3.8.0.1 html 85 274 1 false 38 0 false 7 false false R1.htm 00090 - Document - Document and Entity Information Sheet http://www.collegiumpharma.com/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00100 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS Sheet http://www.collegiumpharma.com/role/StatementCondensedConsolidatedBalanceSheets CONDENSED CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 00105 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.collegiumpharma.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 3 false false R4.htm 00200 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Sheet http://www.collegiumpharma.com/role/StatementCondensedConsolidatedStatementsOfOperations CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Statements 4 false false R5.htm 00400 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.collegiumpharma.com/role/StatementCondensedConsolidatedStatementsOfCashFlows CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 5 false false R6.htm 10101 - Disclosure - Nature of Business Sheet http://www.collegiumpharma.com/role/DisclosureNatureOfBusiness Nature of Business Notes 6 false false R7.htm 10201 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.collegiumpharma.com/role/DisclosureSummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 7 false false R8.htm 10301 - Disclosure - Revenue from Contracts with Customers Sheet http://www.collegiumpharma.com/role/DisclosureRevenueFromContractsWithCustomers Revenue from Contracts with Customers Notes 8 false false R9.htm 10401 - Disclosure - Loss per Common Share Sheet http://www.collegiumpharma.com/role/DisclosureLossPerCommonShare Loss per Common Share Notes 9 false false R10.htm 10501 - Disclosure - Fair Value of Financial Instruments Sheet http://www.collegiumpharma.com/role/DisclosureFairValueOfFinancialInstruments Fair Value of Financial Instruments Notes 10 false false R11.htm 10601 - Disclosure - Inventory Sheet http://www.collegiumpharma.com/role/DisclosureInventory Inventory Notes 11 false false R12.htm 10701 - Disclosure - Intangible Assets and Asset Acquisition Obligations Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligations Intangible Assets and Asset Acquisition Obligations Notes 12 false false R13.htm 10801 - Disclosure - Accrued Expenses Sheet http://www.collegiumpharma.com/role/DisclosureAccruedExpenses Accrued Expenses Notes 13 false false R14.htm 10901 - Disclosure - Term Loan Payable Sheet http://www.collegiumpharma.com/role/DisclosureTermLoanPayable Term Loan Payable Notes 14 false false R15.htm 11001 - Disclosure - Equity Sheet http://www.collegiumpharma.com/role/DisclosureEquity Equity Notes 15 false false R16.htm 11101 - Disclosure - Stock-based Compensation Sheet http://www.collegiumpharma.com/role/DisclosureStockBasedCompensation Stock-based Compensation Notes 16 false false R17.htm 11201 - Disclosure - Commitments and Contingencies Sheet http://www.collegiumpharma.com/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 17 false false R18.htm 20202 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.collegiumpharma.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.collegiumpharma.com/role/DisclosureSummaryOfSignificantAccountingPolicies 18 false false R19.htm 30303 - Disclosure - Revenue from Contracts with Customers (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureRevenueFromContractsWithCustomersTables Revenue from Contracts with Customers (Tables) Tables http://www.collegiumpharma.com/role/DisclosureRevenueFromContractsWithCustomers 19 false false R20.htm 30403 - Disclosure - Loss per Common Share (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureLossPerCommonShareTables Loss per Common Share (Tables) Tables http://www.collegiumpharma.com/role/DisclosureLossPerCommonShare 20 false false R21.htm 30503 - Disclosure - Fair Value of Financial Instruments (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureFairValueOfFinancialInstrumentsTables Fair Value of Financial Instruments (Tables) Tables http://www.collegiumpharma.com/role/DisclosureFairValueOfFinancialInstruments 21 false false R22.htm 30603 - Disclosure - Inventory (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureInventoryTables Inventory (Tables) Tables http://www.collegiumpharma.com/role/DisclosureInventory 22 false false R23.htm 30703 - Disclosure - Intangible Assets and Asset Acquisition Obligations (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligationsTables Intangible Assets and Asset Acquisition Obligations (Tables) Tables http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligations 23 false false R24.htm 30803 - Disclosure - Accrued Expenses (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureAccruedExpensesTables Accrued Expenses (Tables) Tables http://www.collegiumpharma.com/role/DisclosureAccruedExpenses 24 false false R25.htm 30903 - Disclosure - Term Loan Payable (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureTermLoanPayableTables Term Loan Payable (Tables) Tables http://www.collegiumpharma.com/role/DisclosureTermLoanPayable 25 false false R26.htm 31003 - Disclosure - Equity (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureEquityTables Equity (Tables) Tables http://www.collegiumpharma.com/role/DisclosureEquity 26 false false R27.htm 31103 - Disclosure - Stock-based Compensation (Tables) Sheet http://www.collegiumpharma.com/role/DisclosureStockBasedCompensationTables Stock-based Compensation (Tables) Tables http://www.collegiumpharma.com/role/DisclosureStockBasedCompensation 27 false false R28.htm 40101 - Disclosure - Nature of Business (Details) Sheet http://www.collegiumpharma.com/role/DisclosureNatureOfBusinessDetails Nature of Business (Details) Details http://www.collegiumpharma.com/role/DisclosureNatureOfBusiness 28 false false R29.htm 40201 - Disclosure - Summary of Significant Accounting Policies - Narrative (Details) Sheet http://www.collegiumpharma.com/role/DisclosureSummaryOfSignificantAccountingPoliciesNarrativeDetails Summary of Significant Accounting Policies - Narrative (Details) Details 29 false false R30.htm 40301 - Disclosure - Revenue from Contracts with Customers - Narrative (Details) Sheet http://www.collegiumpharma.com/role/DisclosureRevenueFromContractsWithCustomersNarrativeDetails Revenue from Contracts with Customers - Narrative (Details) Details 30 false false R31.htm 40302 - Disclosure - Revenue from Contracts with Customers - contract liabilities (Details) Sheet http://www.collegiumpharma.com/role/DisclosureRevenueFromContractsWithCustomersContractLiabilitiesDetails Revenue from Contracts with Customers - contract liabilities (Details) Details 31 false false R32.htm 40303 - Disclosure - Revenue from Contracts with Customers - Disaggregation of Revenue (Details) Sheet http://www.collegiumpharma.com/role/DisclosureRevenueFromContractsWithCustomersDisaggregationOfRevenueDetails Revenue from Contracts with Customers - Disaggregation of Revenue (Details) Details 32 false false R33.htm 40401 - Disclosure - Loss per Common Share - Computation of Earnings per Share (Details) Sheet http://www.collegiumpharma.com/role/DisclosureLossPerCommonShareComputationOfEarningsPerShareDetails Loss per Common Share - Computation of Earnings per Share (Details) Details 33 false false R34.htm 40402 - Disclosure - Loss per Common Share - Summary of Potentially Dilutive Securities (Details) Sheet http://www.collegiumpharma.com/role/DisclosureLossPerCommonShareSummaryOfPotentiallyDilutiveSecuritiesDetails Loss per Common Share - Summary of Potentially Dilutive Securities (Details) Details 34 false false R35.htm 40501 - Disclosure - Fair Value of Financial Instruments (Details) Sheet http://www.collegiumpharma.com/role/DisclosureFairValueOfFinancialInstrumentsDetails Fair Value of Financial Instruments (Details) Details http://www.collegiumpharma.com/role/DisclosureFairValueOfFinancialInstrumentsTables 35 false false R36.htm 40601 - Disclosure - Inventory (Details) Sheet http://www.collegiumpharma.com/role/DisclosureInventoryDetails Inventory (Details) Details http://www.collegiumpharma.com/role/DisclosureInventoryTables 36 false false R37.htm 40701 - Disclosure - Intangible Assets and Asset Acquisition Obligations - Recognized at cost component of intangible assets (Details) Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligationsRecognizedAtCostComponentOfIntangibleAssetsDetails Intangible Assets and Asset Acquisition Obligations - Recognized at cost component of intangible assets (Details) Details 37 false false R38.htm 40702 - Disclosure - Intangible Assets and Asset Acquisition Obligations - Amortization expense for Nucynta Intangible Asset (Details) Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligationsAmortizationExpenseForNucyntaIntangibleAssetDetails Intangible Assets and Asset Acquisition Obligations - Amortization expense for Nucynta Intangible Asset (Details) Details 38 false false R39.htm 40703 - Disclosure - Intangible Assets and Asset Acquisition Obligations - Gross carrying amount and accumulated amortization (Details) Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligationsGrossCarryingAmountAndAccumulatedAmortizationDetails Intangible Assets and Asset Acquisition Obligations - Gross carrying amount and accumulated amortization (Details) Details 39 false false R40.htm 40704 - Disclosure - Intangible Assets and Asset Acquisition Obligations - Nucynta Asset Acquisition Obligations (Details) Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligationsNucyntaAssetAcquisitionObligationsDetails Intangible Assets and Asset Acquisition Obligations - Nucynta Asset Acquisition Obligations (Details) Details 40 false false R41.htm 40705 - Disclosure - Intangible Assets and Asset Acquisition Obligations - Remaining minimum royalty payments (Details) Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligationsRemainingMinimumRoyaltyPaymentsDetails Intangible Assets and Asset Acquisition Obligations - Remaining minimum royalty payments (Details) Details 41 false false R42.htm 40706 - Disclosure - Intangible Assets and Asset Acquisition Obligations - Onsolis Intangible Asset (Details) Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligationsOnsolisIntangibleAssetDetails Intangible Assets and Asset Acquisition Obligations - Onsolis Intangible Asset (Details) Details 42 false false R43.htm 40707 - Disclosure - Intangible Assets and Asset Acquisition Obligations - Amortization Expense for Onsolis Intangible Asset (Details) Sheet http://www.collegiumpharma.com/role/DisclosureIntangibleAssetsAndAssetAcquisitionObligationsAmortizationExpenseForOnsolisIntangibleAssetDetails Intangible Assets and Asset Acquisition Obligations - Amortization Expense for Onsolis Intangible Asset (Details) Details 43 false false R44.htm 40801 - Disclosure - Accrued Expenses (Details) Sheet http://www.collegiumpharma.com/role/DisclosureAccruedExpensesDetails Accrued Expenses (Details) Details http://www.collegiumpharma.com/role/DisclosureAccruedExpensesTables 44 false false R45.htm 40901 - Disclosure - Term Loan Payable (Details) Sheet http://www.collegiumpharma.com/role/DisclosureTermLoanPayableDetails Term Loan Payable (Details) Details http://www.collegiumpharma.com/role/DisclosureTermLoanPayableTables 45 false false R46.htm 40902 - Disclosure - Term Loan Payable - Future Payments (Details) Sheet http://www.collegiumpharma.com/role/DisclosureTermLoanPayableFuturePaymentsDetails Term Loan Payable - Future Payments (Details) Details 46 false false R47.htm 41001 - Disclosure - Equity - Changes in Shareholders' Equity (Details) Sheet http://www.collegiumpharma.com/role/DisclosureEquityChangesInShareholdersEquityDetails Equity - Changes in Shareholders' Equity (Details) Details 47 false false R48.htm 41101 - Disclosure - Stock-based Compensation - Narrative (Details) Sheet http://www.collegiumpharma.com/role/DisclosureStockBasedCompensationNarrativeDetails Stock-based Compensation - Narrative (Details) Details 48 false false R49.htm 41102 - Disclosure - Stock-based Compensation - Summary of Stock-Based Compensation Included in Statement of Operations (Details) Sheet http://www.collegiumpharma.com/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationIncludedInStatementOfOperationsDetails Stock-based Compensation - Summary of Stock-Based Compensation Included in Statement of Operations (Details) Details 49 false false R50.htm 41103 - Disclosure - Stock-based Compensation - Summary of Restricted Stock Award Activity (Details) Sheet http://www.collegiumpharma.com/role/DisclosureStockBasedCompensationSummaryOfRestrictedStockAwardActivityDetails Stock-based Compensation - Summary of Restricted Stock Award Activity (Details) Details 50 false false R51.htm 41104 - Disclosure - Stock-based Compensation - Summary of Restricted Stock Units Activity (Details) Sheet http://www.collegiumpharma.com/role/DisclosureStockBasedCompensationSummaryOfRestrictedStockUnitsActivityDetails Stock-based Compensation - Summary of Restricted Stock Units Activity (Details) Details 51 false false R52.htm 41105 - Disclosure - Stock-based Compensation - Summary of Stock Option Activity (Details) Sheet http://www.collegiumpharma.com/role/DisclosureStockBasedCompensationSummaryOfStockOptionActivityDetails Stock-based Compensation - Summary of Stock Option Activity (Details) Details 52 false false R53.htm 41106 - Disclosure - Stock-based Compensation - Summary of Valuation Assumptions Used (Details) Sheet http://www.collegiumpharma.com/role/DisclosureStockBasedCompensationSummaryOfValuationAssumptionsUsedDetails Stock-based Compensation - Summary of Valuation Assumptions Used (Details) Details 53 false false R54.htm 41201 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.collegiumpharma.com/role/DisclosureCommitmentsAndContingenciesDetails Commitments and Contingencies (Details) Details http://www.collegiumpharma.com/role/DisclosureCommitmentsAndContingencies 54 false false All Reports Book All Reports coll-20180331.xml coll-20180331.xsd coll-20180331_cal.xml coll-20180331_def.xml coll-20180331_lab.xml coll-20180331_pre.xml http://fasb.org/us-gaap/2017-01-31 http://xbrl.sec.gov/dei/2014-01-31 true true