Document and Entity Information Statement [Table] Statement [Line Items] Statement Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus CONDENSED CONSOLIDATED BALANCE SHEETS Assets [Abstract] Assets Assets, Current [Abstract] Current assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Accounts Receivable, Net, Current Accounts receivable Inventory, Net Inventory Total inventory Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net Intangible Assets, Net (Including Goodwill) Intangible assets, net Restricted Cash and Cash Equivalents, Noncurrent Restricted cash Other Assets, Noncurrent Other long-term assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and shareholders' equity Liabilities, Current [Abstract] Current liabilities Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued expenses Total accrued expenses Carrying value as of the balance sheet date of obligations incurred through that date and payable for rebates, returns and discounts. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Rebates Returns and Discounts Current Accrued rebates, returns and discounts Business Combination, Contingent Consideration, Liability, Current Current portion of asset acquisition obligations Loans Payable, Current Current portion of term loan payable Liabilities, Current Total current liabilities Business Combination, Contingent Consideration, Liability, Noncurrent Asset acquisition obligations, long-term Loans Payable, Noncurrent Term loan payable, long-term Liabilities Total liabilities Commitments and Contingencies, Amount Commitments and contingencies (see Note 12) Stockholders' Equity Attributable to Parent [Abstract] Shareholders' equity: Preferred Stock, Value, Issued Preferred stock, $0.001 par value; authorized shares - 5,000,000 at March 31, 2018 and December 31, 2017; issued and outstanding shares - none at March 31, 2018 and December 31, 2017 Common Stock, Value, Issued Common stock, $0.001 par value; authorized shares - 100,000,000 at March 31, 2018 and December 31, 2017; issued and outstanding shares - 33,027,579 at March 31, 2018 and 32,770,678 at December 31, 2017 Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated deficit Stockholders' Equity Attributable to Parent Balance at end of period Balance at beginning of period Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, authorized shares Preferred Stock, Shares Issued Preferred stock, issued shares Preferred Stock, Shares Outstanding Preferred stock, outstanding shares Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, authorized shares Common Stock, Shares, Issued Common stock, issued shares Common Stock, Shares, Outstanding Common stock, outstanding shares CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Revenues [Abstract] Revenues Revenue from Contract with Customer, Excluding Assessed Tax Product revenues, net Operating Expenses [Abstract] Costs and expenses Cost of Goods and Services Sold Cost of product revenues Research and Development Expense Research and development Selling, General and Administrative Expense Selling, general and administrative Costs and Expenses Total costs and expenses Operating Income (Loss) Loss from operations Interest Expense Interest expense Investment Income, Net Interest income Net Income (Loss) Attributable to Parent Net loss Net loss Earnings Per Share, Basic and Diluted Loss per share - basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Weighted-average number of common shares used in net loss per share - basic and diluted Weighted-average shares - basic and diluted CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Depreciation Depreciation expense Amortization Amortization expense This element represents the amortization of the deferred credit for an incentive or inducement received by a lessee from a lessor, in order to motivate the lessee to enter the lease agreement, amortized over the term of the lease. Amortization of Incentive from Lessor Lease incentive obligation Share-based Compensation Stock-based compensation expense Paid-in-Kind Interest Non-cash interest expense Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued expenses The increase (decrease) during the reporting period in the aggregate amount of rebates, returns and discounts incurred but not yet paid. Increase Decrease in Accrued Rebates Returns and Discounts Accrued rebates, returns and discounts Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable. Increase (Decrease) in Contract with Customer, Liability Deferred revenue Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Investing activities Payments to Acquire Businesses, Gross Cash paid for asset acquisition Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Financing activities Payments of Stock Issuance Costs Cash paid for common stock offerings costs Cash paid for common stock offerings costs Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options Proceeds from issuances of common stock from employee stock purchase plans Proceeds from (Repayments of) Notes Payable Proceeds from term loan amendment, net of repayment of amended term loan Payment for Contingent Consideration Liability, Financing Activities Repayment of asset acquisition obligations Repayments of Long-term Debt Repayment of term note Proceeds from Stock Options Exercised Proceeds from the exercise of stock options Payments Related to Tax Withholding for Share-based Compensation Payments made for employee restricted stock tax withholdings Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Continuing Operations Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Cash, and cash equivalents and restricted cash at end of period Cash, cash equivalents and restricted cash at beginning of period Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information Cash Paid for Offering Costs Cash Paid for Offering Costs Cash paid for offering costs Interest Paid Cash paid for interest Noncash Investing and Financing Items [Abstract] Supplemental disclosure of non-cash activities Accruals of Offering Costs Accruals of Offering Costs Offering costs in accrued expenses Noncash or Part Noncash Acquisition, Fixed Assets Acquired Acquisition of property and equipment in accrued expenses The amount of transaction cost incurred that was accrued but not yet paid out of asset acquisition. Noncash or Part Noncash Acquisition, Transaction Cost Accrued Asset acquisition transaction costs in accrued expenses The amount of debt that an Entity assumes in acquiring an asset or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Noncash or Part Noncash Acquisition, Value of Liabilities Assumed from Asset Acquisition Liabilities assumed from asset acquisition in accrued rebates, returns and discounts Nature of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Nature of Business Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Revenue from Contract with Customer Loss per Common Share Earnings Per Share [Text Block] Loss per Common Share Fair Value of Financial Instruments Fair Value Disclosures Fair Value of Financial Instruments Inventory Inventory Disclosure [Text Block] Inventory No definition available. Intangible Assets and Asset Acquisition Obligations The entire disclosure of intangible assets and asset acquisition obligations. Excludes business combination assets and liabilities and goodwill. Intangible Assets and Asset Acquisition Obligations [Text Block] Intangible Assets and Asset Acquisition Obligations Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses Term Loan Payable Debt Disclosure [Text Block] Term Loan Payable Equity Stockholders' Equity Note Disclosure [Text Block] Equity Stock-based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-based Compensation Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Advertising Cost, Policy, Expensed Advertising Cost [Policy Text Block] Advertising and Product Promotion Costs Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash Lessee, Leases [Policy Text Block] Leases Income Tax, Policy [Policy Text Block] Income Taxes New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Contract with Customer, Asset and Liability [Table Text Block] Summary of product revenue provision and allowance Disaggregation of Revenue [Table Text Block] Schedule of disaggregation of revenue Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of computations of basic and diluted net loss per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of potentially dilutive securities excluded from computations of diluted weighted-average shares outstanding Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Schedule of financial instruments measured at fair value by level within fair value hierarchy Schedule of Inventory, Current [Table Text Block] Schedule of Inventory Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of recognized assets and assuming liabilities Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Carrying amount of Nucynta intangible Tabular disclosure of remaining minimum royalty payments. Schedule of Remaining Minimum Royalty Payments [Table Text Block] Schedule of remaining minimum royalty payments Finite-lived Intangible Assets Amortization Expense [Table Text Block] Summary of amortization expense Schedule of Accrued Liabilities [Table Text Block] Schedule of components of accrued expenses Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of future payments under debt agreements Schedule of Stockholders Equity [Table Text Block] Summary of Changes in Shareholders' Equity Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary of stock-based compensation included in statement of operations Nonvested Restricted Stock Shares Activity [Table Text Block] Summary of restricted stock awards activity Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Summary of restricted stock units activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of stock option activity Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of weighted-average assumptions used in Black-Scholes option-pricing model Stock Issued During Period, Shares, New Issues Public offering of common stock, net of issuance costs (in shares) Shares Issued, Price Per Share Offering price (in dollars per share) Sale of Stock, Consideration Received if Additional Shares are Issued Sale of Stock, Consideration Received if Additional Shares are Issued Sale of Stock, Consideration Received if Additional Shares are Issued Commission Fee on Sale of Stock, Percentage Commission Fee on Sale of Stock, Percentage Commission fee percentage on gross proceeds from sale of ATM shares Sale of Stock, Consideration Received on Transaction Proceeds from the offering, after deducting underwriting discounts and commissions Marketing and Advertising Expense Area of Real Estate Property Square of feet of space Lessee Leasing Arrangements, Operating Leases, Term of Contract Lease term The number of renewal periods available under the lease. Number Of Renewal Periods Operating Lease Number of renewal periods Lessee Leasing Arrangements, Operating Leases, Renewal Term Term of lease extension option Cost of operating lease per rentable square foot. Operating Lease Annual Initial Base Rent Per Square Foot Initial annual base rent The annual increase in base rent, per square foot. Operating Lease Annual Base Rent Increase Per Square Foot Annual increase in base rent (per square foot) Percentage of operating lease increased annually. Operating Lease Annual Base Rent Increase Percentage Increase in annual base rent Contract with Customer, Liability, Revenue Recognized Revenue recognition for product sales Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true/false] Practical expedient incremental cost The amount assumed rebate liability incurred as per the contractual agreement. Assumed Rebate Liability Asset acquisition liabilities assumed in accrued rebates, returns and discounts Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Line Items] Allowance categories Contract with Customer, Liability Balance at End of the period Balance at Beginning of the period Amount of increase (decrease) in contract liability due to change in provision for current period sales. Contract with Customer, Liability, Provision for Current Period Sales Provision related to current period sales Amount of increase (decrease) in contract liability due to change in estimation of prior period sales. Contract with Customer, Liability, Change in Estimate of Prior Period Sales Changes in estimate related to prior period sales Amount of decrease in contract liability due to payments made. Contract with Customer, Liability, Decrease Due to Credits and Payments Credits/payments made Disaggregation of Revenue [Table] Disaggregation of Revenue [Line Items] Disaggregation of Revenue Revenue from Contract with Customer, Including Assessed Tax Revenue Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Net loss per common share Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that basic and dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. Net Income Loss Available To Common Stockholders Basic And Diluted Loss attributable to common shareholders — basic and diluted Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] An arrangement whereby an employee or nonemployee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Nonemployees may include, but are not limited to, consultants and outside members of the board of directors. Employee And Nonemployee Stock Options [Member] Stock options Warrant [Member] Warrants Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive securities Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding Fair Value Measurements, Recurring and Nonrecurring [Table] Cash and Cash Equivalents, Fair Value Disclosure Cash equivalents Royalty Liability Royalty Liability Royalty liability Royalty discount rate used. Royalty discount rate Discount rate used to calculate present value of royalty payments Inventory, Raw Materials, Gross Raw materials Inventory, Work in Process, Gross Work in process Inventory, Finished Goods, Gross Finished goods The amount of upfront consideration paid for asset acquisition. Upfront Cash Paid For Asset Acquisition Upfront cash paid for Nucynta asset acquisition No definition available. Asset Acquired Recognized Identifiable Assets Acquired and Liabilities Assumed [Abstract] Identifiable assets acquired and liabilities assumed: The amount of intangibles recognized as on acquisition date. Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets Intangible assets The amount of inventory recognized as on acquisition date. Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Inventory Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date. Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed, Prepaid Expenses Prepaid expenses The amount of royalty payments made as on acquisition date. Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed, Minimum Royalty Payments Minimum royalty payments Amount of other liabilities assumed at the acquisition date. Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Liabilities Other liabilities Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Total Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Useful life Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization Accumulated amortization Remaining amortization period of acquired asset finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Acquired Finite-Lived Intangible Assets, Remaining Amortization Period Remaining amortization period Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Reminder of 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 Finite-Lived Intangible Assets, Gross Gross carrying amount Finite-Lived Intangible Assets, Net Intangible assets, net Intangible assets, net The amount of minimum royalty should be paid for each year. Minimum Annual Royalty Payments, Liability Annual royalty payable The amount of minimum royalty should be paid for each quarter. Minimum Quarterly Royalty payments, Liability Quarterly royalty payable The amount of minimum royalty should be paid over the period. Minimum Royalty payment Liability Minimum royalty payable The period over which royalty payment should be made from the end of the quarter. Royalty Payment, Period End of Quarter Royalty payment period The amount of fair value of minimum royalty payable. Royalty Payable, Fair Value Fair Value of royalty payments The percentage of rate used to discounted the cash flows of future payments. Discounted Cash Flow, Rate Discounted cash flow rate The amount of discount on royalty which should be recognized over a period. Discount on Royalty Discount The amount of royalty treated as interest expense. Interest Expense Royalty Interest expense The amount of prorated royalty expense due for the period. Prorated Minimum Royalty Payment Royalty payment due before payment Interest Expense Related to Minimum Royalty Payments, Remainder of Fiscal Year Interest Expense Related to Minimum Royalty Payments, Remainder of Fiscal Year Remainder of 2018 Interest Expense Related to Minimum Royalty Payments, Next Twelve Months Interest Expense Related to Minimum Royalty Payments, Next Twelve Months 2019 Interest Expense Related to Minimum Royalty Payments, Due in Two Years Interest Expense Related to Minimum Royalty Payments, Due in Two Years 2020 Interest Expense Related to Minimum Royalty Payments, Due in Three Years Interest Expense Related to Minimum Royalty Payments, Due in Three Years 2021 The amount of quarterly royalty payment made. Payment of Royalty Payment of royalty The amount of quarterly royalty payment due for the period. Quarterly Royalty Payment Due Quarterly payment due The amount of future royalty payments during remainder of fiscal year. Royalty Payable Remainder of Fiscal Year 2018 The amount of future royalty payments in year two. Royalty Payable Year Two 2019 The amount of future royalty payments in year three. Royalty Payable Year Three 2020 The amount of future royalty payments in year four. Royalty Payable Year Four 2021 The amount of minimum royalty payments to be made. Royalty Payment Due Total remaining minimum royalty payments due The remaining amount of unamortized discount on royalty payments. Royalty Payment Unamortized Discount Less: Unamortized discount The amount of net royalty to be paid after adjustment for unamortized discount. Carrying Value of Royalty Payment, Net of Unamortized Discount Carrying value of minimum royalty payments Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets [Line Items] The amount of upfront cash payment made for intangible asset. Upfront Cash Paid Upfront cash payment Impairment of Intangible Assets, Finite-lived Impairment loss Amortization of Intangible Assets Amortization expense Carrying value of balance sheet date of obligations and payables pertaining to accrued cost of product revenues. Accrued cost of product revenues Accrued cost of product revenues Workers' Compensation Liability, Current Accrued incentive compensation Carrying value of balance sheet date of obligations and payables pertaining to accrued inventory. Accrued Inventory Current Accrued inventory Employee-related Liabilities, Current Accrued payroll and related benefits Other Accrued Liabilities, Current Accrued other operating costs Accrued Bonuses, Current Accrued bonuses Accrued Marketing Costs, Current Accrued sales and marketing Accrued Professional Fees, Current Accrued audit and legal Carrying value as of the balance sheet date of obligations incurred through that date and payable for research and development costs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Research and Development Costs, Current Accrued development costs Interest Payable, Current Accrued interest Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Represents the loan agreement with Silicon Valley Bank (SVB) entered into on August 28, 2012. Silicon Valley Bank Loan Agreement28 August2012 [Member] Silicon Valley Bank loan agreement Represents Amendment No. 2 to the loan agreement with Silicon Valley Bank (SVB) entered into in August 2014. Silicon Valley Bank Loan Agreement Amendment Number2 August2014 [Member] Silicon Valley Bank loan agreement Amendment No. 2 Debt Instrument [Line Items] Loan and Security Agreements Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity Debt Instrument, Basis Spread on Variable Rate Variable interest rate margin (as a percent) Debt Instrument, Description of Variable Rate Basis Variable rate basis Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate Interest rate (as a percent) Debt Instrument, Face Amount Original principal amount Represents the threshold limit of EDITDA to repay principal and interest prior to specific date. Threshold Limit of EBITDA to Repay Principal and Accrued Interest Prior to Specific Date Threshold limit of EDITDA to repay principal and interest prior to specific date Represents the number of consecutive calendar quarters to maintain threshold limit of EDITDA to repay principal and interest prior to specific date. Number of Consecutive Calendar Quarters to maintain Threshold Limit of EDITDA to Repay Principal and Accrued Interest Prior to Specific Date Number of consecutive calendar quarters to maintain threshold limit of EDITDA to repay principal and interest prior to specific date The percentage of prepayment fee under debt agreement. Debt Instrument Prepayment Fee Percent Prepayment fee (as a percent) Debt Instrument, Fee Amount Final payment fee Represents the ratio between the liquid assets and the liabilities of an entity under the terms of debt instrument. Debt instrument covenant Liquidity Ratio Minimum liquidity ratio Percentage of interest on outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default. Debt Default Interest Rate Additional interest rate in event of default Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2019 No definition available. Maturities of Debt [Abstract] Future payments under term loan Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Three 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four 2022 Long-term Debt Balance Shares, Outstanding Balance at end of year, shares Balance at beginning of year, shares Stock Issued During Period, Value, Stock Options Exercised Exercise of common stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised Exercise of common stock options, shares Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance for employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance for employee stock purchase plan, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Vesting of restricted stock units, shares Stock Withheld For Employee Taxes Upon Vesting of Restricted Stock Units, Value Stock Withheld For Employee Taxes Upon Vesting of Restricted Stock Units, Value Shares withheld for employee taxes upon vesting of restricted stock units Stock Withheld For Employee Taxes Upon Vesting of Restricted Stock Units, Shares Stock Withheld For Employee Taxes Upon Vesting of Restricted Stock Units, Shares Shares withheld for employee taxes upon vesting of restricted stock units, shares Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation expense Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Unrecognized compensation cost related to outstanding options Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Period over which unrecognized compensation cost is expected to be recognized as expense Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Shares of common stock authorized for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares of common stock remaining available for future grant Represents the additional shares that may be authorized for issuance annually under an established share-based compensation plan, expressed as a percentage of the entity's outstanding shares. Share Based Compensation Arrangement by Share Based Payment Award, Annual Additional Shares Authorized as Percentage of Outstanding Shares Increase in number of authorized shares on the first day of each fiscal year, as a percentage of outstanding common stock (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding Outstanding Shares of common stock authorized for issuance outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Contractual life Period after the date the vested equity-based award expires during which an employee continues to have the right to exercise an award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Share-based Compensation Arrangement by Share-based Payment Award, Award Exercise Period after Expiration Date Period following termination date vested options are exercisable Employee Stock Purchase Plan, Purchase Price Percentage Employee Stock Purchase Plan, Purchase Price Percentage Employee Stock Purchase Plan, Compensation Expense Employee Stock Purchase Plan, Compensation Expense Allocated Share-based Compensation Expense Total stock-based compensation expense Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Restricted stock awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Balance Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested/Settled The number of non-vested equity-based payment instruments, issued in connection with the early exercise of stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Early Exercise of Stock Options, Number Unvested remaining from the early exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted-average purchase price per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Balance Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested/Settled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Stock option activity Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Cancelled Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Vested and expected to vest at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted average exercise price per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Outstanding Outstanding Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Cancelled Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Vested and expected to vest at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Stock option activity, additional information Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding Weighted-Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Outstanding Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable at end of period, Weighted-Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Exercisable at end of period, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Vested and expected to vest at end of period, Weighted-Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Vested and expected to vest at end of period, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Weighted-average assumptions used in the Black-Scholes option pricing model to determine the fair value of the employee stock option grants Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected term (in years) Loss Contingencies [Table] Loss Contingencies [Line Items] Contingencies Represents the stay period before the Federal Drug Administration (FDA) can issue final approval unless the stay is terminated. Loss Contingency, Stay Period before Final Federal Drug Administration Approval can be Issued if Patent Infringement Litigation Elected Stay period before FDA can issue a final approval unless it is terminated Number of another entity's Orange Book patents that the entity has allegedly infringed. Loss Contingency Orange Book Patents Allegedly Infringed Number Total number of Orange Book patents asserted to have been infringed Number of another entity's non-Orange Book patents that the entity has allegedly infringed. Loss Contingency Non Orange Book Patents Allegedly Infringed Number Total number of non-Orange Book patents asserted to have been infringed Loss Contingency, Patents Allegedly Infringed, Number Number of patents asserted infringed Number of patents listed in FDA Orange Book Number of patents listed in FDA Orange Book Range [Axis] Range [Member] Range [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Valuation Allowances and Reserves Type [Axis] Valuation Allowances And Reserves [Domain] Valuation Allowances and Reserves [Domain] A valuation allowance for rebates and incentives that the entity expects to be uncollectible. Allowance For Rebates And Incentives [Member] Rebates and Incentives The definition is: Liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer. Contract With Customer Refund Liability [Member] Product Returns A valuation allowance and chargebacks for trade receivables that the entity expects to be uncollectible. Allowance And Chargebacks For Trade Receivables [Member] Trade Allowances and Chargebacks Products and Services [Axis] Products And Services [Domain] Products and Services [Domain] Represents the information pertaining to Xtampza. Xtampza [Member] Xtampza Represents the information pertaining to Nucynta. Nucynta [Member] Nucynta Unvested Restricted Stock [Member] Unvested Restricted Stock [Member] Unvested restricted stock Restricted Stock Units R S U [Member] Restricted stock units Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value Inputs Level1 [Member] Quoted Prices in active markets (Level 1) Cash and Cash Equivalents [Axis] Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member] Cash and Cash Equivalents [Domain] Money Market Funds [Member] Money market funds Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Licensing Agreements [Member] Commercialization Agreement - Nucynta [Member] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Selling General And Administrative Expenses [Member] Selling, general and administrative expenses Onsolis [Member] Onsolis [Member] Onsolis Cost Of Sales [Member] Cost of product revenues Scenario [Axis] Scenario Unspecified [Domain] Scenario, Unspecified [Domain] Represents information prior to first anniversary. Prior To First Anniversary [Member] Prior to first anniversary Represents information between first anniversary and second anniversary. Between First Anniversary And Second Anniversary [Member] Between first anniversary and second anniversary Represents information following second anniversary. Following Second Anniversary [Member] Following second anniversary Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Letter Of Credit [Member] Standby letter of credit Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Notes Payable To Banks [Member] Term loan Represents information pertaining to new term loan facility. New Term Loan Facility [Member] New Term Loan Represents the consent and sixth amendment agreement with Silicon Valley Bank (SVB). Silicon Valley Bank Loan Agreement Consent And Sixth Amendment [Member] Silicon Valley Bank Loan Agreement Consent and Sixth Amendment Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Prime Rate [Member] Prime Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid In Capital [Member] Additional Paid-In Capital Retained Earnings [Member] Accumulated Deficit Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Represents the 2014 Stock Incentive Plan (the Plan), as amended. Stock Incentive Plan2014 [Member] 2014 Stock Incentive Plan Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time and share instrument which is convertible to stock or an equivalent amount of cash until specified performance conditions are met. Restricted Stock And Restricted Stock Units [Member] Restricted Stock Awards And Restricted Stock Units Research And Development Expense [Member] Research and development expenses Restricted Stock [Member] Restricted Stock Awards Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case [Domain] Represents the suit filed against the entity by Purdue Pharma, L.P. in the District of Delaware asserting patent infringement. Purdue Pharma Limited Partnership Patent Infringement District Of Delaware [Member] Purdue Pharma, L. P. patent infringement suit, District of Delaware Teva Litigation [member] Teva Litigation [Member] Teva Litigation [member] Represents the information about Xtampza litigation. Xtampza Litigation [Member] Xtampza Litigation