landlord tenant incentive, but not yet paid.", "label": "Capital Expenditures Incurred Financed By Landlord Tenant Incentive But Not Yet Paid", "terseLabel": "Purchases of property and equipment financed with landlord tenant incentive" } } }, "localname": "CapitalExpendituresIncurredFinancedByLandlordTenantIncentiveButNotYetPaid", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "sage_ClinicalDevelopmentAndRegulatoryMilestoneMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Clinical development and regulatory milestone.", "label": "Clinical Development And Regulatory Milestone [Member]", "terseLabel": "Clinical Development and Regulatory Milestones [Member]" } } }, "localname": "ClinicalDevelopmentAndRegulatoryMilestoneMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_ClinicalDevelopmentMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Clinical development milestones.", "label": "Clinical Development Milestones [Member]", "terseLabel": "Clinical Development [Member]" } } }, "localname": "ClinicalDevelopmentMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_CollaborationAgreementAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Collaboration agreement.", "label": "Collaboration Agreement [Abstract]" } } }, "localname": "CollaborationAgreementAbstract", "nsuri": "http://www.sagerx.com/20191231", "xbrltype": "stringItemType" }, "sage_CollaborationAgreementEffectiveDate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Collaboration agreement efective date.", "label": "Collaboration Agreement Effective Date", "terseLabel": "Collaboration agreement effective date" } } }, "localname": "CollaborationAgreementEffectiveDate", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "dateItemType" }, "sage_CollaborationAgreementRegulatoryAndCommercialEventBasedAdditionalMilestonePaymentReceivable": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Collaboration agreement regulatory and commercial event based additional milestone payment receivable.", "label": "Collaboration Agreement Regulatory And Commercial Event Based Additional Milestone Payment Receivable", "terseLabel": "Additional milestone payment receivable" } } }, "localname": "CollaborationAgreementRegulatoryAndCommercialEventBasedAdditionalMilestonePaymentReceivable", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_CollaborationRevenueMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Collaboration revenue.", "label": "Collaboration Revenue [Member]", "terseLabel": "Collaboration Revenue [Member]" } } }, "localname": "CollaborationRevenueMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "domainItemType" }, "sage_CommercialMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commercial milestones.", "label": "Commercial Milestones [Member]", "terseLabel": "Commercial Milestones [Member]" } } }, "localname": "CommercialMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_CommitmentsAndContingenciesLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commitments and contingencies.", "label": "Commitments And Contingencies [Line Items]", "terseLabel": "Commitments And Contingencies [Line Items]" } } }, "localname": "CommitmentsAndContingenciesLineItems", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_CommitmentsAndContingenciesTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commitments And Contingencies.", "label": "Commitments And Contingencies [Table]", "terseLabel": "Commitments And Contingencies [Table]" } } }, "localname": "CommitmentsAndContingenciesTable", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_CommonStockSharesOutstandingReservedForIssuanceIncreasePercentage": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The percentage increase in number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding, including vested options.", "label": "Common Stock Shares Outstanding Reserved For Issuance Increase Percentage", "terseLabel": "Percentage of increase on outstanding shares of Common stock" } } }, "localname": "CommonStockSharesOutstandingReservedForIssuanceIncreasePercentage", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "sage_CommonStockTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Common stock.", "label": "Common Stock [Text Block]", "terseLabel": "Common Stock" } } }, "localname": "CommonStockTextBlock", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStock" ], "xbrltype": "textBlockItemType" }, "sage_ComputerHardwareAndSoftwareMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Computer hardware and software.", "label": "Computer Hardware And Software [Member]", "terseLabel": "Computer Hardware and Software [Member]" } } }, "localname": "ComputerHardwareAndSoftwareMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "xbrltype": "domainItemType" }, "sage_ConsultantMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Consultant.", "label": "Consultant [Member]", "terseLabel": "Consultant [Member]" } } }, "localname": "ConsultantMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_ConsultingAgreementMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Consulting agreement.", "label": "Consulting Agreement [Member]", "terseLabel": "Consulting Agreement [Member]" } } }, "localname": "ConsultingAgreementMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_ConvertibleNotesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Convertible notes.", "label": "Convertible Notes [Member]", "terseLabel": "Convertible Notes [Member]" } } }, "localname": "ConvertibleNotesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_CostOfSales": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10090.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Cost of sales.", "label": "Cost Of Sales", "terseLabel": "Cost of goods sold" } } }, "localname": "CostOfSales", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "sage_CydexLicenseAgreementMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "CyDex license agreement.", "label": "Cydex License Agreement [Member]", "terseLabel": "CyDex License Agreement [Member]" } } }, "localname": "CydexLicenseAgreementMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_DebtInstrumentFairValueCarryingValueAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Debt Instrument Fair Value Carrying Value [Abstract]", "label": "Debt Instrument Fair Value Carrying Value [Abstract]" } } }, "localname": "DebtInstrumentFairValueCarryingValueAbstract", "nsuri": "http://www.sagerx.com/20191231", "xbrltype": "stringItemType" }, "sage_DebtInstrumentFairValueCarryingValueLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Debt instrument fair value carrying value.", "label": "Debt Instrument Fair Value Carrying Value [Line Items]", "terseLabel": "Debt Instrument Fair Value Carrying Value [Line Items]" } } }, "localname": "DebtInstrumentFairValueCarryingValueLineItems", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_DebtInstrumentFairValueCarryingValueTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Debt instrument fair value carrying value.", "label": "Debt Instrument Fair Value Carrying Value [Table]", "terseLabel": "Debt Instrument Fair Value Carrying Value [Table]" } } }, "localname": "DebtInstrumentFairValueCarryingValueTable", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_DeferredTaxAssetsCapitalizedStartUpCosts": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10040.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Deferred tax assets capitalized start-up costs.", "label": "Deferred Tax Assets Capitalized Start Up Costs", "terseLabel": "Capitalized start-up costs" } } }, "localname": "DeferredTaxAssetsCapitalizedStartUpCosts", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "sage_DeferredTaxAssetsRightOfUseAsset": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10090.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Deferred tax assets right of use asset.", "label": "Deferred Tax Assets Right Of Use Asset", "terseLabel": "Right of use asset" } } }, "localname": "DeferredTaxAssetsRightOfUseAsset", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "sage_DeferredTaxAssetsStockOptions": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10080.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Deferred tax assets stock options.", "label": "Deferred Tax Assets Stock Options", "terseLabel": "Stock options" } } }, "localname": "DeferredTaxAssetsStockOptions", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "sage_DeferredTaxAssetsTaxCreditCarryforwardsResearchExpirationYear": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Deferred tax assets tax credit carryforwards research expiration year.", "label": "Deferred Tax Assets Tax Credit Carryforwards Research Expiration Year", "terseLabel": "Research and development tax credits carryforwards expiration year" } } }, "localname": "DeferredTaxAssetsTaxCreditCarryforwardsResearchExpirationYear", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "gYearItemType" }, "sage_EmployeeStockPurchasePlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Employee stock purchase plan.", "label": "Employee Stock Purchase Plan [Member]", "terseLabel": "Employee Stock Purchase Plan [Member]" } } }, "localname": "EmployeeStockPurchasePlanMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail" ], "xbrltype": "domainItemType" }, "sage_FairValueAssetsTransfersAmongLevel1Level2AndLevel3Amount": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of transfers of assets measured on a recurring basis among Level 1, Level 2 and Level 3.", "label": "Fair Value Assets Transfers Among Level1 Level2 And Level3 Amount", "terseLabel": "Transfers among the Level 1, Level 2 and Level 3 categories" } } }, "localname": "FairValueAssetsTransfersAmongLevel1Level2AndLevel3Amount", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_FederalNetOperatingLossCarryForwardsExpirationYear": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Federal net operating loss carry forwards expiration year.", "label": "Federal Net Operating Loss Carry Forwards Expiration Year", "terseLabel": "Federal net operating loss carryforwards expiration year" } } }, "localname": "FederalNetOperatingLossCarryForwardsExpirationYear", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "gYearItemType" }, "sage_FirstAndSecondClinicalDevelopmentMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "First and second clinical development milestones.", "label": "First And Second Clinical Development Milestones [Member]", "terseLabel": "First and Second Clinical Development Milestones [Member]" } } }, "localname": "FirstAndSecondClinicalDevelopmentMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_FirstAndSecondRegulatoryMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "First and second regulatory milestones.", "label": "First And Second Regulatory Milestones [Member]", "terseLabel": "First and Second Regulatory Milestones [Member]" } } }, "localname": "FirstAndSecondRegulatoryMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_IncomeTaxDisclosureLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Income Tax Disclosure [Line Items]", "label": "Income Tax Disclosure [Line Items]", "terseLabel": "Income Tax Disclosure [Line Items]" } } }, "localname": "IncomeTaxDisclosureLineItems", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_IncomeTaxDisclosureTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Income Tax Disclosure [Table]", "label": "Income Tax Disclosure [Table]", "terseLabel": "Income Tax Disclosure [Table]" } } }, "localname": "IncomeTaxDisclosureTable", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_IncreaseDecreaseInOperatingLeaseLiabilitiesCurrent": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10190.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Increase decrease in operating lease liabilities current.", "label": "Increase Decrease In Operating Lease Liabilities Current", "terseLabel": "Operating lease liabilities, current" } } }, "localname": "IncreaseDecreaseInOperatingLeaseLiabilitiesCurrent", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "sage_IncreaseDecreaseInOperatingLeaseLiabilitiesNonCurrent": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10200.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Increase decrease in operating lease liabilities non current.", "label": "Increase Decrease In Operating Lease Liabilities Non Current", "terseLabel": "Operating lease liabilities, non-current" } } }, "localname": "IncreaseDecreaseInOperatingLeaseLiabilitiesNonCurrent", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "sage_IncreaseDecreaseInOperatingLeaseRightOfUseAsset": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10180.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Increase decrease in operating lease right of use asset.", "label": "Increase Decrease In Operating Lease Right Of Use Asset", "negatedLabel": "Right-of-use operating asset" } } }, "localname": "IncreaseDecreaseInOperatingLeaseRightOfUseAsset", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "sage_IncreaseInAreaOfOfficeSpace": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Increase in area of office space.", "label": "Increase In Area Of Office Space", "terseLabel": "Increased office space rent" } } }, "localname": "IncreaseInAreaOfOfficeSpace", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail" ], "xbrltype": "areaItemType" }, "sage_InitialPublicOfferingPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Initial public offering policy, policy.", "label": "Initial Public Offering Policy Policy [Text Block]", "terseLabel": "Public Offerings" } } }, "localname": "InitialPublicOfferingPolicyPolicyTextBlock", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "sage_IntangibleAssetRelatedToMilestone": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Intangible asset related to milestone.", "label": "Intangible Asset Related To Milestone", "terseLabel": "Intangible asset related to milestone" } } }, "localname": "IntangibleAssetRelatedToMilestone", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_InternationalCommercialPaperMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "International commercial paper.", "label": "International Commercial Paper [Member]", "terseLabel": "International Commercial Paper [Member]" } } }, "localname": "InternationalCommercialPaperMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "sage_InternationalCorporateBondsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "International corporate bonds.", "label": "International Corporate Bonds [Member]", "terseLabel": "International Corporate Bonds [Member]" } } }, "localname": "InternationalCorporateBondsMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "sage_IssueOfCommonStockObligation": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Issue of common stock obligation.", "label": "Issue Of Common Stock Obligation", "terseLabel": "Issuance of common stock, shares" } } }, "localname": "IssueOfCommonStockObligation", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "sharesItemType" }, "sage_LeaseRightOfUseAsset": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Lease, Right-of-Use Asset.", "label": "Lease Right Of Use Asset", "verboseLabel": "Right-of-use assets" } } }, "localname": "LeaseRightOfUseAsset", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_LessorOperatingLeaseRemainingLeaseTerms": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Lessor operating lease remaining lease rerms.", "label": "Lessor Operating Lease Remaining Lease Terms", "terseLabel": "Operating lease remaining lease terms" } } }, "localname": "LessorOperatingLeaseRemainingLeaseTerms", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "sage_LicenseAgreementMaximumTerm": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "License agreement maximum term.", "label": "License Agreement Maximum Term", "terseLabel": "Licenses Expiration period, maximum" } } }, "localname": "LicenseAgreementMaximumTerm", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "sage_LicenseMaintenanceCostAnnual": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "License maintenance cost annual.", "label": "License Maintenance Cost Annual", "terseLabel": "Annual license maintenance fee" } } }, "localname": "LicenseMaintenanceCostAnnual", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_LicenseOneMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "License one.", "label": "License One [Member]", "terseLabel": "Brexanolone [Member]" } } }, "localname": "LicenseOneMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_LicenseThreeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "License three.", "label": "License Three [Member]", "terseLabel": "SAGE-217 [Member]" } } }, "localname": "LicenseThreeMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_LicenseTwoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "License two.", "label": "License Two [Member]", "terseLabel": "SAGE-689 [Member]" } } }, "localname": "LicenseTwoMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_MarketableSecuritiesHeldToMaturityFairValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Marketable securities held to maturity fair value.", "label": "Marketable Securities Held To Maturity Fair Value", "terseLabel": "Marketable securities fair value held to maturity" } } }, "localname": "MarketableSecuritiesHeldToMaturityFairValue", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_MarketableSecuritiesMaturityPeriod": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Marketable securities maturity period.", "label": "Marketable Securities Maturity Period", "terseLabel": "Marketable securities held, matuirity period" } } }, "localname": "MarketableSecuritiesMaturityPeriod", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "sage_MarketableSecuritiesRemainingContractualMaturities": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The remaining contractual period for marketable securities.", "label": "Marketable Securities Remaining Contractual Maturities", "terseLabel": "Marketable securities, remaining contractual maturities" } } }, "localname": "MarketableSecuritiesRemainingContractualMaturities", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "sage_MaximumMilestoneShareBasedPayments": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum milestone share based payments.", "label": "Maximum Milestone Share Based Payments", "terseLabel": "Shares of common stock for attaining milestones" } } }, "localname": "MaximumMilestoneShareBasedPayments", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail" ], "xbrltype": "sharesItemType" }, "sage_MilestoneBasedShareCompensation": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Milestone based share compensation.", "label": "Milestone Based Share Compensation", "terseLabel": "Milestone based share compensation, shares issued" } } }, "localname": "MilestoneBasedShareCompensation", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail" ], "xbrltype": "sharesItemType" }, "sage_MilestoneFourMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Milestone four.", "label": "Milestone Four [Member]", "terseLabel": "Milestone Two [Member]" } } }, "localname": "MilestoneFourMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_MilestoneMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Milestone.", "label": "Milestone [Member]", "terseLabel": "Milestones [Member]" } } }, "localname": "MilestoneMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_MilestonePayments": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Milestone payments.", "label": "Milestone Payments", "terseLabel": "Milestone payments" } } }, "localname": "MilestonePayments", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_MilestonePaymentsRelatedToIntangibleAssets": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Milestone payments related to intangible assets.", "label": "Milestone Payments Related To Intangible Assets", "terseLabel": "Milestone payments related to intangible assets" } } }, "localname": "MilestonePaymentsRelatedToIntangibleAssets", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_MilestoneStockCompensation": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Milestone stock compensation.", "label": "Milestone Stock Compensation", "terseLabel": "Payments for stock issued upon reaching a milestone" } } }, "localname": "MilestoneStockCompensation", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_MilestoneThreeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Milestone three.", "label": "Milestone Three [Member]", "terseLabel": "Milestone Three [Member]" } } }, "localname": "MilestoneThreeMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_NatureOfBusinessLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nature of business.", "label": "Nature Of Business [Line Items]", "terseLabel": "Nature Of Business [Line Items]" } } }, "localname": "NatureOfBusinessLineItems", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_NatureOfBusinessTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nature of business.", "label": "Nature Of Business [Table]", "terseLabel": "Nature Of Business [Table]" } } }, "localname": "NatureOfBusinessTable", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_NonEmployeeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Non employee.", "label": "Non Employee [Member]", "terseLabel": "Non-employees [Member]" } } }, "localname": "NonEmployeeMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_NoncashOrPartNoncashLandlordTenantIncentive": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Noncash or part noncash landlord tenant incentive.", "label": "Noncash Or Part Noncash Landlord Tenant Incentive", "terseLabel": "Landlord tenant incentive included in other current assets" } } }, "localname": "NoncashOrPartNoncashLandlordTenantIncentive", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "sage_NumberOfMarketableSecuritiesNotPartOfRemainingContractualMaturitiesOfOneYearOrLess": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of marketable securities not part of remaining contractual maturities of one year or less.", "label": "Number Of Marketable Securities Not Part Of Remaining Contractual Maturities Of One Year Or Less", "terseLabel": "Number of marketable securities not part of remaining contractual maturities of one year or less" } } }, "localname": "NumberOfMarketableSecuritiesNotPartOfRemainingContractualMaturitiesOfOneYearOrLess", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "integerItemType" }, "sage_NumberOfMilestonesAchieved": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of milestones achieved.", "label": "Number Of Milestones Achieved", "terseLabel": "Milestones achieved" } } }, "localname": "NumberOfMilestonesAchieved", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "integerItemType" }, "sage_OperatingLeaseAssetsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating lease assets.", "label": "Operating Lease Assets [Abstract]", "terseLabel": "Assets" } } }, "localname": "OperatingLeaseAssetsAbstract", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail" ], "xbrltype": "stringItemType" }, "sage_OperatingLeaseFiveMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating lease five member.", "label": "Operating Lease Five [Member]", "terseLabel": "Operating Lease Five [Member]" } } }, "localname": "OperatingLeaseFiveMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_OperatingLeaseFourMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating lease four.", "label": "Operating Lease Four [Member]", "terseLabel": "Operating Lease Four [Member]" } } }, "localname": "OperatingLeaseFourMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_OperatingLeaseLiabilityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating lease iability.", "label": "Operating Lease Liability [Abstract]", "terseLabel": "Liabilities" } } }, "localname": "OperatingLeaseLiabilityAbstract", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail" ], "xbrltype": "stringItemType" }, "sage_OperatingLeaseOneMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating lease one.", "label": "Operating Lease One [Member]", "terseLabel": "Operating Lease One [Member]" } } }, "localname": "OperatingLeaseOneMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_OperatingLeaseSixMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating lease six.", "label": "Operating Lease Six [Member]", "terseLabel": "Operating Lease Six [Member]" } } }, "localname": "OperatingLeaseSixMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_OperatingLeaseThreeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating lease three.", "label": "Operating Lease Three [Member]", "terseLabel": "Operating Lease Three [Member]" } } }, "localname": "OperatingLeaseThreeMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_OperatingLeaseTwoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating lease two.", "label": "Operating Lease Two [Member]", "terseLabel": "Operating Lease Two [Member]" } } }, "localname": "OperatingLeaseTwoMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_PatentCostsPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Patent costs policy.", "label": "Patent Costs Policy [Text Block]", "terseLabel": "Patent Costs" } } }, "localname": "PatentCostsPolicyTextBlock", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "sage_PaymentForClinicalDevelopmentMilestones": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Payment for clinical development milestones.", "label": "Payment For Clinical Development Milestones", "terseLabel": "Milestone payments" } } }, "localname": "PaymentForClinicalDevelopmentMilestones", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_PercentageOfNetSalesRequiredForRoyaltyEntitlement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Royalty percentage on net sales.", "label": "Percentage Of Net Sales Required For Royalty Entitlement", "terseLabel": "Percentage of net sales paid as royalties" } } }, "localname": "PercentageOfNetSalesRequiredForRoyaltyEntitlement", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "sage_PercentageOfPaymentIfMilestoneAchieved": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Percentage Of Payment If Milestone Achieved", "terseLabel": "Percentage Of Milestone Achieved" } } }, "localname": "PercentageOfPaymentIfMilestoneAchieved", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "sage_PercentageOfPerformanceBasedGrantsThatWereAchieved": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percentage of performance based grants that were achieved.", "label": "Percentage Of Performance Based Grants That Were Achieved", "terseLabel": "Percentage of performance based grants that were achieved" } } }, "localname": "PercentageOfPerformanceBasedGrantsThatWereAchieved", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "sage_PerformanceBasedStockOptionsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Performance-based stock options.", "label": "Performance Based Stock Options [Member]", "terseLabel": "Performance-Based Stock Options [Member]" } } }, "localname": "PerformanceBasedStockOptionsMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_PerformanceMilestoneMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Performance milestone.", "label": "Performance Milestone [Member]", "terseLabel": "Performance Milestone [Member]" } } }, "localname": "PerformanceMilestoneMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_PerformanceRestrictedStockUnitsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Performance restricted stock units.", "label": "Performance Restricted Stock Units [Member]", "terseLabel": "Performance Restricted Stock Units [Member]" } } }, "localname": "PerformanceRestrictedStockUnitsMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_PremiumOnMarketableSecurities": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10130.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Premium on marketable securities.", "label": "Premium On Marketable Securities", "negatedLabel": "Premium on marketable securities" } } }, "localname": "PremiumOnMarketableSecurities", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "sage_ProceedsFromIssuanceOfCommonStockNetOfOfferingExpenses": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Proceeds from issuance of common stock net of offering expenses.", "label": "Proceeds From Issuance Of Common Stock Net Of Offering Expenses", "terseLabel": "Proceeds from public offering of common stock, net of commissions and underwriting discounts and estimated offering costs" } } }, "localname": "ProceedsFromIssuanceOfCommonStockNetOfOfferingExpenses", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_ProceedsFromIssuanceOrSaleOfEquityAndNotes": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from the issuance of equity and debt.", "label": "Proceeds From Issuance Or Sale Of Equity And Notes", "terseLabel": "Net proceeds from sale of equity and notes" } } }, "localname": "ProceedsFromIssuanceOrSaleOfEquityAndNotes", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_PublicOfferingCostsIncludedInCurrentLiabilities": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Public offering costs included in current liabilities.", "label": "Public Offering Costs Included In Current Liabilities", "terseLabel": "Public offering costs included in accounts payable" } } }, "localname": "PublicOfferingCostsIncludedInCurrentLiabilities", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "sage_RegentsOfUniversityOfCaliforniaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regents Of University Of California.", "label": "Regents Of University Of California [Member]", "terseLabel": "The Regents of University of California [Member]" } } }, "localname": "RegentsOfUniversityOfCaliforniaMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_RegulatoryAndSalesMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory and sales milestones.", "label": "Regulatory And Sales Milestones [Member]", "terseLabel": "Regulatory and Sales Milestones [Member]" } } }, "localname": "RegulatoryAndSalesMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_RegulatoryMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory milestones.", "label": "Regulatory Milestones [Member]", "terseLabel": "Regulatory Milestones [Member]" } } }, "localname": "RegulatoryMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_ResearchAndDevelopmentExpenseRelatedToIssueOfCommonStockObligation": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Research and development expense related to issue of common stock obligation.", "label": "Research And Development Expense Related To Issue Of Common Stock Obligation", "terseLabel": "Research and development expense related to issue of common stock obligation" } } }, "localname": "ResearchAndDevelopmentExpenseRelatedToIssueOfCommonStockObligation", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_ResearchAndDevelopmentExpenseRelatedToMilestonePayment": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Research and development expense related to milestone payment.", "label": "Research And Development Expense Related To Milestone Payment", "terseLabel": "Research and development expense related to milestone expense" } } }, "localname": "ResearchAndDevelopmentExpenseRelatedToMilestonePayment", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_SalesMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Sales milestones.", "label": "Sales Milestones [Member]", "terseLabel": "Sales Milestones [Member]" } } }, "localname": "SalesMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_ScenarioOneMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Scenario one.", "label": "Scenario One [Member]", "terseLabel": "After The Effective Date [Member]" } } }, "localname": "ScenarioOneMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_ScenarioTwoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Scenario two.", "label": "Scenario Two [Member]", "terseLabel": "After The First Sale [Member]" } } }, "localname": "ScenarioTwoMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_ScheduleOfOperatingLeasesTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of operating leases.", "label": "Schedule Of Operating Leases Table [Text Block]", "terseLabel": "Schedule of Consolidated Balance Sheets of Operating Leases" } } }, "localname": "ScheduleOfOperatingLeasesTableTextBlock", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" ], "xbrltype": "textBlockItemType" }, "sage_ScheduleOfSupplementalDisclosureOfCashFlowInformationRelatedToOperatingLeasesTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of supplemental disclosure of cash flow information related to operating leases.", "label": "Schedule Of Supplemental Disclosure Of Cash Flow Information Related To Operating Leases Table [Text Block]", "terseLabel": "Schedule of Supplemental Disclosure of Cash Flow Information Related to Operating Leases" } } }, "localname": "ScheduleOfSupplementalDisclosureOfCashFlowInformationRelatedToOperatingLeasesTableTextBlock", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" ], "xbrltype": "textBlockItemType" }, "sage_ScheduleOfWeightedAverageRemainingLeaseTermAndWeightedAverageDiscountRateOfOurOperatingLeasesTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of weighted average remaining lease term and weighted average discount rate of our operating leases.", "label": "Schedule Of Weighted Average Remaining Lease Term And Weighted Average Discount Rate Of Our Operating Leases Table [Text Block]", "terseLabel": "Schedule of Weighted Average Remaining Lease Term and Weighted Average Discount Rate of Our Operating Leases" } } }, "localname": "ScheduleOfWeightedAverageRemainingLeaseTermAndWeightedAverageDiscountRateOfOurOperatingLeasesTableTextBlock", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" ], "xbrltype": "textBlockItemType" }, "sage_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardCliffVestingPeriod": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share based compensation arrangement by share based payment award award cliff vesting period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Award Cliff Vesting Period", "terseLabel": "Share based compensation, vest period" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardCliffVestingPeriod", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "sage_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMonthAndYear": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share based compensation arrangement by share based payment award award vesting period month and year.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Month And Year", "terseLabel": "Restricted stock units vesting period month and year" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMonthAndYear", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "gYearMonthItemType" }, "sage_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageEstimatedForfeitureRate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share based compensation arrangement by share based payment award estimated forfeiture rate.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Weighted Average Estimated Forfeiture Rate", "terseLabel": "Share option, weighted-average forfeiture rates" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageEstimatedForfeitureRate", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "sage_ShionogiCollaborationAgreementMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Shionogi collaboration agreement.", "label": "Shionogi Collaboration Agreement [Member]", "terseLabel": "Shionogi Collaboration Agreement [Member]" } } }, "localname": "ShionogiCollaborationAgreementMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_StateNetOperatingLossCarryForwardsExpirationYear": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "State net operating loss carry forwards expiration year.", "label": "State Net Operating Loss Carry Forwards Expiration Year", "terseLabel": "State net operating loss carryforwards expiration year" } } }, "localname": "StateNetOperatingLossCarryForwardsExpirationYear", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "gYearItemType" }, "sage_SummaryOfSignificantAccountingPoliciesLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Summary of significant accounting policies.", "label": "Summary Of Significant Accounting Policies [Line Items]", "terseLabel": "Summary Of Significant Accounting Policies [Line Items]" } } }, "localname": "SummaryOfSignificantAccountingPoliciesLineItems", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_SummaryOfSignificantAccountingPoliciesTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Summary of significant accounting policies.", "label": "Summary Of Significant Accounting Policies [Table]", "terseLabel": "Summary Of Significant Accounting Policies [Table]" } } }, "localname": "SummaryOfSignificantAccountingPoliciesTable", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "sage_TaxCreditsExpirationStartYear": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The year in which tax credits will begin to expire.", "label": "Tax Credits Expiration Start Year", "terseLabel": "Tax credit carry forwards expiration period" } } }, "localname": "TaxCreditsExpirationStartYear", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "gYearItemType" }, "sage_TaxCutsAndJobsActOf2017DecreaseInDeferredTaxAssets": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Tax cuts and jobs act of 2017 decrease in deferred tax assets.", "label": "Tax Cuts And Jobs Act Of2017 Decrease In Deferred Tax Assets", "terseLabel": "Reduction to deferred tax asset" } } }, "localname": "TaxCutsAndJobsActOf2017DecreaseInDeferredTaxAssets", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_ThirdAndFourthClinicalDevelopmentMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Third and fourth clinical development milestones.", "label": "Third And Fourth Clinical Development Milestones [Member]", "terseLabel": "Third and Fourth Clinical Development Milestones [Member]" } } }, "localname": "ThirdAndFourthClinicalDevelopmentMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_ThirdAndFourthRegulatoryMilestonesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Third and fourth regulatory milestones.", "label": "Third And Fourth Regulatory Milestones [Member]", "terseLabel": "Third and Fourth Regulatory Milestones [Member]" } } }, "localname": "ThirdAndFourthRegulatoryMilestonesMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_TreasuryStockPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Treasury stock policy.", "label": "Treasury Stock Policy [Text Block]", "terseLabel": "Treasury Stock" } } }, "localname": "TreasuryStockPolicyTextBlock", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "sage_TwoThousandElevenStockOptionPlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Two thousand eleven stock option plan.", "label": "Two Thousand Eleven Stock Option Plan [Member]", "terseLabel": "2011 Plan [Member]" } } }, "localname": "TwoThousandElevenStockOptionPlanMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_TwoThousandFourteenEmployeeStockPurchasePlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Two thousand fourteen employee stock purchase plan.", "label": "Two Thousand Fourteen Employee Stock Purchase Plan [Member]", "terseLabel": "2014 Employee Stock Purchase Plan [Member]" } } }, "localname": "TwoThousandFourteenEmployeeStockPurchasePlanMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_TwoThousandFourteenStockOptionPlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Two thousand fourteen stock option plan.", "label": "Two Thousand Fourteen Stock Option Plan [Member]", "terseLabel": "2014 Plan [Member]" } } }, "localname": "TwoThousandFourteenStockOptionPlanMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_TwoThousandSixteenStockOptionPlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "2016 Stock Option Plan.", "label": "Two Thousand Sixteen Stock Option Plan [Member]", "terseLabel": "2016 Plan [Member]" } } }, "localname": "TwoThousandSixteenStockOptionPlanMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_UniversityOfCaliforniaLicenseAgreementsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "University of California license agreements.", "label": "University Of California License Agreements [Member]", "terseLabel": "University of California License Agreements [Member]" } } }, "localname": "UniversityOfCaliforniaLicenseAgreementsMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "sage_UpFrontPayment": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Up front payment.", "label": "Up Front Payment", "terseLabel": "Upfront payment" } } }, "localname": "UpFrontPayment", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_UpfrontNonrefundablePayment": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Upfront nonrefundable payment.", "label": "Upfront Nonrefundable Payment", "terseLabel": "Upfront non-refundable payment" } } }, "localname": "UpfrontNonrefundablePayment", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "sage_WashingtonUniversityLicenseAgreementMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Washington university license agreement.", "label": "Washington University License Agreement [Member]", "terseLabel": "Washington University License Agreement [Member]" } } }, "localname": "WashingtonUniversityLicenseAgreementMember", "nsuri": "http://www.sagerx.com/20191231", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "srt_MaximumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Maximum [Member]", "terseLabel": "Maximum [Member]" } } }, "localname": "MaximumMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "srt_MinimumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Minimum [Member]", "terseLabel": "Minimum [Member]" } } }, "localname": "MinimumMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "srt_ProductOrServiceAxis": { "auth_ref": [ "r116", "r168", "r169", "r313", "r314" ], "lang": { "en-US": { "role": { "label": "Product Or Service [Axis]", "terseLabel": "Product and Service" } } }, "localname": "ProductOrServiceAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "stringItemType" }, "srt_ProductsAndServicesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Products And Services [Domain]", "terseLabel": "Product and Service" } } }, "localname": "ProductsAndServicesDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "domainItemType" }, "srt_RangeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Range [Axis]", "terseLabel": "Statistical Measurement" } } }, "localname": "RangeAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "srt_RangeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Range [Member]", "terseLabel": "Statistical Measurement" } } }, "localname": "RangeMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "srt_ScenarioUnspecifiedDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Scenario Unspecified [Domain]", "terseLabel": "Scenario" } } }, "localname": "ScenarioUnspecifiedDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "srt_StatementScenarioAxis": { "auth_ref": [ "r158", "r288" ], "lang": { "en-US": { "role": { "label": "Statement Scenario [Axis]", "terseLabel": "Scenario" } } }, "localname": "StatementScenarioAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "srt_TitleOfIndividualAxis": { "auth_ref": [ "r117", "r287" ], "lang": { "en-US": { "role": { "label": "Title Of Individual [Axis]", "terseLabel": "Title of Individual" } } }, "localname": "TitleOfIndividualAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "srt_TitleOfIndividualWithRelationshipToEntityDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Title Of Individual With Relationship To Entity [Domain]", "terseLabel": "Title of Individual" } } }, "localname": "TitleOfIndividualWithRelationshipToEntityDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_AccountingPoliciesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Accounting Policies [Abstract]" } } }, "localname": "AccountingPoliciesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccountingStandardsUpdate201602Member": { "auth_ref": [ "r269" ], "lang": { "en-US": { "role": { "documentation": "Accounting Standards Update 2016-02 Leases (Topic 842).", "label": "Accounting Standards Update201602 [Member]", "terseLabel": "ASU Topic (842) [Member]", "verboseLabel": "ASC Topic 842 [Member]" } } }, "localname": "AccountingStandardsUpdate201602Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_AccountingStandardsUpdate201618Member": { "auth_ref": [ "r83" ], "lang": { "en-US": { "role": { "documentation": "Accounting Standards Update 2016-18 Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force).", "label": "Accounting Standards Update201618 [Member]", "terseLabel": "Accounting Standards Update 2016-18 [Member]" } } }, "localname": "AccountingStandardsUpdate201618Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_AccountsPayableCurrent": { "auth_ref": [ "r29" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10130.0, "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" } } }, "localname": "AccountsPayableCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccruedLiabilitiesCurrent": { "auth_ref": [ "r33" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10140.0, "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccruedLiabilitiesCurrentAndNoncurrent": { "auth_ref": [ "r298", "r311" ], "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.", "label": "Accrued Liabilities Current And Noncurrent", "terseLabel": "Accrued expenses" } } }, "localname": "AccruedLiabilitiesCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccruedProfessionalFeesCurrent": { "auth_ref": [ "r6", "r7", "r33" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail": { "order": 10030.0, "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": "Professional services" } } }, "localname": "AccruedProfessionalFeesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": { "auth_ref": [ "r27", "r152" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail": { "order": 10020.0, "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" } } }, "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r46", "r47", "r48" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10090.0, "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 gain (loss)" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [ "r45", "r48", "r49", "r254" ], "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": "Accumulated Other Comprehensive Income [Member]", "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Member]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdditionalPaidInCapitalCommonStock": { "auth_ref": [ "r17" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10070.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.", "label": "Additional Paid In Capital Common Stock", "terseLabel": "Additional paid-in capital" } } }, "localname": "AdditionalPaidInCapitalCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdditionalPaidInCapitalMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.", "label": "Additional Paid In Capital [Member]", "terseLabel": "Additional Paid-in Capital [Member]" } } }, "localname": "AdditionalPaidInCapitalMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": { "auth_ref": [ "r90" ], "lang": { "en-US": { "role": { "documentation": "Information by new accounting pronouncement.", "label": "Adjustments For New Accounting Pronouncements [Axis]", "terseLabel": "Adjustments for New Accounting Pronouncements" } } }, "localname": "AdjustmentsForNewAccountingPronouncementsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Adjustments Noncash Items 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": "AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": { "auth_ref": [ "r178", "r180", "r214", "r215" ], "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": "Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value", "terseLabel": "Stock-based compensation expense" } } }, "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_AllocatedShareBasedCompensationExpense": { "auth_ref": [ "r180", "r208", "r213" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.", "label": "Allocated Share Based Compensation Expense", "terseLabel": "Total Stock-based compensation expense", "verboseLabel": "Stock-based compensation expense" } } }, "localname": "AllocatedShareBasedCompensationExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseRecognizedDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": { "auth_ref": [ "r96" ], "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": "Anti-dilutive common stock equivalents" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis": { "auth_ref": [ "r96" ], "lang": { "en-US": { "role": { "documentation": "Information by type of antidilutive security.", "label": "Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis]", "terseLabel": "Antidilutive Securities" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail" ], "xbrltype": "stringItemType" }, "us-gaap_AntidilutiveSecuritiesNameDomain": { "auth_ref": [ "r96" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ArrangementsAndNonarrangementTransactionsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.", "label": "Arrangements And Nonarrangement Transactions [Member]", "terseLabel": "Collaborative Arrangement and Arrangement Other than Collaborative" } } }, "localname": "ArrangementsAndNonarrangementTransactionsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_AssetImpairmentCharges": { "auth_ref": [ "r75", "r149" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.", "label": "Asset Impairment Charges", "terseLabel": "Impairment of assets" } } }, "localname": "AssetImpairmentCharges", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_Assets": { "auth_ref": [ "r113", "r295", "r306" ], "calculation": { "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsCurrent": { "auth_ref": [ "r3", "r4", "r41" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10160.0, "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsFairValueDisclosure": { "auth_ref": [ "r258" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets Fair Value Disclosure", "totalLabel": "Total cash equivalents and marketable securities" } } }, "localname": "AssetsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax": { "auth_ref": [ "r128" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail": { "order": 10010.0, "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": "Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax", "terseLabel": "Gross Unrealized Gains" } } }, "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax": { "auth_ref": [ "r129" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail": { "order": 10020.0, "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": "Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax", "negatedLabel": "Gross Unrealized Losses" } } }, "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis": { "auth_ref": [ "r127", "r137" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail": { "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": "Available For Sale Debt Securities Amortized Cost Basis", "totalLabel": "Amortized Cost" } } }, "localname": "AvailableForSaleDebtSecuritiesAmortizedCostBasis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent": { "auth_ref": [ "r126", "r137" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail": { "order": 10030.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "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": "Available For Sale Securities Debt Securities Current", "terseLabel": "Fair Value" } } }, "localname": "AvailableForSaleSecuritiesDebtSecuritiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AwardTypeAxis": { "auth_ref": [ "r181", "r210" ], "lang": { "en-US": { "role": { "documentation": "Information by type of award under share-based payment arrangement.", "label": "Award Type [Axis]", "terseLabel": "Award Type" } } }, "localname": "AwardTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail" ], "xbrltype": "stringItemType" }, "us-gaap_BalanceSheetRelatedDisclosuresAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Balance Sheet Related Disclosures [Abstract]" } } }, "localname": "BalanceSheetRelatedDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_BasisOfAccountingPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).", "label": "Basis Of Accounting Policy Policy [Text Block]", "terseLabel": "Basis of Presentation" } } }, "localname": "BasisOfAccountingPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CapitalExpendituresIncurredButNotYetPaid": { "auth_ref": [ "r79", "r80", "r81" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Future cash outflow to pay for purchases of fixed assets that have occurred.", "label": "Capital Expenditures Incurred But Not Yet Paid", "terseLabel": "Purchases of property and equipment included in accounts payable" } } }, "localname": "CapitalExpendituresIncurredButNotYetPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsAtCarryingValue": { "auth_ref": [ "r1", "r24", "r77" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10210.0, "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", "terseLabel": "Cash and cash equivalents" } } }, "localname": "CashAndCashEquivalentsAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by type of cash and cash equivalent balance.", "label": "Cash And Cash Equivalents [Axis]", "terseLabel": "Cash and Cash Equivalents" } } }, "localname": "CashAndCashEquivalentsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_CashAndCashEquivalentsFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail": { "order": 10010.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash And Cash Equivalents Fair Value Disclosure", "terseLabel": "Total cash equivalents" } } }, "localname": "CashAndCashEquivalentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsPolicyTextBlock": { "auth_ref": [ "r10", "r78", "r85" ], "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 [Text Block]", "terseLabel": "Cash and Cash Equivalents" } } }, "localname": "CashAndCashEquivalentsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy": { "auth_ref": [ "r10", "r78", "r85", "r294" ], "lang": { "en-US": { "role": { "documentation": "Entity's cash and cash equivalents accounting policy with respect to restricted balances. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.", "label": "Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy", "terseLabel": "Restricted Cash" } } }, "localname": "CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations": { "auth_ref": [ "r72", "r77", "r82" ], "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, cash equivalents and restricted cash at end of period", "periodStartLabel": "Cash, cash equivalents and restricted cash at beginning of period" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect": { "auth_ref": [ "r72", "r264" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding 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 Excluding Exchange Rate Effect", "terseLabel": "Cash and cash equivalents increased by amount due to inclusion of restricted cash" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": { "auth_ref": [ "r72", "r264" ], "calculation": { "http://www.sagerx.com/20191231/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 increase (decrease) in cash, cash equivalents and restricted cash" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashEquivalentsMember": { "auth_ref": [ "r10" ], "lang": { "en-US": { "role": { "documentation": "Short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash Equivalents [Member]", "terseLabel": "Cash Equivalents [Member]" } } }, "localname": "CashEquivalentsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ClassOfStockDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share of stock differentiated by the voting rights the holder receives. Examples include, but are not limited to, common stock, redeemable preferred stock, nonredeemable preferred stock, and convertible stock.", "label": "Class Of Stock [Domain]", "terseLabel": "Class of Stock" } } }, "localname": "ClassOfStockDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_CollaborativeArrangementDisclosureTextBlock": { "auth_ref": [ "r247", "r248", "r250" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for collaborative arrangements in which the entity is a participant, including a) information about the nature and purpose of such arrangements; b) its rights and obligations thereunder; c) the accounting policy for collaborative arrangements; and d) the income statement classification and amounts attributable to transactions arising from the collaborative arrangement between participants.", "label": "Collaborative Arrangement Disclosure [Text Block]", "terseLabel": "Collaborative Agreement" } } }, "localname": "CollaborativeArrangementDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreement" ], "xbrltype": "textBlockItemType" }, "us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]", "terseLabel": "Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]" } } }, "localname": "CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_CommercialPaperMember": { "auth_ref": [ "r160" ], "lang": { "en-US": { "role": { "documentation": "Unsecured promissory note (generally negotiable) that provides institutions with short-term funds.", "label": "Commercial Paper [Member]", "terseLabel": "U.S. Commercial Paper [Member]" } } }, "localname": "CommercialPaperMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_CommitmentsAndContingencies": { "auth_ref": [ "r36", "r157", "r299", "r310" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10020.0, "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 5)" } } }, "localname": "CommitmentsAndContingencies", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": { "auth_ref": [ "r156", "r159" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingencies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommonStockMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Stock that is subordinate to all other stock of the issuer.", "label": "Common Stock [Member]", "terseLabel": "Common Stock [Member]" } } }, "localname": "CommonStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockParOrStatedValuePerShare": { "auth_ref": [ "r16" ], "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" } } }, "localname": "CommonStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStockAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockSharesAuthorized": { "auth_ref": [ "r16" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStockAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesIssued": { "auth_ref": [ "r16" ], "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" } } }, "localname": "CommonStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesOutstanding": { "auth_ref": [ "r16", "r161" ], "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", "terseLabel": "Common stock, shares outstanding" } } }, "localname": "CommonStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockValue": { "auth_ref": [ "r16" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10050.0, "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", "terseLabel": "Common stock, $0.0001 par value per share; 120,000,000 shares authorized at December 31, 2019 and December 31, 2018; 51,880,227 and 46,891,296 shares issued at December 31, 2019 and December 31, 2018; 51,877,194 and 46,888,263 shares outstanding at December 31, 2019 and December 31, 2018" } } }, "localname": "CommonStockValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommonStockVotingRights": { "auth_ref": [ "r162" ], "lang": { "en-US": { "role": { "documentation": "Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights.", "label": "Common Stock Voting Rights", "terseLabel": "Voting rights" } } }, "localname": "CommonStockVotingRights", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStockAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock": { "auth_ref": [ "r172", "r173", "r177" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure of an entity's employee compensation and benefit plans, excluding share-based compensation and including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, life insurance, severance, health care, unemployment and other benefit plans.", "label": "Compensation And Employee Benefit Plans Other Than Share Based Compensation [Text Block]", "terseLabel": "Employee Benefit Plan" } } }, "localname": "CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlan" ], "xbrltype": "textBlockItemType" }, "us-gaap_CompensationRelatedCostsPolicyTextBlock": { "auth_ref": [ "r84", "r186" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for salaries, bonuses, incentive awards, postretirement and postemployment benefits granted to employees, including equity-based arrangements; discloses methodologies for measurement, and the bases for recognizing related assets and liabilities and recognizing and reporting compensation expense.", "label": "Compensation Related Costs Policy [Text Block]", "terseLabel": "Stock-Based Compensation" } } }, "localname": "CompensationRelatedCostsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ComprehensiveIncomeNetOfTax": { "auth_ref": [ "r52", "r54", "r55" ], "calculation": { "http://www.sagerx.com/20191231/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 Net Of Tax", "totalLabel": "Total comprehensive loss" } } }, "localname": "ComprehensiveIncomeNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNetOfTaxAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Comprehensive Income Net Of Tax [Abstract]", "terseLabel": "Comprehensive loss:" } } }, "localname": "ComprehensiveIncomeNetOfTaxAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "stringItemType" }, "us-gaap_ComprehensiveIncomePolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for comprehensive income.", "label": "Comprehensive Income Policy Policy [Text Block]", "terseLabel": "Comprehensive Loss" } } }, "localname": "ComprehensiveIncomePolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConcentrationRiskCreditRisk": { "auth_ref": [ "r105", "r305" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for credit risk.", "label": "Concentration Risk Credit Risk", "terseLabel": "Concentration of Credit Risk and of Significant Suppliers" } } }, "localname": "ConcentrationRiskCreditRisk", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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]", "terseLabel": "U.S. Corporate Bonds [Member]" } } }, "localname": "CorporateBondSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_CostOfSalesPolicyTextBlock": { "auth_ref": [ "r171" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for cost of product sold and service rendered.", "label": "Cost Of Sales Policy [Text Block]", "terseLabel": "Cost of Goods Sold" } } }, "localname": "CostOfSalesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CurrentIncomeTaxExpenseBenefit": { "auth_ref": [ "r87", "r241", "r244" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.", "label": "Current Income Tax Expense Benefit", "terseLabel": "Current tax expense" } } }, "localname": "CurrentIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock": { "auth_ref": [ "r136" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure 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 Table [Text Block]", "terseLabel": "Summary of Gross Unrealized Gains and Losses of Marketable Securities" } } }, "localname": "DebtSecuritiesAvailableForSaleTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_DeferredIncomeTaxExpenseBenefit": { "auth_ref": [ "r75", "r87", "r242", "r244" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Deferred Income Tax Expense Benefit", "terseLabel": "Deferred tax expense" } } }, "localname": "DeferredIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsGross": { "auth_ref": [ "r233" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10010.0, "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": "Total net deferred tax asset before valuation allowance" } } }, "localname": "DeferredTaxAssetsGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsNet": { "auth_ref": [ "r234" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "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", "totalLabel": "Net deferred tax asset" } } }, "localname": "DeferredTaxAssetsNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOperatingLossCarryforwards": { "auth_ref": [ "r220", "r239", "r240" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10030.0, "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 losses" } } }, "localname": "DeferredTaxAssetsOperatingLossCarryforwards", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic": { "auth_ref": [ "r220", "r239", "r240" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.", "label": "Deferred Tax Assets Operating Loss Carryforwards Domestic", "terseLabel": "Federal operating loss carryforwards" } } }, "localname": "DeferredTaxAssetsOperatingLossCarryforwardsDomestic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal": { "auth_ref": [ "r220", "r239", "r240" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.", "label": "Deferred Tax Assets Operating Loss Carryforwards State And Local", "terseLabel": "State operating loss carryforwards" } } }, "localname": "DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOther": { "auth_ref": [ "r221", "r239", "r240" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10110.0, "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10070.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment.", "label": "Deferred Tax Assets Property Plant And Equipment", "terseLabel": "Depreciation and amortization" } } }, "localname": "DeferredTaxAssetsPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxCreditCarryforwards": { "auth_ref": [ "r238", "r239", "r240" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10050.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.", "label": "Deferred Tax Assets Tax Credit Carryforwards", "terseLabel": "Tax credit carryforwards" } } }, "localname": "DeferredTaxAssetsTaxCreditCarryforwards", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch": { "auth_ref": [ "r238", "r239", "r240" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards.", "label": "Deferred Tax Assets Tax Credit Carryforwards Research", "terseLabel": "Research and development tax credits carryforwards" } } }, "localname": "DeferredTaxAssetsTaxCreditCarryforwardsResearch", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities": { "auth_ref": [ "r220", "r239", "r240" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10060.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.", "label": "Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities", "terseLabel": "Accrued expenses" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsValuationAllowance": { "auth_ref": [ "r235" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10020.0, "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": "Valuation allowance", "terseLabel": "Valuation allowance" } } }, "localname": "DeferredTaxAssetsValuationAllowance", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesLeasingArrangements": { "auth_ref": [ "r221", "r239", "r240" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail": { "order": 10100.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.", "label": "Deferred Tax Liabilities Leasing Arrangements", "terseLabel": "Right of use liability" } } }, "localname": "DeferredTaxLiabilitiesLeasingArrangements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfSignificantComponentsOfCompanySNetDeferredTaxAssetDetail" ], "xbrltype": "monetaryItemType" }, "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": "Employer contribution" } } }, "localname": "DefinedContributionPlanEmployerDiscretionaryContributionAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlanAdditionalInformationDetail" ], "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": "Employer matching contribution, percent of match" } } }, "localname": "DefinedContributionPlanEmployerMatchingContributionPercentOfMatch", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlanAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.", "label": "Defined Contribution Plan Maximum Annual Contributions Per Employee Percent", "terseLabel": "Maximum annual contributions per employee, percent" } } }, "localname": "DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlanAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedContributionPlanSponsorLocationExtensibleList": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indicates location of employer sponsoring defined contribution plan designed to provide retirement benefits.", "label": "Defined Contribution Plan Sponsor Location Extensible List", "terseLabel": "Defined Contribution Plan, Sponsor Location [Extensible List]" } } }, "localname": "DefinedContributionPlanSponsorLocationExtensibleList", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlanAdditionalInformationDetail" ], "xbrltype": "extensibleListItemType" }, "us-gaap_DefinedContributionPlanTaxStatusExtensibleList": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indicates tax status of defined contribution plan designed to provide retirement benefits.", "label": "Defined Contribution Plan Tax Status Extensible List", "terseLabel": "Defined Contribution Plan, Tax Status [Extensible List]" } } }, "localname": "DefinedContributionPlanTaxStatusExtensibleList", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlanAdditionalInformationDetail" ], "xbrltype": "extensibleListItemType" }, "us-gaap_Depreciation": { "auth_ref": [ "r75", "r150" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10150.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.", "label": "Depreciation", "terseLabel": "Depreciation", "verboseLabel": "Depreciation expense" } } }, "localname": "Depreciation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock": { "auth_ref": [ "r216" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for share-based payment arrangement.", "label": "Disclosure Of Compensation Related Costs Share Based Payments [Text Block]", "terseLabel": "Stock-Based Compensation" } } }, "localname": "DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensation" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]" } } }, "localname": "DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_DividendsCommonStock": { "auth_ref": [ "r163", "r304" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).", "label": "Dividends Common Stock", "terseLabel": "Dividends declared" } } }, "localname": "DividendsCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStockAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "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 Country [Member]", "terseLabel": "Domestic Tax Authority [Member]" } } }, "localname": "DomesticCountryMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_EarningsPerShareAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Earnings Per Share [Abstract]" } } }, "localname": "EarningsPerShareAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareBasicAndDiluted": { "auth_ref": [ "r94" ], "lang": { "en-US": { "role": { "documentation": "The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.", "label": "Earnings Per Share Basic And Diluted", "terseLabel": "Net loss per share\u2014basic and diluted", "verboseLabel": "Net loss per share\u2014basic and diluted" } } }, "localname": "EarningsPerShareBasicAndDiluted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedSummaryOfQuarterlyFinancialInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerSharePolicyTextBlock": { "auth_ref": [ "r85", "r96", "r97", "r98" ], "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 [Text Block]", "terseLabel": "Basic and Diluted Net Loss Per Share" } } }, "localname": "EarningsPerSharePolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_EarningsPerShareTextBlock": { "auth_ref": [ "r99" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for earnings per share.", "label": "Earnings Per Share [Text Block]", "terseLabel": "Net Loss Per Share" } } }, "localname": "EarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShare" ], "xbrltype": "textBlockItemType" }, "us-gaap_EffectiveIncomeTaxRateContinuingOperations": { "auth_ref": [ "r88", "r226", "r227" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "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 Continuing Operations", "totalLabel": "Total effective tax rate" } } }, "localname": "EffectiveIncomeTaxRateContinuingOperations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10010.0, "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", "terseLabel": "Tax due at statutory rate", "verboseLabel": "U.S. corporate tax rate" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10060.0, "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", "terseLabel": "Change in valuation allowance" } } }, "localname": "EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10080.0, "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 income tax rates.", "label": "Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate", "terseLabel": "Federal and state rate change" } } }, "localname": "EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10090.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": -1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of 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 deduction for Medicare prescription drug benefit subsidy.", "label": "Effective Income Tax Rate Reconciliation Deductions Medicare Prescription Drug Benefit", "negatedLabel": "Research and orphan drug credit addback" } } }, "localname": "EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10040.0, "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", "terseLabel": "Foreign rate differential" } } }, "localname": "EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10030.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.", "label": "Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost", "terseLabel": "Stock-based compensation" } } }, "localname": "EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10070.0, "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", "terseLabel": "Other" } } }, "localname": "EffectiveIncomeTaxRateReconciliationOtherAdjustments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10020.0, "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 state and local income tax expense (benefit), net of federal tax expense (benefit).", "label": "Effective Income Tax Rate Reconciliation State And Local Income Taxes", "negatedLabel": "State taxes, net of federal" } } }, "localname": "EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits": { "auth_ref": [ "r226", "r227", "r243" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail": { "order": 10050.0, "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 tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.", "label": "Effective Income Tax Rate Reconciliation Tax Credits", "negatedLabel": "Federal and state credits" } } }, "localname": "EffectiveIncomeTaxRateReconciliationTaxCredits", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationOfUSStatutoryRateToCompanySEffectiveTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EmployeeRelatedLiabilitiesCurrent": { "auth_ref": [ "r33" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail": { "order": 10020.0, "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": "Employee-related expenses" } } }, "localname": "EmployeeRelatedLiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized": { "auth_ref": [ "r209" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost not yet recognized for nonvested award under share-based payment arrangement.", "label": "Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized", "terseLabel": "Total unrecognized stock-based compensation expense" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1": { "auth_ref": [ "r209" ], "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": "Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1", "terseLabel": "Weighted average period of unrecognized compensation costs" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "us-gaap_EmployeeStockOptionMember": { "auth_ref": [ "r206" ], "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": "Employee Stock Option [Member]", "terseLabel": "Stock Options [Member]", "verboseLabel": "Stock Options [Member]" } } }, "localname": "EmployeeStockOptionMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail" ], "xbrltype": "domainItemType" }, "us-gaap_EquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Equity [Abstract]" } } }, "localname": "EquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_EquityComponentDomain": { "auth_ref": [ "r161" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": { "auth_ref": [ "r258", "r259", "r260", "r262" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]", "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock": { "auth_ref": [ "r258", "r259", "r260", "r261", "r262" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Table [Text Block]", "terseLabel": "Summary of Company's Money Market Funds and Marketable Securities" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueByFairValueHierarchyLevelAxis": { "auth_ref": [ "r174", "r175", "r176", "r259", "r289" ], "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 By Fair Value Hierarchy Level [Axis]", "terseLabel": "Fair Value Hierarchy and NAV" } } }, "localname": "FairValueByFairValueHierarchyLevelAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Fair Value Disclosures [Abstract]" } } }, "localname": "FairValueDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_FairValueInputsLevel1Member": { "auth_ref": [ "r174", "r175", "r176", "r259", "r290" ], "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 Level1 [Member]", "terseLabel": "Fair Value, Inputs, Level 1 [Member]" } } }, "localname": "FairValueInputsLevel1Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel2Member": { "auth_ref": [ "r174", "r175", "r176", "r259", "r291" ], "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 Level2 [Member]", "terseLabel": "Fair Value, Inputs, Level 2 [Member]" } } }, "localname": "FairValueInputsLevel2Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel3Member": { "auth_ref": [ "r174", "r175", "r176", "r259", "r292" ], "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 Level3 [Member]", "terseLabel": "Fair Value, Inputs, Level 3 [Member]" } } }, "localname": "FairValueInputsLevel3Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementInputsDisclosureTextBlock": { "auth_ref": [ "r263" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis.", "label": "Fair Value Measurement Inputs Disclosure [Text Block]", "terseLabel": "Fair Value Measurements" } } }, "localname": "FairValueMeasurementInputsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurements" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueMeasurementPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for fair value measurements of financial and non-financial assets, liabilities and instruments classified in shareholders' equity. Disclosures include, but are not limited to, how an entity that manages a group of financial assets and liabilities on the basis of its net exposure measures the fair value of those assets and liabilities.", "label": "Fair Value Measurement Policy Policy [Text Block]", "terseLabel": "Fair Value Measurements" } } }, "localname": "FairValueMeasurementPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.", "label": "Fair Value Measurements Fair Value Hierarchy [Domain]", "terseLabel": "Fair Value Hierarchy and NAV" } } }, "localname": "FairValueMeasurementsFairValueHierarchyDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": { "auth_ref": [ "r142", "r143", "r146", "r147", "r293" ], "lang": { "en-US": { "role": { "documentation": "Information by major type or class of finite-lived intangible assets.", "label": "Finite Lived Intangible Assets By Major Class [Axis]", "terseLabel": "Finite-Lived Intangible Assets by Major Class" } } }, "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": { "auth_ref": [ "r142", "r145" ], "lang": { "en-US": { "role": { "documentation": "The major class of finite-lived intangible asset (for example, patents, trademarks, copyrights, etc.) A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.", "label": "Finite Lived Intangible Assets Major Class Name [Domain]", "terseLabel": "Finite-Lived Intangible Assets, Major Class Name" } } }, "localname": "FiniteLivedIntangibleAssetsMajorClassNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "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]", "terseLabel": "Furniture and Equipment [Member]" } } }, "localname": "FurnitureAndFixturesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "xbrltype": "domainItemType" }, "us-gaap_IPOMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "First sale of stock by a private company to the public.", "label": "I P O [Member]", "verboseLabel": "Initial Public Offering [Member]" } } }, "localname": "IPOMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock": { "auth_ref": [ "r85", "r148", "r155" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for recognizing and measuring the impairment of long-lived assets. An entity also may disclose its accounting policy for long-lived assets to be sold. This policy excludes goodwill and intangible assets.", "label": "Impairment Or Disposal Of Long Lived Assets Policy [Text Block]", "terseLabel": "Impairment of Long-Lived Assets" } } }, "localname": "ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeStatementAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Statement [Abstract]" } } }, "localname": "IncomeStatementAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeStatementLocationAxis": { "auth_ref": [ "r154" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseRecognizedDetail" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeStatementLocationDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Location in the income statement.", "label": "Income Statement Location [Domain]", "terseLabel": "Income Statement Location" } } }, "localname": "IncomeStatementLocationDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseRecognizedDetail" ], "xbrltype": "domainItemType" }, "us-gaap_IncomeTaxAuthorityAxis": { "auth_ref": [ "r229" ], "lang": { "en-US": { "role": { "documentation": "Information by tax jurisdiction.", "label": "Income Tax Authority [Axis]", "terseLabel": "Income Tax Authority" } } }, "localname": "IncomeTaxAuthorityAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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]", "terseLabel": "Income Tax Authority" } } }, "localname": "IncomeTaxAuthorityDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureTextBlock": { "auth_ref": [ "r246" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxes" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued": { "auth_ref": [ "r228" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.", "label": "Income Tax Examination Penalties And Interest Accrued", "terseLabel": "Accrued interest or penalties related to uncertain tax positions" } } }, "localname": "IncomeTaxExaminationPenaltiesAndInterestAccrued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxPolicyTextBlock": { "auth_ref": [ "r56", "r85", "r224", "r225", "r231", "r232", "r237", "r245", "r320" ], "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 [Text Block]", "terseLabel": "Income Taxes" } } }, "localname": "IncomeTaxPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncreaseDecreaseInAccountsPayable": { "auth_ref": [ "r74" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10210.0, "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" } } }, "localname": "IncreaseDecreaseInAccountsPayable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities": { "auth_ref": [ "r74" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10220.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in accrued expenses, and obligations classified as other.", "label": "Increase Decrease In Accrued Liabilities And Other Operating Liabilities", "terseLabel": "Accrued expenses and other liabilities" } } }, "localname": "IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_IncreaseDecreaseInOtherNoncurrentAssets": { "auth_ref": [ "r74" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10170.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in noncurrent assets classified as other.", "label": "Increase Decrease In Other Noncurrent Assets", "negatedLabel": "Other long-term assets" } } }, "localname": "IncreaseDecreaseInOtherNoncurrentAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets": { "auth_ref": [ "r74" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10160.0, "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 Deferred Expense And Other Assets", "negatedLabel": "Prepaid expenses and other current assets" } } }, "localname": "IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock": { "auth_ref": [ "r93", "r97" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail": { "order": 10020.0, "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible preferred stock using the if-converted method.", "label": "Incremental Common Shares Attributable To Conversion Of Preferred Stock", "terseLabel": "Dilutive effect of shares of common stock equivalents resulting from common stock options and restricted stock units" } } }, "localname": "IncrementalCommonSharesAttributableToConversionOfPreferredStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_IntangibleAssetsFiniteLivedPolicy": { "auth_ref": [ "r85", "r145" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for finite-lived intangible assets. This accounting policy also might address: (1) the amortization method used; (2) the useful lives of such assets; and (3) how the entity assesses and measures impairment of such assets.", "label": "Intangible Assets Finite Lived Policy", "terseLabel": "Intangible Assets" } } }, "localname": "IntangibleAssetsFiniteLivedPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IntangibleAssetsNetExcludingGoodwill": { "auth_ref": [ "r141", "r144" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.", "label": "Intangible Assets Net Excluding Goodwill", "terseLabel": "Intangible assets" } } }, "localname": "IntangibleAssetsNetExcludingGoodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestIncomeExpenseNonoperatingNet": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10050.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The net amount of nonoperating interest income (expense).", "label": "Interest Income Expense Nonoperating Net", "terseLabel": "Interest income, net" } } }, "localname": "InterestIncomeExpenseNonoperatingNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_InventoryPolicyTextBlock": { "auth_ref": [ "r9", "r40", "r85", "r100", "r139", "r140" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of inventory accounting policy for inventory classes, including, but not limited to, basis for determining inventory amounts, methods by which amounts are added and removed from inventory classes, loss recognition on impairment of inventories, and situations in which inventories are stated above cost.", "label": "Inventory Policy [Text Block]", "terseLabel": "Inventory" } } }, "localname": "InventoryPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_InvestmentIncomeNetAmortizationOfDiscountAndPremium": { "auth_ref": [ "r61" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10140.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of accretion (amortization) of purchase discount (premium) on nonoperating securities.", "label": "Investment Income Net Amortization Of Discount And Premium", "negatedLabel": "Amortization of discount on marketable securities" } } }, "localname": "InvestmentIncomeNetAmortizationOfDiscountAndPremium", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentTypeAxis": { "auth_ref": [ "r315", "r316", "r317", "r318" ], "lang": { "en-US": { "role": { "documentation": "Information by type of investments.", "label": "Investment Type [Axis]", "terseLabel": "Investment Type" } } }, "localname": "InvestmentTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_InvestmentTypeCategorizationMember": { "auth_ref": [ "r315", "r316", "r317", "r318" ], "lang": { "en-US": { "role": { "documentation": "Asset obtained to generate income or appreciate in value.", "label": "Investment Type Categorization [Member]", "terseLabel": "Investments" } } }, "localname": "InvestmentTypeCategorizationMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_InvestmentsFairValueDisclosure": { "auth_ref": [ "r258" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail": { "order": 10020.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.", "label": "Investments Fair Value Disclosure", "verboseLabel": "Total marketable securities" } } }, "localname": "InvestmentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeaseArrangementTypeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by group of related lease arrangements. For example, but not limited to, leases grouped by facility or contractual terms.", "label": "Lease Arrangement Type [Axis]", "terseLabel": "Lease Arrangement, Type" } } }, "localname": "LeaseArrangementTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_LeaseArrangementTypeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Group of related lease arrangements. For example, but not limited to, leases grouped by facility or contractual terms.", "label": "Lease Arrangement Type [Domain]", "terseLabel": "Lease Arrangement, Type" } } }, "localname": "LeaseArrangementTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_LeaseCost": { "auth_ref": [ "r283", "r285" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail": { "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" } } }, "localname": "LeaseCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeaseCostTableTextBlock": { "auth_ref": [ "r283" ], "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": "Schedule of Lease Costs Recorded in Consolidated Statements of Operations and Comprehensive Loss" } } }, "localname": "LeaseCostTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LeaseExpirationDate1": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Date which lease or group of leases is set to expire, in CCYY-MM-DD format.", "label": "Lease Expiration Date1", "terseLabel": "Lease expire date" } } }, "localname": "LeaseExpirationDate1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "dateItemType" }, "us-gaap_LeaseholdImprovementsMember": { "auth_ref": [ "r151" ], "lang": { "en-US": { "role": { "documentation": "Additions or improvements to assets held under a lease arrangement.", "label": "Leasehold Improvements [Member]", "terseLabel": "Leasehold Improvements [Member]" } } }, "localname": "LeaseholdImprovementsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "xbrltype": "domainItemType" }, "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_LesseeLeaseDescriptionTable": { "auth_ref": [ "r275" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_LesseeLeasesPolicyTextBlock": { "auth_ref": [ "r273" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for leasing arrangement entered into by lessee.", "label": "Lessee Leases Policy [Text Block]", "terseLabel": "Leases" } } }, "localname": "LesseeLeasesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": { "auth_ref": [ "r284" ], "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": "Schedule of Minimum Lease Payments" } } }, "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": { "auth_ref": [ "r284" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail2": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease.", "label": "Lessee Operating Lease Liability Payments Due", "totalLabel": "Total lease payments" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": { "auth_ref": [ "r284" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail": { "order": 10060.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due After Year Five", "terseLabel": "Thereafter" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": { "auth_ref": [ "r284" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail": { "order": 10010.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Next Twelve Months", "terseLabel": "2020" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": { "auth_ref": [ "r284" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail": { "order": 10050.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Year Five", "terseLabel": "2024" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": { "auth_ref": [ "r284" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail": { "order": 10040.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Year Four", "terseLabel": "2023" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": { "auth_ref": [ "r284" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail": { "order": 10030.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Year Three", "terseLabel": "2022" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": { "auth_ref": [ "r284" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail": { "order": 10020.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Year Two", "terseLabel": "2021" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": { "auth_ref": [ "r284" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail2": { "order": 10010.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.", "label": "Lessee Operating Lease Liability Undiscounted Excess Amount", "negatedLabel": "Less imputed interest" } } }, "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseTermOfContract": { "auth_ref": [ "r274" ], "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, operating lease contract term" } } }, "localname": "LesseeOperatingLeaseTermOfContract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "us-gaap_LessorOperatingLeaseOptionToExtend": { "auth_ref": [ "r286" ], "lang": { "en-US": { "role": { "documentation": "Description of terms and conditions of option to extend lessor's operating lease.", "label": "Lessor Operating Lease Option To Extend", "terseLabel": "Operating lease option to extend" } } }, "localname": "LessorOperatingLeaseOptionToExtend", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_LessorOperatingLeaseRenewalTerm": { "auth_ref": [ "r286" ], "lang": { "en-US": { "role": { "documentation": "Term of lessor's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Lessor Operating Lease Renewal Term", "terseLabel": "Operating lease renewal term" } } }, "localname": "LessorOperatingLeaseRenewalTerm", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "us-gaap_Liabilities": { "auth_ref": [ "r31" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10010.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.", "label": "Liabilities", "totalLabel": "Total liabilities" } } }, "localname": "Liabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquity": { "auth_ref": [ "r21", "r296", "r308" ], "calculation": { "http://www.sagerx.com/20191231/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 Stockholders Equity", "totalLabel": "Total liabilities and stockholders\u2019 equity" } } }, "localname": "LiabilitiesAndStockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities And Stockholders Equity [Abstract]", "terseLabel": "Liabilities and Stockholders\u2019 Equity" } } }, "localname": "LiabilitiesAndStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesCurrent": { "auth_ref": [ "r34" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10100.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.", "label": "Liabilities Current", "totalLabel": "Total current liabilities" } } }, "localname": "LiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilityForUncertainTaxPositionsCurrent": { "auth_ref": [ "r33" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount recognized for uncertainty in income taxes classified as current.", "label": "Liability For Uncertain Tax Positions Current", "terseLabel": "Uncertain tax positions" } } }, "localname": "LiabilityForUncertainTaxPositionsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_MarketableSecuritiesCurrent": { "auth_ref": [ "r2", "r32" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10220.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of investment in marketable security, classified as current.", "label": "Marketable Securities Current", "terseLabel": "Marketable securities" } } }, "localname": "MarketableSecuritiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_MarketableSecuritiesPolicy": { "auth_ref": [ "r303" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for investment classified as marketable security.", "label": "Marketable Securities Policy", "terseLabel": "Marketable Securities" } } }, "localname": "MarketableSecuritiesPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivities": { "auth_ref": [ "r72" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10030.0, "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivities": { "auth_ref": [ "r72" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10020.0, "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivities": { "auth_ref": [ "r72", "r73", "r76" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10010.0, "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLoss": { "auth_ref": [ "r50", "r53", "r59", "r76", "r97", "r300", "r312" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10010.0, "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", "terseLabel": "Net loss", "totalLabel": "Net loss" } } }, "localname": "NetIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedSummaryOfQuarterlyFinancialInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Income Loss [Abstract]", "terseLabel": "Numerator:" } } }, "localname": "NetIncomeLossAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Income Loss Available To Common Stockholders Basic [Abstract]", "terseLabel": "Basic net loss per share:" } } }, "localname": "NetIncomeLossAvailableToCommonStockholdersBasicAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail" ], "xbrltype": "stringItemType" }, "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": "Recently Issued Accounting Pronouncements" } } }, "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_NoncashInvestingAndFinancingItemsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Noncash Investing And Financing Items [Abstract]", "terseLabel": "Supplemental disclosure of non-cash operating and investing activities" } } }, "localname": "NoncashInvestingAndFinancingItemsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingCostsAndExpensesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Operating Costs And Expenses [Abstract]", "terseLabel": "Operating costs and expenses:" } } }, "localname": "OperatingCostsAndExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingExpenses": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10080.0, "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", "terseLabel": "Total operating costs and expenses", "totalLabel": "Total operating costs and expenses" } } }, "localname": "OperatingExpenses", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedSummaryOfQuarterlyFinancialInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingIncomeLoss": { "auth_ref": [], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10040.0, "parentTag": "us-gaap_NetIncomeLoss", "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", "terseLabel": "Loss from operations", "totalLabel": "Loss from operations" } } }, "localname": "OperatingIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedSummaryOfQuarterlyFinancialInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseCost": { "auth_ref": [ "r276", "r285" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail": { "order": 10010.0, "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 cost" } } }, "localname": "OperatingLeaseCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiability": { "auth_ref": [ "r271" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail2": { "order": 10020.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.", "label": "Operating Lease Liability", "terseLabel": "Lease liabilities", "totalLabel": "Total operating lease liabilities", "verboseLabel": "Present value of operating lease liabilities" } } }, "localname": "OperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityCurrent": { "auth_ref": [ "r271" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail": { "order": 10010.0, "parentTag": "us-gaap_OperatingLeaseLiability", "weight": 1.0 }, "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10150.0, "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": "Operating lease liability, current portion", "verboseLabel": "Current operating lease liabilities" } } }, "localname": "OperatingLeaseLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityNoncurrent": { "auth_ref": [ "r271" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail": { "order": 10020.0, "parentTag": "us-gaap_OperatingLeaseLiability", "weight": 1.0 }, "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10110.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.", "label": "Operating Lease Liability Noncurrent", "terseLabel": "Operating lease liability, net of current portion", "verboseLabel": "Long-term operating lease liabilities" } } }, "localname": "OperatingLeaseLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasePayments": { "auth_ref": [ "r272", "r279" ], "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 lease liabilities" } } }, "localname": "OperatingLeasePayments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfSupplementalDisclosureOfCashFlowInformationRelatedToOperatingLeasesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseRightOfUseAsset": { "auth_ref": [ "r270" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10190.0, "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 operating asset" } } }, "localname": "OperatingLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfConsolidatedBalanceSheetsOfOperatingLeasesDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": { "auth_ref": [ "r282", "r285" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfWeightedAverageRemainingLeaseTermAndWeightedAverageDiscountRateOfOurOperatingLeasesDetail" ], "xbrltype": "percentItemType" }, "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": { "auth_ref": [ "r281", "r285" ], "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 Term1", "terseLabel": "Weighted average remaining lease term in years" } } }, "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfWeightedAverageRemainingLeaseTermAndWeightedAverageDiscountRateOfOurOperatingLeasesDetail" ], "xbrltype": "durationItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDue": { "auth_ref": [ "r265", "r267" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.", "label": "Operating Leases Future Minimum Payments Due", "totalLabel": "Total Operating leases, future minimum payments" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent": { "auth_ref": [ "r265", "r267" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail": { "order": 10010.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases Future Minimum Payments Due Current", "terseLabel": "2019" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears": { "auth_ref": [ "r265", "r267" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail": { "order": 10050.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases Future Minimum Payments Due In Five Years", "terseLabel": "2023" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFiveYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears": { "auth_ref": [ "r265", "r267" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail": { "order": 10040.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases Future Minimum Payments Due In Four Years", "terseLabel": "2022" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFourYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears": { "auth_ref": [ "r265", "r267" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail": { "order": 10030.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases Future Minimum Payments Due In Three Years", "terseLabel": "2021" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInThreeYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears": { "auth_ref": [ "r265", "r267" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail": { "order": 10020.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases Future Minimum Payments Due In Two Years", "terseLabel": "2020" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInTwoYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter": { "auth_ref": [ "r265", "r267" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail": { "order": 10060.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases Future Minimum Payments Due Thereafter", "terseLabel": "Thereafter" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueThereafter", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesRentExpenseNet": { "auth_ref": [ "r266" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.", "label": "Operating Leases Rent Expense Net", "terseLabel": "Rent expense" } } }, "localname": "OperatingLeasesRentExpenseNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesOperatingLeasesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "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/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock": { "auth_ref": [ "r0", "r257" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.", "label": "Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block]", "terseLabel": "Nature of the Business" } } }, "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusiness" ], "xbrltype": "textBlockItemType" }, "us-gaap_OtherAccruedLiabilitiesCurrent": { "auth_ref": [ "r6", "r7", "r8", "r33" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail": { "order": 10040.0, "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" } } }, "localname": "OtherAccruedLiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfAccruedExpensesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssetsNoncurrent": { "auth_ref": [ "r28" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10200.0, "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 long-term assets" } } }, "localname": "OtherAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax": { "auth_ref": [ "r43", "r44", "r46" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.", "label": "Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax", "terseLabel": "Unrealized gain (loss) on available-for-sale securities" } } }, "localname": "OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r51", "r54", "r57", "r161" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10020.0, "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 gain (loss)" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]", "terseLabel": "Other comprehensive items:" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "stringItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax": { "auth_ref": [ "r43", "r46" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10030.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.", "label": "Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax", "terseLabel": "Unrealized gain (loss) on marketable securities" } } }, "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLiabilitiesNoncurrent": { "auth_ref": [ "r35" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10120.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.", "label": "Other Liabilities Noncurrent", "terseLabel": "Other liabilities" } } }, "localname": "OtherLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpense": { "auth_ref": [ "r62" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10060.0, "parentTag": "us-gaap_NetIncomeLoss", "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 (expense), net" } } }, "localname": "OtherNonoperatingIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_PayablesAndAccrualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Payables And Accruals [Abstract]" } } }, "localname": "PayablesAndAccrualsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_PaymentOfFinancingAndStockIssuanceCosts": { "auth_ref": [ "r70" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10060.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The total of the cash outflow during the period which has been paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt and the cost incurred directly for the issuance of equity securities.", "label": "Payment Of Financing And Stock Issuance Costs", "negatedLabel": "Payments of offering costs" } } }, "localname": "PaymentOfFinancingAndStockIssuanceCosts", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation": { "auth_ref": [ "r69" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10050.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.", "label": "Payments Related To Tax Withholding For Share Based Compensation", "negatedLabel": "Payment of employee tax obligations related to vesting of restricted stock units" } } }, "localname": "PaymentsRelatedToTaxWithholdingForShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt": { "auth_ref": [ "r64", "r66", "r125" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10090.0, "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 Available For Sale Securities Debt", "negatedLabel": "Purchases of marketable securities" } } }, "localname": "PaymentsToAcquireAvailableForSaleSecuritiesDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": { "auth_ref": [ "r67" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10100.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.", "label": "Payments To Acquire Property Plant And Equipment", "negatedLabel": "Purchases of property and equipment" } } }, "localname": "PaymentsToAcquirePropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PerformanceSharesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share-based payment arrangement awarded for meeting performance target.", "label": "Performance Shares [Member]", "terseLabel": "Performance Shares [Member]" } } }, "localname": "PerformanceSharesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_PlanNameAxis": { "auth_ref": [ "r181", "r210" ], "lang": { "en-US": { "role": { "documentation": "Information by plan name for share-based payment arrangement.", "label": "Plan Name [Axis]", "terseLabel": "Plan Name" } } }, "localname": "PlanNameAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_PlanNameDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Plan name for share-based payment arrangement.", "label": "Plan Name [Domain]", "terseLabel": "Plan Name" } } }, "localname": "PlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_PostemploymentBenefitsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Postemployment Benefits [Abstract]" } } }, "localname": "PostemploymentBenefitsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_PreferredStockParOrStatedValuePerShare": { "auth_ref": [ "r15" ], "lang": { "en-US": { "role": { "documentation": "Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.", "label": "Preferred Stock Par Or Stated Value Per Share", "terseLabel": "Preferred stock, par value" } } }, "localname": "PreferredStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_PreferredStockSharesAuthorized": { "auth_ref": [ "r15" ], "lang": { "en-US": { "role": { "documentation": "The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.", "label": "Preferred Stock Shares Authorized", "terseLabel": "Preferred stock, shares authorized" } } }, "localname": "PreferredStockSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosurePreferredStockAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_PreferredStockSharesIssued": { "auth_ref": [ "r15" ], "lang": { "en-US": { "role": { "documentation": "Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.", "label": "Preferred Stock Shares Issued", "terseLabel": "Preferred stock, shares issued" } } }, "localname": "PreferredStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosurePreferredStockAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_PreferredStockSharesOutstanding": { "auth_ref": [ "r15" ], "lang": { "en-US": { "role": { "documentation": "Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.", "label": "Preferred Stock Shares Outstanding", "terseLabel": "Preferred stock, shares outstanding" } } }, "localname": "PreferredStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosurePreferredStockAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_PreferredStockTextBlock": { "auth_ref": [ "r166" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock.", "label": "Preferred Stock [Text Block]", "terseLabel": "Preferred Stock" } } }, "localname": "PreferredStockTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosurePreferredStock" ], "xbrltype": "textBlockItemType" }, "us-gaap_PreferredStockValue": { "auth_ref": [ "r15" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10040.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.", "label": "Preferred Stock Value", "terseLabel": "Preferred stock, $0.0001 par value per share; 5,000,000 shares authorized at December 31, 2019 and December 31, 2018; no shares issued or outstanding at December 31, 2019 and December 31, 2018" } } }, "localname": "PreferredStockValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PrepaidExpenseAndOtherAssetsCurrent": { "auth_ref": [ "r3", "r22", "r23" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10230.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.", "label": "Prepaid Expense And Other Assets Current", "terseLabel": "Prepaid expenses and other current assets" } } }, "localname": "PrepaidExpenseAndOtherAssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceInitialPublicOffering": { "auth_ref": [ "r68" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow associated with the amount received from entity's first offering of stock to the public.", "label": "Proceeds From Issuance Initial Public Offering", "terseLabel": "Proceeds from initial public offering of common stock, net of commissions and underwriting discounts" } } }, "localname": "ProceedsFromIssuanceInitialPublicOffering", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfCommonStock": { "auth_ref": [ "r68" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10070.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from the additional capital contribution to the entity.", "label": "Proceeds From Issuance Of Common Stock", "terseLabel": "Proceeds from public offerings of common stock, net of commissions and underwriting discounts" } } }, "localname": "ProceedsFromIssuanceOfCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions": { "auth_ref": [ "r68", "r211" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10040.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow from issuance of shares under share-based payment arrangement. Includes, but is not limited to, option exercised.", "label": "Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options", "terseLabel": "Proceeds from stock option exercises and employee stock purchase plan issuances" } } }, "localname": "ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities": { "auth_ref": [ "r64", "r65", "r125" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10080.0, "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 Available For Sale Securities", "terseLabel": "Proceeds from sales and maturities of marketable securities" } } }, "localname": "ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProductMember": { "auth_ref": [ "r169" ], "lang": { "en-US": { "role": { "documentation": "Article or substance produced by nature, labor or machinery.", "label": "Product [Member]", "terseLabel": "Product Revenue [Member]" } } }, "localname": "ProductMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "domainItemType" }, "us-gaap_ProfitLoss": { "auth_ref": [ "r50", "r53", "r71", "r113", "r115", "r251", "r252", "r253", "r255", "r256" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10110.0, "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": "Profit Loss", "terseLabel": "Net loss" } } }, "localname": "ProfitLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentByTypeAxis": { "auth_ref": [ "r27", "r153" ], "lang": { "en-US": { "role": { "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.", "label": "Property Plant And Equipment By Type [Axis]", "terseLabel": "Property, Plant and Equipment, Type" } } }, "localname": "PropertyPlantAndEquipmentByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentGross": { "auth_ref": [ "r26", "r151" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail": { "order": 10010.0, "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", "terseLabel": "Property and equipment, gross" } } }, "localname": "PropertyPlantAndEquipmentGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "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]", "terseLabel": "Property, Plant and Equipment [Line Items]" } } }, "localname": "PropertyPlantAndEquipmentLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentNet": { "auth_ref": [ "r11", "r12", "r153", "r309" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10170.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property Plant And Equipment Net", "terseLabel": "Property and equipment, net", "totalLabel": "Property and equipment, net" } } }, "localname": "PropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentPolicyTextBlock": { "auth_ref": [ "r25", "r85", "r153" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, basis of assets, depreciation and depletion methods used, including composite deprecation, estimated useful lives, capitalization policy, accounting treatment for costs incurred for repairs and maintenance, capitalized interest and the method it is calculated, disposals and impairments.", "label": "Property Plant And Equipment Policy [Text Block]", "terseLabel": "Property and Equipment" } } }, "localname": "PropertyPlantAndEquipmentPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTextBlock": { "auth_ref": [ "r11", "r153" ], "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 [Text Block]", "terseLabel": "Summary of Property and Equipment, Net" } } }, "localname": "PropertyPlantAndEquipmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTypeDomain": { "auth_ref": [ "r11", "r151" ], "lang": { "en-US": { "role": { "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.", "label": "Property Plant And Equipment Type [Domain]", "terseLabel": "Property, Plant and Equipment, Type" } } }, "localname": "PropertyPlantAndEquipmentTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "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": "Property and equipment, useful life" } } }, "localname": "PropertyPlantAndEquipmentUsefulLife", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "us-gaap_QuarterlyFinancialInformationDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Quarterly Financial Information Disclosure [Abstract]" } } }, "localname": "QuarterlyFinancialInformationDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_QuarterlyFinancialInformationTextBlock": { "auth_ref": [ "r102" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information.", "label": "Quarterly Financial Information [Text Block]", "terseLabel": "Selected Quarterly Financial Data (Unaudited)" } } }, "localname": "QuarterlyFinancialInformationTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnaudited" ], "xbrltype": "textBlockItemType" }, "us-gaap_RedeemableConvertiblePreferredStockMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Description of type or class of redeemable convertible preferred stock. Convertible redeemable preferred stock possess conversion and redemption features. The stock has redemption features that are outside the control of the issuer.", "label": "Redeemable Convertible Preferred Stock [Member]", "terseLabel": "Redeemable Convertible Preferred Stock [Member]" } } }, "localname": "RedeemableConvertiblePreferredStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis": { "auth_ref": [ "r218", "r219" ], "lang": { "en-US": { "role": { "documentation": "Information by form of arrangement related to research and development.", "label": "Research And Development Arrangement Contract To Perform For Others By Type [Axis]", "terseLabel": "Research and Development Arrangement, Contract to Perform for Others, Type" } } }, "localname": "ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain": { "auth_ref": [ "r218", "r219" ], "lang": { "en-US": { "role": { "documentation": "Listing of significant agreements under research and development arrangements accounted for as a contract to perform research and development for others.", "label": "Research And Development Arrangement Contract To Perform For Others Type [Domain]", "terseLabel": "Research and Development Arrangement, Contract to Perform for Others, Type" } } }, "localname": "ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ResearchAndDevelopmentExpense": { "auth_ref": [ "r217", "r321" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10100.0, "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", "verboseLabel": "Research and development expense" } } }, "localname": "ResearchAndDevelopmentExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseRecognizedDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ResearchAndDevelopmentExpensePolicy": { "auth_ref": [ "r85", "r217" ], "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", "terseLabel": "Research and Development Costs and Accruals" } } }, "localname": "ResearchAndDevelopmentExpensePolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Type of cash and cash equivalent. Cash is 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": "Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member]", "terseLabel": "Cash and Cash Equivalents" } } }, "localname": "RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_RestrictedCashAndCashEquivalentsNoncurrent": { "auth_ref": [ "r5", "r13", "r77", "r82", "r319" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10180.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Restricted Cash And Cash Equivalents Noncurrent", "terseLabel": "Restricted cash", "verboseLabel": "Restricted cash deposit" } } }, "localname": "RestrictedCashAndCashEquivalentsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestrictedStockUnitsRSUMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met.", "label": "Restricted Stock Units R S U [Member]", "terseLabel": "Restricted Stock Units [Member]" } } }, "localname": "RestrictedStockUnitsRSUMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail" ], "xbrltype": "domainItemType" }, "us-gaap_RetainedEarningsAccumulatedDeficit": { "auth_ref": [ "r18", "r163", "r307" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10080.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings Accumulated Deficit", "terseLabel": "Accumulated deficit" } } }, "localname": "RetainedEarningsAccumulatedDeficit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings [Member]", "terseLabel": "Accumulated Deficit [Member]" } } }, "localname": "RetainedEarningsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_RevenueFromContractWithCustomerPolicyTextBlock": { "auth_ref": [ "r86", "r170" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for revenue from contract with customer.", "label": "Revenue From Contract With Customer Policy [Text Block]", "terseLabel": "Revenue Recognition" } } }, "localname": "RevenueFromContractWithCustomerPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_RevenueRemainingPerformanceObligation": { "auth_ref": [ "r167" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of transaction price allocated to performance obligation that has not been recognized as revenue.", "label": "Revenue Remaining Performance Obligation", "terseLabel": "Standalone selling price of license performance obligation" } } }, "localname": "RevenueRemainingPerformanceObligation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_Revenues": { "auth_ref": [ "r58", "r111", "r112", "r114" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10070.0, "parentTag": "us-gaap_OperatingIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).", "label": "Revenues", "positiveLabel": "Total revenue", "terseLabel": "Total revenue", "verboseLabel": "Revenue" } } }, "localname": "Revenues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedSummaryOfQuarterlyFinancialInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": { "auth_ref": [ "r280", "r285" ], "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 new operating lease liabilities" } } }, "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfSupplementalDisclosureOfCashFlowInformationRelatedToOperatingLeasesDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_SaleOfStockNameOfTransactionDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Sale of the entity's stock, including, but not limited to, initial public offering (IPO) and private placement.", "label": "Sale Of Stock Name Of Transaction [Domain]", "terseLabel": "Sale of Stock" } } }, "localname": "SaleOfStockNameOfTransactionDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "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": "Summary of Accrued Expenses" } } }, "localname": "ScheduleOfAccruedLiabilitiesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable": { "auth_ref": [ "r96" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfAntiDilutiveCommonStockEquivalentsOutstandingDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock": { "auth_ref": [ "r96" ], "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 [Text Block]", "terseLabel": "Summary of Anti-Dilutive Common Stock Equivalents Outstanding" } } }, "localname": "ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Schedule Of Available For Sale Securities [Line Items]", "terseLabel": "Schedule of Available-for-sale Securities [Line Items]" } } }, "localname": "ScheduleOfAvailableForSaleSecuritiesLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfAvailableForSaleSecuritiesTable": { "auth_ref": [ "r130", "r131", "r132", "r133", "r134", "r135", "r301", "r302" ], "lang": { "en-US": { "role": { "documentation": "Schedule of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.", "label": "Schedule Of Available For Sale Securities [Table]", "terseLabel": "Schedule Of Available For Sale Securities [Table]" } } }, "localname": "ScheduleOfAvailableForSaleSecuritiesTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable": { "auth_ref": [ "r249" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.", "label": "Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]", "terseLabel": "Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]" } } }, "localname": "ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock": { "auth_ref": [ "r207" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.", "label": "Schedule Of Compensation Cost For Share Based Payment Arrangements Allocation Of Share Based Compensation Costs By Plan Table [Text Block]", "terseLabel": "Summary of Stock-Based Compensation Expense by Award Type Recognized" } } }, "localname": "ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock": { "auth_ref": [ "r236" ], "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": "Summary of Significant Components of Company's Net Deferred Tax Asset" } } }, "localname": "ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": { "auth_ref": [ "r97" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.", "label": "Schedule Of Earnings Per Share Basic And Diluted Table [Text Block]", "terseLabel": "Summary of Basic and Diluted Net Loss Per Share" } } }, "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": { "auth_ref": [ "r226" ], "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": "Summary of Reconciliation of U.S. Statutory Rate to Company's Effective Tax Rate" } } }, "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock": { "auth_ref": [ "r180", "r207", "r213" ], "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": "Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block]", "terseLabel": "Summary of Stock-Based Compensation Expense Recognized" } } }, "localname": "ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock": { "auth_ref": [ "r268" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date.", "label": "Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block]", "terseLabel": "Schedule of Future Minimum Lease Payments, Under Non-Cancelable Operating Leases" } } }, "localname": "ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfPropertyPlantAndEquipmentTable": { "auth_ref": [ "r27", "r153" ], "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": "Schedule Of Property Plant And Equipment [Table]", "terseLabel": "Schedule Of Property Plant And Equipment [Table]" } } }, "localname": "ScheduleOfPropertyPlantAndEquipmentTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponentsSummaryOfPropertyAndEquipmentNetDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock": { "auth_ref": [ "r101" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data.", "label": "Schedule Of Quarterly Financial Information Table [Text Block]", "terseLabel": "Summary of Quarterly Financial Information" } } }, "localname": "ScheduleOfQuarterlyFinancialInformationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": { "auth_ref": [ "r181", "r210" ], "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]", "terseLabel": "Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]" } } }, "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseRecognizedDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock": { "auth_ref": [ "r187" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.", "label": "Schedule Of Share Based Compensation Restricted Stock Units Award Activity Table [Text Block]", "terseLabel": "Summary of Activity Relating to Restricted Stock Units" } } }, "localname": "ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock": { "auth_ref": [ "r187", "r196", "r199" ], "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": "Schedule Of Share Based Compensation Stock Options Activity Table [Text Block]", "terseLabel": "Summary of Activity Relating to Time Based and Performance Based Stock Options" } } }, "localname": "ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock": { "auth_ref": [ "r201" ], "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": "Summary of Weighted Average Assumptions Used to Compute Fair Value of Option Granted" } } }, "localname": "ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentReportingPolicyPolicyTextBlock": { "auth_ref": [ "r85" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for segment reporting.", "label": "Segment Reporting Policy Policy [Text Block]", "terseLabel": "Segment Data" } } }, "localname": "SegmentReportingPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_SellingGeneralAndAdministrativeExpense": { "auth_ref": [ "r60", "r138" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss": { "order": 10110.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.", "label": "Selling General And Administrative Expense", "terseLabel": "Selling, general and administrative" } } }, "localname": "SellingGeneralAndAdministrativeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_SellingGeneralAndAdministrativeExpensesMember": { "auth_ref": [ "r63" ], "lang": { "en-US": { "role": { "documentation": "Primary financial statement caption encompassing selling, general and administrative expense.", "label": "Selling General And Administrative Expenses [Member]", "terseLabel": "Selling, General and Administrative [Member]" } } }, "localname": "SellingGeneralAndAdministrativeExpensesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseRecognizedDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ShareBasedCompensation": { "auth_ref": [ "r74" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10120.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of noncash expense for share-based payment arrangement.", "label": "Share Based Compensation", "terseLabel": "Stock-based compensation expense" } } }, "localname": "ShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1": { "auth_ref": [ "r182" ], "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 Period1", "terseLabel": "Share based compensation granted under plan vested period" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod": { "auth_ref": [ "r192" ], "lang": { "en-US": { "role": { "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period", "negatedLabel": "Forfeited, Shares", "verboseLabel": "Restricted stock units granted" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod": { "auth_ref": [ "r194" ], "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": "Granted, Shares", "verboseLabel": "Restricted stock units granted" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber": { "auth_ref": [ "r193" ], "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": "Outstanding, Shares at ending balance", "periodStartLabel": "Outstanding, Shares at beginning balance", "verboseLabel": "Outstanding and unvested performance restricted stock units" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod": { "auth_ref": [ "r195" ], "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", "negatedLabel": "Vested, Shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue": { "auth_ref": [ "r198" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value", "terseLabel": "Fair value of restricted stock units vested" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate": { "auth_ref": [ "r204" ], "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 yield" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfWeightedAverageAssumptionsUsedToComputeFairValueOfOptionGrantedDetail" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate": { "auth_ref": [ "r203" ], "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" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfWeightedAverageAssumptionsUsedToComputeFairValueOfOptionGrantedDetail" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate": { "auth_ref": [ "r205" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfWeightedAverageAssumptionsUsedToComputeFairValueOfOptionGrantedDetail" ], "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]", "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award [Line Items]" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseRecognizedDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized": { "auth_ref": [ "r184" ], "lang": { "en-US": { "role": { "documentation": "Number of shares authorized for issuance under share-based payment arrangement.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized", "terseLabel": "Total number of shares reserved for issuance", "verboseLabel": "Shares of common stock initially authorized for issuance under this plan" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant": { "auth_ref": [ "r210" ], "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": "Common stock available for issuance under stock option plan" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber": { "auth_ref": [ "r190" ], "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": "Exercisable, Shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice": { "auth_ref": [ "r190" ], "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": "Exercisable, Weighted Average Exercise Price" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue": { "auth_ref": [ "r198" ], "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 Total Intrinsic Value", "terseLabel": "Intrinsic value of options exercised" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod": { "auth_ref": [ "r192" ], "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": "Forfeited, Shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Gross number of share options (or share units) granted during the period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross", "terseLabel": "Options granted", "verboseLabel": "Granted, Shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": { "auth_ref": [ "r197" ], "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 per share" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue": { "auth_ref": [ "r210" ], "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", "terseLabel": "Outstanding, Aggregate Intrinsic Value" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber": { "auth_ref": [ "r189", "r210" ], "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": "Ending balance, Outstanding Shares", "periodStartLabel": "Beginning balance, Outstanding Shares", "terseLabel": "Total number of shares reserved" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecrease": { "auth_ref": [ "r187" ], "lang": { "en-US": { "role": { "documentation": "The increase or decrease in number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding, including vested options.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Period Increase Decrease", "terseLabel": "Common stock shares annual increase added to plan" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecrease", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice": { "auth_ref": [ "r188" ], "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": "Ending balance, Outstanding Weighted Average Exercise Price", "periodStartLabel": "Beginning balance, Outstanding Weighted Average Exercise Price" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue": { "auth_ref": [ "r199" ], "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": "Vested and expected to vest, Aggregate Intrinsic Value" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber": { "auth_ref": [ "r200" ], "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": "Vested and expected to vest, Shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice": { "auth_ref": [ "r200" ], "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": "Vested and expected to vest, Weighted Average Exercise Price" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod": { "auth_ref": [ "r210" ], "lang": { "en-US": { "role": { "documentation": "Number of shares issued under share-based payment arrangement.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period", "terseLabel": "Total number of shares available for issuance" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": { "auth_ref": [ "r179", "r185" ], "lang": { "en-US": { "role": { "documentation": "Award under share-based payment arrangement.", "label": "Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]", "terseLabel": "Award Type" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToRestrictedStockUnitsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseByAwardTypeRecognizedDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Weighted average price at which option holders acquired shares when converting their stock options into shares.", "label": "Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price", "terseLabel": "Exercised, Weighted Average Exercise Price" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.", "label": "Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price", "terseLabel": "Forfeited, Weighted Average Exercise Price" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.", "label": "Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price", "terseLabel": "Granted, Weighted Average Exercise Price" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationAwardTrancheOneMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "First portion of award under share-based payment arrangement differentiated by vesting feature, including, but not limited to, performance measure or service period.", "label": "Share Based Compensation Award Tranche One [Member]", "terseLabel": "Restricted Stock Units Vest One Year Anniversary [Member]" } } }, "localname": "ShareBasedCompensationAwardTrancheOneMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ShareBasedCompensationAwardTrancheTwoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Second portion of award under share-based payment arrangement differentiated by vesting feature, including, but not limited to, performance measure or service period.", "label": "Share Based Compensation Award Tranche Two [Member]", "terseLabel": "Restricted Stock Units Vest Two Year Anniversary [Member]" } } }, "localname": "ShareBasedCompensationAwardTrancheTwoMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage": { "auth_ref": [ "r182" ], "lang": { "en-US": { "role": { "documentation": "Percentage of vesting of award under share-based payment arrangement.", "label": "Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage", "terseLabel": "Restricted stock units cliff vesting percentage" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod": { "auth_ref": [ "r183" ], "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": "Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period", "terseLabel": "Share based compensation, term of plan" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1": { "auth_ref": [ "r202", "r212" ], "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": "Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1", "terseLabel": "Expected life of option" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfWeightedAverageAssumptionsUsedToComputeFairValueOfOptionGrantedDetail" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1": { "auth_ref": [ "r210" ], "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": "Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1", "terseLabel": "Exercisable, Aggregate Intrinsic Value" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1": { "auth_ref": [ "r210" ], "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": "Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1", "terseLabel": "Exercisable, Weighted Average Remaining Life" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of non-vested options outstanding.", "label": "Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares", "terseLabel": "Number of shares outstanding and unvested stock options" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2": { "auth_ref": [ "r200" ], "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": "Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2", "terseLabel": "Outstanding, Weighted Average Remaining Life" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1": { "auth_ref": [ "r200" ], "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": "Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1", "terseLabel": "Vested and expected to vest, Weighted Average Remaining Life" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail" ], "xbrltype": "durationItemType" }, "us-gaap_SharesIssued": { "auth_ref": [ "r161" ], "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": "Balances, Shares", "periodStartLabel": "Balances, Shares" } } }, "localname": "SharesIssued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_SharesIssuedPricePerShare": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Per share or per unit amount of equity securities issued.", "label": "Shares Issued Price Per Share", "terseLabel": "Common stock price per share" } } }, "localname": "SharesIssuedPricePerShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_ShortTermDebtTypeAxis": { "auth_ref": [ "r30" ], "lang": { "en-US": { "role": { "documentation": "Information by type of short-term debt arrangement.", "label": "Short Term Debt Type [Axis]", "terseLabel": "Short-term Debt, Type" } } }, "localname": "ShortTermDebtTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ShortTermDebtTypeDomain": { "auth_ref": [ "r29" ], "lang": { "en-US": { "role": { "documentation": "Type of short-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing.", "label": "Short Term Debt Type [Domain]", "terseLabel": "Short-term Debt, Type" } } }, "localname": "ShortTermDebtTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_ShortTermLeaseCost": { "auth_ref": [ "r277", "r285" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail": { "order": 10030.0, "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 cost" } } }, "localname": "ShortTermLeaseCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_SignificantAccountingPoliciesTextBlock": { "auth_ref": [ "r89" ], "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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/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 and Local Jurisdiction [Member]" } } }, "localname": "StateAndLocalJurisdictionMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_StatementClassOfStockAxis": { "auth_ref": [ "r14", "r15", "r16", "r161" ], "lang": { "en-US": { "role": { "documentation": "Information by the different classes of stock of the entity.", "label": "Statement Class Of Stock [Axis]", "terseLabel": "Class of Stock" } } }, "localname": "StatementClassOfStockAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_StatementEquityComponentsAxis": { "auth_ref": [ "r38", "r161" ], "lang": { "en-US": { "role": { "documentation": "Information by component of equity.", "label": "Statement Equity Components [Axis]", "terseLabel": "Equity Components" } } }, "localname": "StatementEquityComponentsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/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/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "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/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfFinancialPositionAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement Of Financial Position [Abstract]" } } }, "localname": "StatementOfFinancialPositionAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement Of Stockholders Equity [Abstract]" } } }, "localname": "StatementOfStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.", "label": "Statement [Table]", "terseLabel": "Statement [Table]" } } }, "localname": "StatementTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "stringItemType" }, "us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans": { "auth_ref": [ "r15", "r16", "r161", "r163" ], "lang": { "en-US": { "role": { "documentation": "Number of shares issued during the period as a result of an employee stock purchase plan.", "label": "Stock Issued During Period Shares Employee Stock Purchase Plans", "terseLabel": "Issuance of common stock under employee stock purchase plan, Shares", "verboseLabel": "Number of shares issued under the plan" } } }, "localname": "StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodSharesNewIssues": { "auth_ref": [ "r15", "r16", "r161", "r163" ], "lang": { "en-US": { "role": { "documentation": "Number of new stock issued during the period.", "label": "Stock Issued During Period Shares New Issues", "terseLabel": "Public offering of common stock, net of offering costs, Shares", "verboseLabel": "Issuance of common stock, shares" } } }, "localname": "StockIssuedDuringPeriodSharesNewIssues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross": { "auth_ref": [ "r161", "r163" ], "lang": { "en-US": { "role": { "documentation": "Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.", "label": "Stock Issued During Period Shares Restricted Stock Award Gross", "terseLabel": "Vesting of restricted stock units, net of employee tax obligations, Shares" } } }, "localname": "StockIssuedDuringPeriodSharesRestrictedStockAwardGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised": { "auth_ref": [ "r15", "r16", "r161", "r163", "r191" ], "lang": { "en-US": { "role": { "documentation": "Number of share options (or share units) exercised during the current period.", "label": "Stock Issued During Period Shares Stock Options Exercised", "negatedLabel": "Exercised, Shares", "terseLabel": "Issuance of common stock from exercise of stock options, Shares" } } }, "localname": "StockIssuedDuringPeriodSharesStockOptionsExercised", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfActivityRelatingToTimeBasedAndPerformanceBasedStockOptionsDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan": { "auth_ref": [ "r15", "r16", "r161", "r163" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.", "label": "Stock Issued During Period Value Employee Stock Purchase Plan", "terseLabel": "Issuance of common stock under employee stock purchase plan" } } }, "localname": "StockIssuedDuringPeriodValueEmployeeStockPurchasePlan", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockIssuedDuringPeriodValueNewIssues": { "auth_ref": [ "r15", "r16", "r161", "r163" ], "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": "Public offering of common stock, net of offering costs, Amount" } } }, "localname": "StockIssuedDuringPeriodValueNewIssues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross": { "auth_ref": [ "r15", "r16", "r161", "r163" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregate value of stock related to Restricted Stock Awards issued during the period.", "label": "Stock Issued During Period Value Restricted Stock Award Gross", "terseLabel": "Vesting of restricted stock units, net of employee tax obligations" } } }, "localname": "StockIssuedDuringPeriodValueRestrictedStockAwardGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised": { "auth_ref": [ "r38", "r161", "r163" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Value of stock issued as a result of the exercise of stock options.", "label": "Stock Issued During Period Value Stock Options Exercised", "terseLabel": "Issuance of common stock from exercise of stock options, Amount" } } }, "localname": "StockIssuedDuringPeriodValueStockOptionsExercised", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquity": { "auth_ref": [ "r16", "r19", "r20", "r123" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10030.0, "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", "periodEndLabel": "Balances", "periodStartLabel": "Balances", "totalLabel": "Total stockholders\u2019 equity" } } }, "localname": "StockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Stockholders Equity [Abstract]", "terseLabel": "Stockholders\u2019 equity:" } } }, "localname": "StockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_SubsidiarySaleOfStockAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by type of sale of the entity's stock.", "label": "Subsidiary Sale Of Stock [Axis]", "terseLabel": "Sale of Stock" } } }, "localname": "SubsidiarySaleOfStockAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_SupplementalBalanceSheetDisclosuresTextBlock": { "auth_ref": [ "r42" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity.", "label": "Supplemental Balance Sheet Disclosures [Text Block]", "terseLabel": "Balance Sheet Components" } } }, "localname": "SupplementalBalanceSheetDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureBalanceSheetComponents" ], "xbrltype": "textBlockItemType" }, "us-gaap_TaxCreditCarryforwardAmount": { "auth_ref": [ "r238" ], "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": "Federal orphan drug tax credit carry forwards" } } }, "localname": "TaxCreditCarryforwardAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_TemporaryEquityDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Temporary Equity Disclosure [Abstract]" } } }, "localname": "TemporaryEquityDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_TextBlockAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Text Block [Abstract]" } } }, "localname": "TextBlockAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_TradeAndOtherAccountsReceivablePolicy": { "auth_ref": [ "r118", "r119", "r120", "r121", "r122", "r124" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for accounts receivable.", "label": "Trade And Other Accounts Receivable Policy", "terseLabel": "Accounts Receivable" } } }, "localname": "TradeAndOtherAccountsReceivablePolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_TreasuryStockCommonShares": { "auth_ref": [ "r39", "r164" ], "lang": { "en-US": { "role": { "documentation": "Number of previously issued common shares repurchased by the issuing entity and held in treasury.", "label": "Treasury Stock Common Shares", "terseLabel": "Treasury stock, shares" } } }, "localname": "TreasuryStockCommonShares", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_TreasuryStockCommonValue": { "auth_ref": [ "r39", "r164", "r165" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10060.0, "parentTag": "us-gaap_StockholdersEquity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury.", "label": "Treasury Stock Common Value", "negatedLabel": "Treasury stock, at cost, 3,033 shares at December 31, 2019 and December 31, 2018", "terseLabel": "Total cost of shares held in treasury" } } }, "localname": "TreasuryStockCommonValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStockAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_TreasuryStockMember": { "auth_ref": [ "r37", "r164" ], "lang": { "en-US": { "role": { "documentation": "Shares of an entity that have been repurchased by the entity. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.", "label": "Treasury Stock [Member]", "terseLabel": "Treasury Stock [Member]" } } }, "localname": "TreasuryStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_TreasuryStockSharesAcquired": { "auth_ref": [ "r16", "r161", "r163" ], "lang": { "en-US": { "role": { "documentation": "Number of shares that have been repurchased during the period and are being held in treasury.", "label": "Treasury Stock Shares Acquired", "negatedLabel": "Purchase of treasury stock, Shares", "verboseLabel": "Purchase of treasury stock, Shares" } } }, "localname": "TreasuryStockSharesAcquired", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommonStockAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_TreasuryStockValueAcquiredCostMethod": { "auth_ref": [ "r161", "r163", "r164" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.", "label": "Treasury Stock Value Acquired Cost Method", "negatedLabel": "Purchase of treasury stock, Amount" } } }, "localname": "TreasuryStockValueAcquiredCostMethod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_TypeOfAdoptionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Adoption and early adoption of sources of change to generally accepted accounting principles (GAAP) in the United States. The FASB released the FASB Accounting Standards Codification as the authoritative source of literature effective for interim and annual periods ending after September 15, 2009. As part of the Codification process, the FASB issues Accounting Standards Updates to amend the Codification but otherwise the Accounting Standards Updates are not authoritative in their own right. All previous accounting standards (such as FASB Statements of Financial Accounting Standards, FASB Interpretations, FASB Staff Positions, Emerging Issues Task Force Consensuses, other pronouncements of the FASB or other designated bodies, or other forms of GAAP are considered accounting pronouncements) were superseded upon the adoption of the Codification. For an interim period, references to the superseded standards are included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.", "label": "Type Of Adoption [Member]", "terseLabel": "Type of Adoption" } } }, "localname": "TypeOfAdoptionMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumLeasePaymentsDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_TypeOfArrangementAxis": { "auth_ref": [ "r249" ], "lang": { "en-US": { "role": { "documentation": "Information by collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.", "label": "Type Of Arrangement [Axis]", "terseLabel": "Collaborative Arrangement and Arrangement Other than Collaborative" } } }, "localname": "TypeOfArrangementAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCollaborationAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesConsultingAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesCydexLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesUniversityOfCaliforniaLicenseAgreementsAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesWashingtonUniversityLicenseAgreementAdditionalInformationDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_TypeOfRevenueExtensibleList": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indicates type of revenue from product and service. Includes, but is not limited to, revenue from contract with customer and other sources.", "label": "Type Of Revenue Extensible List", "terseLabel": "Type of Revenue [Extensible List]" } } }, "localname": "TypeOfRevenueExtensibleList", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "extensibleListItemType" }, "us-gaap_USTreasurySecuritiesMember": { "auth_ref": [ "r174", "r176", "r297" ], "lang": { "en-US": { "role": { "documentation": "This category includes information about debt securities issued by the United States Department of the Treasury and backed by the United States government. Such securities primarily consist of treasury bills (short-term maturities - one year or less), treasury notes (intermediate term maturities - two to ten years), and treasury bonds (long-term maturities - ten to thirty years).", "label": "U S Treasury Securities [Member]", "terseLabel": "U.S. Government Securities [Member]" } } }, "localname": "USTreasurySecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfCompanySMoneyMarketFundsAndMarketableSecuritiesDetail", "http://www.sagerx.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfGrossUnrealizedGainsAndLossesOfMarketableSecuritiesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_UnrecognizedTaxBenefits": { "auth_ref": [ "r222", "r230" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of unrecognized tax benefits.", "label": "Unrecognized Tax Benefits", "terseLabel": "Unrecognized tax benefits" } } }, "localname": "UnrecognizedTaxBenefits", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_UseOfEstimates": { "auth_ref": [ "r103", "r104", "r106", "r107", "r108", "r109", "r110" ], "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", "terseLabel": "Use of Estimates" } } }, "localname": "UseOfEstimates", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount": { "auth_ref": [ "r223" ], "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 Change In Amount", "terseLabel": "Change in amount of deferred tax assets" } } }, "localname": "ValuationAllowanceDeferredTaxAssetChangeInAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableLeaseCost": { "auth_ref": [ "r278", "r285" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail": { "order": 10020.0, "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 cost" } } }, "localname": "VariableLeaseCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseCostsRecordedInConsolidatedStatementsOfOperationsAndComprehensiveLossDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_VestingAxis": { "auth_ref": [ "r210" ], "lang": { "en-US": { "role": { "documentation": "Information by vesting schedule of award under share-based payment arrangement.", "label": "Vesting [Axis]", "terseLabel": "Vesting" } } }, "localname": "VestingAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_VestingDomain": { "auth_ref": [ "r210" ], "lang": { "en-US": { "role": { "documentation": "Vesting schedule of award under share-based payment arrangement.", "label": "Vesting [Domain]", "terseLabel": "Vesting" } } }, "localname": "VestingDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": { "auth_ref": [ "r92", "r95" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "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 Diluted Shares Outstanding", "totalLabel": "Weighted average common stock outstanding \u2014diluted" } } }, "localname": "WeightedAverageNumberOfDilutedSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).", "label": "Weighted Average Number Of Share Outstanding Basic And Diluted", "terseLabel": "Weighted average number of common shares outstanding\u2014basic and diluted" } } }, "localname": "WeightedAverageNumberOfShareOutstandingBasicAndDiluted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Weighted Average Number Of Shares Outstanding [Abstract]", "terseLabel": "Denominator:" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail" ], "xbrltype": "stringItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": { "auth_ref": [ "r91", "r95" ], "calculation": { "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail": { "order": 10010.0, "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding", "weight": 1.0 } }, "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 stock outstanding \u2014basic" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.sagerx.com/20191231/taxonomy/role/DisclosureNetLossPerShareSummaryOfBasicAndDilutedNetLossPerShareDetail" ], "xbrltype": "sharesItemType" } }, "unitCount": 7 } }, "std_ref": { "r0": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "205", "URI": "http://asc.fasb.org/topic&trid=2122149" }, "r1": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r10": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r100": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=116846552&loc=d3e543-108305" }, "r101": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306" }, "r102": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "270", "URI": "http://asc.fasb.org/topic&trid=2126967" }, "r103": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592" }, "r104": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592" }, "r105": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592" }, "r106": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6161-108592" }, "r107": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6191-108592" }, "r108": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6061-108592" }, "r109": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6132-108592" }, "r11": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(13))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r110": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6143-108592" }, "r111": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r112": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r113": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r114": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599" }, "r115": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599" }, "r116": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599" }, "r117": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118952595&loc=d3e4647-111522" }, "r118": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e4975-111524" }, "r119": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524" }, "r12": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(14))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r120": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524" }, "r121": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5033-111524" }, "r122": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5093-111524" }, "r123": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 4.E)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707" }, "r124": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=84159169&loc=d3e10133-111534" }, "r125": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562" }, "r126": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118954083&loc=d3e26626-111562" }, "r127": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563" }, "r128": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563" }, "r129": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563" }, "r13": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(17))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r130": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563" }, "r131": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27198-111563" }, "r132": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563" }, "r133": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563" }, "r134": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27340-111563" }, "r135": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)-(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563" }, "r136": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "320", "URI": "http://asc.fasb.org/topic&trid=2196928" }, "r137": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454" }, "r138": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "30", "SubTopic": "10", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311" }, "r139": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=116847112&loc=d3e4492-108314" }, "r14": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(27))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r140": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=116847112&loc=d3e4556-108314" }, "r141": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274" }, "r142": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r143": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r144": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "((a)(1),(b))", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r145": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r146": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(1)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r147": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r148": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226317&loc=d3e202-110218" }, "r149": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228" }, "r15": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(28))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r150": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r151": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r152": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r153": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r154": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230" }, "r155": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.CC)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=27011434&loc=d3e125687-122742" }, "r156": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "440", "URI": "http://asc.fasb.org/topic&trid=2144648" }, "r157": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349" }, "r158": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14615-108349" }, "r159": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "450", "URI": "http://asc.fasb.org/topic&trid=2127136" }, "r16": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(29))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r160": { "Name": "Accounting Standards Codification", "Paragraph": "12A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=99376301&loc=SL5988623-112600" }, "r161": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644" }, "r162": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644" }, "r163": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3-04)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770" }, "r164": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655" }, "r165": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656" }, "r166": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "505", "URI": "http://asc.fasb.org/topic&trid=2208762" }, "r167": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130556-203045" }, "r168": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045" }, "r169": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r17": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r170": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "606", "URI": "http://asc.fasb.org/topic&trid=49130388" }, "r171": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "705", "URI": "http://asc.fasb.org/topic&trid=2122478" }, "r172": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "710", "URI": "http://asc.fasb.org/topic&trid=2127225" }, "r173": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "712", "URI": "http://asc.fasb.org/topic&trid=2197446" }, "r174": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(ii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r175": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(01)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r176": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921" }, "r177": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "715", "URI": "http://asc.fasb.org/topic&trid=2235017" }, "r178": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116855982&loc=d3e4534-113899" }, "r179": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901" }, "r18": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r180": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901" }, "r181": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901" }, "r182": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r183": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r184": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r185": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r186": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b),(f(1))", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r187": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r188": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r189": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(i)-(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r19": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r190": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r191": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r192": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r193": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(i)-(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r194": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r195": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r196": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r197": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r198": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r199": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r2": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r20": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(31))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r200": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r201": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r202": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r203": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r204": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(iii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r205": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(iv)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r206": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r207": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r208": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)(1)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r209": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r21": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(32))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r210": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r211": { "Name": "Accounting Standards Codification", "Paragraph": "2A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901" }, "r212": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 14.D.2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809" }, "r213": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 14.F)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809" }, "r214": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=118258462&loc=d3e11149-113907" }, "r215": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=118258462&loc=d3e11178-113907" }, "r216": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "718", "URI": "http://asc.fasb.org/topic&trid=2228938" }, "r217": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "730", "URI": "http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373" }, "r218": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "730", "URI": "http://asc.fasb.org/extlink&oid=6420387&loc=d3e23199-108380" }, "r219": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "730", "URI": "http://asc.fasb.org/extlink&oid=6420387&loc=d3e23221-108380" }, "r22": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(7))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r220": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=117330534&loc=d3e28680-109314" }, "r221": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=117330534&loc=d3e28680-109314" }, "r222": { "Name": "Accounting Standards Codification", "Paragraph": "10B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=SL37586934-109318" }, "r223": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e32123-109318" }, "r224": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e32247-109318" }, "r225": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e32280-109318" }, "r226": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319" }, "r227": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319" }, "r228": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319" }, "r229": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319" }, "r23": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(8))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r230": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r231": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319" }, "r232": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319" }, "r233": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r234": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b),(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r235": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r236": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r237": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319" }, "r238": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319" }, "r239": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319" }, "r24": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.1)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r240": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319" }, "r241": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r242": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r243": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 6.I)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r244": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.I.7)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r245": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "05", "SubTopic": "30", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=65884525&loc=d3e40913-109327" }, "r246": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "740", "URI": "http://asc.fasb.org/topic&trid=2144680" }, "r247": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "808", "URI": "http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434" }, "r248": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "808", "URI": "http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434" }, "r249": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "808", "URI": "http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434" }, "r25": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r250": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "808", "URI": "http://asc.fasb.org/topic&trid=5833765" }, "r251": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683" }, "r252": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r253": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r254": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c),(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r255": { "Name": "Accounting Standards Codification", "Paragraph": "4J", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4591551-111686" }, "r256": { "Name": "Accounting Standards Codification", "Paragraph": "4K", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4591552-111686" }, "r257": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "810", "URI": "http://asc.fasb.org/topic&trid=2197479" }, "r258": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r259": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r26": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r260": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r261": { "Name": "Accounting Standards Codification", "Paragraph": "2C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL7498348-110258" }, "r262": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258" }, "r263": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "820", "URI": "http://asc.fasb.org/topic&trid=2155941" }, "r264": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "230", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906" }, "r265": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(Note 3)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697" }, "r266": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717" }, "r267": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717" }, "r268": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717" }, "r269": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=119364159&loc=SL77916155-209984" }, "r27": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.14)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r270": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r271": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r272": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977" }, "r273": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918666-209980" }, "r274": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980" }, "r275": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980" }, "r276": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r277": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r278": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r279": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(1)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r28": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.17)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r280": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(2)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r281": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r282": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(4)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r283": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r284": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980" }, "r285": { "Name": "Accounting Standards Codification", "Paragraph": "53", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971" }, "r286": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=119202524&loc=SL77919359-209981" }, "r287": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864" }, "r288": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "855", "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314020-165662" }, "r289": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r29": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r290": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r291": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r292": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r293": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "340", "Topic": "928", "URI": "http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004" }, "r294": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(1)(a))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r295": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(11))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r296": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r297": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(6)(a)(1))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r298": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.15(5))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r299": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.17)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r3": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r30": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r300": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(22))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r301": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803" }, "r302": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803" }, "r303": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62652-112803" }, "r304": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "405", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817" }, "r305": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "825", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=108315417&loc=d3e61044-112788" }, "r306": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(12))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r307": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r308": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(25))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r309": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(8))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r31": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19-26)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r310": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.(a),19)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r311": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.15(a))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r312": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(18))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r313": { "Name": "Accounting Standards Codification", "Paragraph": "4H", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438" }, "r314": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441" }, "r315": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12(2)(i))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010" }, "r316": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12C(1)(a))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r317": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-13(1))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010" }, "r318": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15(Column A))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010" }, "r319": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "210", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=116631420&loc=SL116631458-115580" }, "r32": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.2)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r320": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650" }, "r321": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "985", "URI": "http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756" }, "r322": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b" }, "r323": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-23" }, "r324": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "d1-1" }, "r325": { "Name": "Forms 10-K, 10-Q, 20-F", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-1-" }, "r326": { "Name": "Forms 10-K, 20-F, 40-F", "Number": "240", "Publisher": "SEC", "Section": "15", "Subsection": "d-1" }, "r327": { "Name": "Regulation 12B", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-2" }, "r328": { "Name": "Regulation S-T", "Number": "232", "Publisher": "SEC", "Section": "405" }, "r33": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.20)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r34": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.21)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r35": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.24)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r36": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.25)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r37": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29,30)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r38": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29-31)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r39": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.30)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r4": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6801-107765" }, "r40": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.6(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r41": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.9)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r42": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "210", "URI": "http://asc.fasb.org/topic&trid=2122208" }, "r43": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r44": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r45": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r46": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580" }, "r47": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580" }, "r48": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580" }, "r49": { "Name": "Accounting Standards Codification", "Paragraph": "17B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724394-108580" }, "r5": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6812-107765" }, "r50": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r51": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r52": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r53": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580" }, "r54": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580" }, "r55": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e557-108580" }, "r56": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116657188&loc=SL116659661-227067" }, "r57": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118951672&loc=d3e1436-108581" }, "r58": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(1))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r59": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(20))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r6": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6911-107765" }, "r60": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.4)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r61": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.8)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&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": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r63": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r64": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3151-108585" }, "r65": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585" }, "r66": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r67": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r68": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585" }, "r69": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r7": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6935-107765" }, "r70": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r71": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3000-108585" }, "r72": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585" }, "r73": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585" }, "r74": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r75": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r76": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r77": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585" }, "r78": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4273-108586" }, "r79": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586" }, "r8": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e7018-107765" }, "r80": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586" }, "r81": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586" }, "r82": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586" }, "r83": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513396&loc=SL98516241-196980" }, "r84": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18726-107790" }, "r85": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790" }, "r86": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790" }, "r87": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r88": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r89": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "235", "URI": "http://asc.fasb.org/topic&trid=2122369" }, "r9": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766" }, "r90": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794" }, "r91": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1448-109256" }, "r92": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1505-109256" }, "r93": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1930-109256" }, "r94": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256" }, "r95": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r96": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r97": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r98": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257" }, "r99": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "260", "URI": "http://asc.fasb.org/topic&trid=2144383" } }, "version": "2.1" }