3.8.0.1 html 134 279 1 false 49 0 false 6 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.corcept.com/20171231/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - BALANCE SHEETS Sheet http://www.corcept.com/20171231/taxonomy/role/StatementBALANCESHEETS BALANCE SHEETS Statements 2 false false R3.htm 100020 - Statement - BALANCE SHEETS (Parenthetical) Sheet http://www.corcept.com/20171231/taxonomy/role/StatementBALANCESHEETSParenthetical BALANCE SHEETS (Parenthetical) Statements 3 false false R4.htm 100030 - Statement - STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Sheet http://www.corcept.com/20171231/taxonomy/role/StatementSTATEMENTSOFCOMPREHENSIVEINCOMELOSS STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statements 4 false false R5.htm 100040 - Statement - STATEMENTS OF STOCKHOLDERS EQUITY (DEFICIT) Sheet http://www.corcept.com/20171231/taxonomy/role/StatementSTATEMENTSOFSTOCKHOLDERSEQUITYDEFICIT STATEMENTS OF STOCKHOLDERS EQUITY (DEFICIT) Statements 5 false false R6.htm 100050 - Statement - STATEMENTS OF CASH FLOWS Sheet http://www.corcept.com/20171231/taxonomy/role/StatementSTATEMENTSOFCASHFLOWS STATEMENTS OF CASH FLOWS Statements 6 false false R7.htm 100060 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies Basis of Presentation and Summary of Significant Accounting Policies Notes 7 false false R8.htm 100070 - Disclosure - Significant Agreements Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureSignificantAgreements Significant Agreements Notes 8 false false R9.htm 100080 - Disclosure - Fair Value of Financial Instruments Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureFairValueOfFinancialInstruments Fair Value of Financial Instruments Notes 9 false false R10.htm 100090 - Disclosure - Composition of Certain Balance Sheet Items Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItems Composition of Certain Balance Sheet Items Notes 10 false false R11.htm 100100 - Disclosure - Debt Obligation Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureDebtObligation Debt Obligation Notes 11 false false R12.htm 100110 - Disclosure - Lease Obligation Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureLeaseObligation Lease Obligation Notes 12 false false R13.htm 100120 - Disclosure - Related Party Transactions Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureRelatedPartyTransactions Related Party Transactions Notes 13 false false R14.htm 100130 - Disclosure - Preferred Stock and Stockholders' Equity Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquity Preferred Stock and Stockholders' Equity Notes 14 false false R15.htm 100140 - Disclosure - Net Income (Loss) Per Share Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureNetIncomeLossPerShare Net Income (Loss) Per Share Notes 15 false false R16.htm 100150 - Disclosure - Income Taxes Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxes Income Taxes Notes 16 false false R17.htm 100160 - Disclosure - Commitments and contingencies Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureCommitmentsAndContingencies Commitments and contingencies Notes 17 false false R18.htm 100170 - Disclosure - Quarterly Financial Data (Unaudited) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureQuarterlyFinancialDataUnaudited Quarterly Financial Data (Unaudited) Notes 18 false false R19.htm 100180 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Policies) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies Basis of Presentation and Summary of Significant Accounting Policies (Policies) Policies http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies 19 false false R20.htm 100190 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables Basis of Presentation and Summary of Significant Accounting Policies (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies 20 false false R21.htm 100200 - Disclosure - Fair Value of Financial Instruments (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsTables Fair Value of Financial Instruments (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosureFairValueOfFinancialInstruments 21 false false R22.htm 100210 - Disclosure - Composition of Certain Balance Sheet Items (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItemsTables Composition of Certain Balance Sheet Items (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItems 22 false false R23.htm 100220 - Disclosure - Debt Obligation (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureDebtObligationTables Debt Obligation (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosureDebtObligation 23 false false R24.htm 100230 - Disclosure - Lease Obligations (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureLeaseObligationsTables Lease Obligations (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosureLeaseObligation 24 false false R25.htm 100240 - Disclosure - Preferred Stock and Stockholders' Equity (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquityTables Preferred Stock and Stockholders' Equity (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquity 25 false false R26.htm 100250 - Disclosure - Net Income (Loss) Per Share (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureNetIncomeLossPerShareTables Net Income (Loss) Per Share (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosureNetIncomeLossPerShare 26 false false R27.htm 100260 - Disclosure - Income Taxes (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesTables Income Taxes (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxes 27 false false R28.htm 100270 - Disclosure - Quarterly Financial Data (Unaudited) (Tables) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureQuarterlyFinancialDataUnauditedTables Quarterly Financial Data (Unaudited) (Tables) Tables http://www.corcept.com/20171231/taxonomy/role/DisclosureQuarterlyFinancialDataUnaudited 28 false false R29.htm 100280 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesNarrativeDetails Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables 29 false false R30.htm 100290 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Summary of Allowance Activity Included in Trade Receivables Includes Allowance for Doubtful Accounts, Prompt Pay Cash Discounts and Chargebacks) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesSummaryOfAllowanceActivityIncludedInTradeReceivablesIncludesAllowanceForDoubtfulAccountsPromptPayCashDiscountsAndChargebacksDetails Basis of Presentation and Summary of Significant Accounting Policies (Summary of Allowance Activity Included in Trade Receivables Includes Allowance for Doubtful Accounts, Prompt Pay Cash Discounts and Chargebacks) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables 30 false false R31.htm 100300 - Disclosure - Significant Agreements (Narrative) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureSignificantAgreementsNarrativeDetails Significant Agreements (Narrative) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureSignificantAgreements 31 false false R32.htm 100310 - Disclosure - Fair Value of Financial Instruments (Narrative) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsNarrativeDetails Fair Value of Financial Instruments (Narrative) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsTables 32 false false R33.htm 100320 - Disclosure - Fair Value of Financial Instruments (Schedule of Available-for-Sale Securities) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsScheduleOfAvailableForSaleSecuritiesDetails Fair Value of Financial Instruments (Schedule of Available-for-Sale Securities) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsTables 33 false false R34.htm 100330 - Disclosure - Composition of Certain Balance Sheet Items (Composition of Inventory) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItemsCompositionOfInventoryDetails Composition of Certain Balance Sheet Items (Composition of Inventory) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItemsTables 34 false false R35.htm 100350 - Disclosure - Composition of Certain Balance Sheet Items (Property and Equipment) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItemsPropertyAndEquipmentDetails Composition of Certain Balance Sheet Items (Property and Equipment) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItemsTables 35 false false R36.htm 100360 - Disclosure - Composition of Certain Balance Sheet Items (Other Accrued Liabilities) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItemsOtherAccruedLiabilitiesDetails Composition of Certain Balance Sheet Items (Other Accrued Liabilities) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureCompositionOfCertainBalanceSheetItemsTables 36 false false R37.htm 100370 - Disclosure - Debt Obligation (Narrative) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureDebtObligationNarrativeDetails Debt Obligation (Narrative) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureDebtObligationTables 37 false false R38.htm 100380 - Disclosure - Debt Obligation (Summary of Payment Obligations under Financing Agreement) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureDebtObligationSummaryOfPaymentObligationsUnderFinancingAgreementDetails Debt Obligation (Summary of Payment Obligations under Financing Agreement) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureDebtObligationTables 38 false false R39.htm 100390 - Disclosure - Lease Obligations (Narratives) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureLeaseObligationsNarrativesDetails Lease Obligations (Narratives) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureLeaseObligationsTables 39 false false R40.htm 100400 - Disclosure - Lease Obligations (Schedule of Future Minimum Lease Payments under Non-Cancelable Operating Leases) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureLeaseObligationsScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetails Lease Obligations (Schedule of Future Minimum Lease Payments under Non-Cancelable Operating Leases) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureLeaseObligationsTables 40 false false R41.htm 100410 - Disclosure - Preferred Stock and Stockholders' Equity (Narrative) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquityNarrativeDetails Preferred Stock and Stockholders' Equity (Narrative) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquityTables 41 false false R42.htm 100420 - Disclosure - Preferred Stock and Stockholders' Equity (Shares of Common Stock Reserved for Future Issuance) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquitySharesOfCommonStockReservedForFutureIssuanceDetails Preferred Stock and Stockholders' Equity (Shares of Common Stock Reserved for Future Issuance) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquityTables 42 false false R43.htm 100430 - Disclosure - Preferred Stock and Stockholders' Equity (Summary of Stock Plan Activity) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquitySummaryOfStockPlanActivityDetails Preferred Stock and Stockholders' Equity (Summary of Stock Plan Activity) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquityTables 43 false false R44.htm 100440 - Disclosure - Preferred Stock and Stockholders' Equity (Summary of Options Outstanding and Exercisable) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquitySummaryOfOptionsOutstandingAndExercisableDetails Preferred Stock and Stockholders' Equity (Summary of Options Outstanding and Exercisable) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquityTables 44 false false R45.htm 100450 - Disclosure - Preferred Stock and Stockholders' Equity (Summary of Weighted-Average Assumptions and Resultant Fair Value-Based Measurements for Options Granted to Employees and Directors) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquitySummaryOfWeightedAverageAssumptionsAndResultantFairValueBasedMeasurementsForOptionsGrantedToEmployeesAndDirectorsDetails Preferred Stock and Stockholders' Equity (Summary of Weighted-Average Assumptions and Resultant Fair Value-Based Measurements for Options Granted to Employees and Directors) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquityTables 45 false false R46.htm 100460 - Disclosure - Preferred Stock and Stockholders' Equity (Summary of Stock-Based Compensation) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquitySummaryOfStockBasedCompensationDetails Preferred Stock and Stockholders' Equity (Summary of Stock-Based Compensation) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosurePreferredStockAndStockholdersEquityTables 46 false false R47.htm 100470 - Disclosure - Schedule of Computation of Net Income (Loss) Per Share (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureScheduleOfComputationOfNetIncomeLossPerShareDetails Schedule of Computation of Net Income (Loss) Per Share (Details) Details 47 false false R48.htm 100480 - Disclosure - Net Income (Loss) Per Share (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureNetIncomeLossPerShareDetails Net Income (Loss) Per Share (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureNetIncomeLossPerShareTables 48 false false R49.htm 100490 - Disclosure - Net Income (Loss) Per Share (Securities Outstanding that could Potentially Dilute Per Share Data) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureNetIncomeLossPerShareSecuritiesOutstandingThatCouldPotentiallyDilutePerShareDataDetails Net Income (Loss) Per Share (Securities Outstanding that could Potentially Dilute Per Share Data) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureNetIncomeLossPerShareTables 49 false false R50.htm 100500 - Disclosure - Income Taxes (Components of Income Tax (Benefit)) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxBenefitDetails Income Taxes (Components of Income Tax (Benefit)) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesTables 50 false false R51.htm 100510 - Disclosure - Income Taxes - (Narrative) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesNarrativeDetails Income Taxes - (Narrative) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesTables 51 false false R52.htm 100520 - Disclosure - Income Taxes (Significant Components of Deferred Tax Assets) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesSignificantComponentsOfDeferredTaxAssetsDetails Income Taxes (Significant Components of Deferred Tax Assets) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesTables 52 false false R53.htm 100530 - Disclosure - Income Taxes (Reconciliation of Statutory Federal Income Tax Rate to Effective Rate) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfStatutoryFederalIncomeTaxRateToEffectiveRateDetails Income Taxes (Reconciliation of Statutory Federal Income Tax Rate to Effective Rate) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesTables 53 false false R54.htm 100540 - Disclosure - Income Taxes (Changes in Balance of Gross Unrecognized Tax Benefits) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesChangesInBalanceOfGrossUnrecognizedTaxBenefitsDetails Income Taxes (Changes in Balance of Gross Unrecognized Tax Benefits) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureIncomeTaxesTables 54 false false R55.htm 100550 - Disclosure - Commitments and contingencies (Narratives) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureCommitmentsAndContingenciesNarrativesDetails Commitments and contingencies (Narratives) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureCommitmentsAndContingencies 55 false false R56.htm 100560 - Disclosure - Quarterly Financial Data (Unaudited) (Details) Sheet http://www.corcept.com/20171231/taxonomy/role/DisclosureQuarterlyFinancialDataUnauditedDetails Quarterly Financial Data (Unaudited) (Details) Details http://www.corcept.com/20171231/taxonomy/role/DisclosureQuarterlyFinancialDataUnauditedTables 56 false false All Reports Book All Reports cort-20171231.xml cort-20171231.xsd cort-20171231_cal.xml cort-20171231_def.xml cort-20171231_lab.xml cort-20171231_pre.xml http://xbrl.sec.gov/dei/2014-01-31 http://fasb.org/us-gaap/2017-01-31 true true