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Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Issued stock (in shares) Sale of Stock, Number of Shares Issued in Transaction Common stock purchasable under prefunded warrants (in shares) Common Stock Purchasable Under Prefunded Warrants Common Stock Purchasable Under Prefunded Warrants Percentage of revenue interests payment on which agreement terminates, after the third anniversary of the closing date, if put option is exercised Percentage Of Revenue Interests Payment on Which Agreement Terminates After the Third Anniversary Of Closing Date If Put Option Is Exercised Percentage of revenue interests payment on which agreement terminates, after the third anniversary of the closing date, if put option is exercised. Milestone payment, first JNDA submissions Future Payment Milestone, First Submission of Japanese New Drug Application, Otsuka Territory The amount of a potential future payment which becomes due with the submission of a Japanese New Drug Application (JNDA). in the Otsuka Territory. 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Property and Equipment Property, Plant and Equipment [Line Items] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Restatement Determination Date Restatement Determination Date Counterparty Name [Domain] Counterparty Name [Domain] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash, cash equivalents and restricted cash at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Underwritten Public Offering Commitment Offering Commitment Offering [Member] Commitment Offering 2025 Lessee, Operating Lease, Liability, to be Paid, Year Two Debt instrument, fair value disclosure Debt Instrument, Fair Value Disclosure Interest income on investments Investment Income, Interest Price per share (in dollars per share) Sale of Stock, Price Per Share Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Operating lease costs Operating Lease, Cost Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Common stock, shares issued (in shares) Common Stock, Shares, Issued Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Schedule of Company's Cash Equivalents and Investments Unrealized Gain (Loss) on Investments [Table Text Block] Deferred revenue from collaborations Contract with Customer, Liability, Current Schedule of Weighted-Average Assumptions Used to Compute the Stock-Based Compensation Costs for the Stock Options Granted to Employees Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Treasury stock, at cost; 1,994,198 shares at December 31, 2023 and December 31, 2022 Treasury Stock, Common, Value Security Exchange Name Security Exchange Name Long-term debt Long-Term Debt Total assets at fair value Assets, Fair Value Disclosure Stock-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Net proceeds Proceeds from stock offering, net Sale of Stock, Consideration Received on Transaction Selling, general and administrative Selling, General and Administrative Expense Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Summary of Revenue Interest Liability Activity Schedule of Revenue Interest Liability [Table Text Block] Tabular disclosure of information pertaining to the revenue interest liability. 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Entity Address, Address Line One Entity Address, Address Line One Operating loss carryforwards, subject to expiration Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration Inventories Inventory, Policy [Policy Text Block] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Subsequent Event [Table] Subsequent Event [Table] Stock Compensation Share-Based Payment Arrangement [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Increase in common stock shares reserved and available for issuance, as a percentage of common stock shares outstanding Share Based Compensation Arrangement by Share Based Payment Award, Number of Additional Shares Authorized as Percentage of Shares Issued and Outstanding Represents the annual increase in number of shares of stock reserved and available for issuance under a share-based award plan by the specified percentage of the number of shares of stock issued and outstanding on the immediately preceding the end date. Weighted-Average Exercise Price Per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted-Average Remaining Contractual Term (Years) Share Based Compensation Arrangement by Share Based Payment Award Options Weighted Average Remaining Contractual Term [Abstract] Upfront cash payment Up-Front Payment The amount of up-front payment paid. 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Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies Outstanding and unvested at the beginning of period (in dollars per share) Outstanding and unvested at the at the end of the period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Cardiovascular Risk Outcome Less than Twenty Percent Cardiovascular Risk Outcome Greater Than Fifteen But Less Than Twenty Percent [Member] Cardiovascular Risk Outcome Greater Than Fifteen But Less Than Twenty Percent Trading day averaging period Debt Instrument, Exchange Agreement, Convertible, Threshold Trading Days Debt Instrument, Exchange Agreement, Convertible, Threshold Trading Days Number revenue sources Number Of Sources Of Revenue Number Of Sources Of Revenue Remaining redemption amount Revenue Interest Payments, Remaining Redemption Value Revenue Interest Payments, Remaining Redemption Value Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Aggregate principal amount Debt Conversion, Converted Instrument, Amount Option period Sale Of Stock, Underwriter Option Period Sale Of Stock, Underwriter Option Period Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Daiichi Sankyo Co. Ltd Daiichi Sankyo Co. Ltd [Member] Daiichi Sankyo Co. Ltd Entity Tax Identification Number Entity Tax Identification Number Inventories, net Total Inventory Inventory, Net Common stock exchanged (in shares) Debt Conversion, Converted Instrument, Shares Issued Stock based, amount capitalized Share-Based Payment Arrangement, Amount Capitalized Statistical Measurement [Axis] Statistical Measurement [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Cash payment to the Company Cash Payment to be Received upon First Commercial Sales The amount of cash payment to the Company upon the completion of the Nustendi Marketing Authorization Applications Entity Interactive Data Current Entity Interactive Data Current First milestone payment Settlement Agreement Aggregate First Milestone Payment From Partner Settlement Agreement Aggregate First Milestone Payment From Partner Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Transfer of assets between levels Fair Value Measurement Asset Transfers between Levels Represents the transfer of assets between the levels of fair value hierarchy that have taken place during the period. 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Adjustments to reconcile net loss to net cash used in operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Total Shareholder Return Amount Total Shareholder Return Amount Prepayment of forward stock repurchase transaction Payments for Repurchase of Common Stock Product Product [Member] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Inventory Disclosure [Abstract] Stock compensation Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Period from cessation of employment within which options expire if not exercised Share Based Compensation Arrangement by Share Based Payment Award Period from Cessation of Employment within which Options Expire if Not Exercised Represents the period from cessation of employment within which options expire if not exercised. 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These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Provision for income taxes Income Tax Expense (Benefit), Continuing Operations [Abstract] Debt instrument, convertible, conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Debt instrument, convertible, conversion ratio Debt Instrument, Convertible, Conversion Ratio Otsuka Pharmaceutical Co Ltd Otsuka Pharmaceutical Co Ltd [Member] Represents information pertaining to Otsuka Pharmaceutical Co, Ltd. PEO PEO [Member] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Collaborations with Third Parties Collaborations with Third Parties n/a Auditor Location Auditor Location Employee Benefit Plan Retirement Benefits [Text Block] Cost of goods sold Other Cost and Expense, Operating RIPA Amendment To The Security Agreement And Waiver RIPA Amendment To The Security Agreement And Waiver [Member] RIPA Amendment To The Security Agreement And Waiver Cash Equivalents Cash Equivalents [Member] Convertible Senior Notes Due 2025 Convertible Senior Notes Due 2025 [Member] Convertible Senior Notes Due 2025 Net sales threshold Net Sales Threshold To Include Worldwide Sales In Covered Territory Net Sales Threshold To Include Worldwide Sales In Covered Territory Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Debt instrument, convertible, threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Percentage of risk reduction Percentage Of Risk Reduction Percentage Of Risk Reduction Sale of Stock [Axis] Sale of Stock [Axis] Incentive Stock Option And Restricted Stock Plan 2022, 2017 And 2013 Incentive Stock Option And Restricted Stock Plan 2022, 2017 And 2013 [Member] Incentive Stock Option And Restricted Stock Plan 2022, 2017 And 2013 Revenue interest liability Revenue interest liability, beginning balance Revenue interest liability, ending balance Revenue Interest Liability Represents the current and non-current portion of the Revenue Interest Liability. 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Fair Value, Measurement Frequency [Domain] Measurement Frequency [Domain] Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] All Executive Categories All Executive Categories [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Plan Name [Axis] Plan Name [Axis] Debt Disclosure [Abstract] Supplemental balance sheet information related to leases Assets and Liabilities, Lessee [Abstract] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Subsequent Event [Line Items] Subsequent Event [Line Items] Investments Marketable Securities, Policy [Policy Text Block] Number of major customers Concentration Risk, Number of Major Customers The number of the Company's major customers. Common stock, $0.001 par value; 480,000,000 shares authorized as of December 31, 2023 and 240,000,000 shares authorized as of December 31, 2022; 120,204,513 shares issued at December 31, 2023 and 76,564,396 shares issued at December 31, 2022 Common Stock, Value, Issued Debt instrument, redemption price, percentage Debt Instrument, Redemption Price, Percentage Accrued legal fees Accrued Legal Fees, Current Accrued Legal Fees, Current Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Net deferred tax assets, before valuation allowance Deferred Tax Assets, Net Of Deferred Tax Liabilities, Before Valuation Allowance Deferred Tax Assets, Net Of Deferred Tax Liabilities, Before Valuation Allowance Revenue interest liability Revenue Interest Liability, Current Liability related to Revenue Interest Purchase Agreement ("RIPA"), classified as current. Accrued professional fees Accrued Professional Fees, Current Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Hypothetical repayment obligation Hypothetical Repayment Obligation Based On Sales Generated Hypothetical Repayment Obligation Based On Sales Generated Payments on revenue interest liability Revenue interest payments Payments From Revenue Interest Purchase Agreement The cash outflow from a revenue interest purchase agreement. 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Effective annual imputed interest rate (as a percent) Revenue Interest Purchase Agreement, Effective Annual Imputed Interest Rate Represents the percentage of effective annual imputed interest rate under the revenue interest purchase agreement. Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Level 2 Fair Value, Inputs, Level 2 [Member] Entity Emerging Growth Company Entity Emerging Growth Company Debt issuance costs Debt Issuance Costs, Net Revenue Interest Purchase Agreement (RIPA) Revenue Interest Purchase Agreement [Member] Represents the information pertaining to revenue interest purchase agreement ("RIPA"). Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies Liability From Sale Of Future Revenues [Roll Forward] Liability From Sale Of Future Revenues [Roll Forward] Liability From Sale Of Future Revenues Total deferred tax assets Deferred Tax Assets, Gross Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Debt instrument, convertible, threshold trading days Debt Instrument, Convertible, Threshold Trading Days Additional consideration (in dollars per share) Class of Warrant Or Right, Additional Consideration Of Warrants Or Rights Class of Warrant Or Right, Additional Consideration Of Warrants Or Rights 2024 Lessee, Operating Lease, Liability, to be Paid, Year One Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Antidilutive Securities [Axis] Antidilutive Securities [Axis] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Four Purchase discount of employee stock Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date Title Trading Arrangement, Individual Title Outstanding at the beginning of period (in dollars per share) Outstanding at the end of the period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Common Stock Common Stock [Member] Individual: Individual [Axis] City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Net Loss Per Common Share Earnings Per Share [Text Block] Product and Service [Axis] Product and Service [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Time required to pay cash portion Settlement Agreement, Time Required to Pay Cash Portion of Settlement Settlement Agreement, Time Required to Pay Cash Portion of Settlement Property and equipment Property And Equipment [Member] Represents activity related to property and equipment. 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Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Expiration term Warrants and Rights Outstanding, Term Net deferred tax assets Deferred Tax Assets, Net Common Stock And Accompanying Warrant Common Stock And Accompanying Warrant [Member] Common Stock And Accompanying Warrant Warrants exercisable into stock (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Repayment upon execution of Amendment No. 3 Revenue Interest Liability, Repayment Upon Execution Received, Net Of Issuance Costs The amount of repayment in the revenue interest liability related to execution of amendment. Arrangement Duration Trading Arrangement Duration Additional operating and financing leases not yet commenced Number Of Additional Operating And Finance Leases Not Yet Commenced Number Of Additional Operating And Finance Leases Not Yet Commenced Accounts Receivable Risks Accounts Receivable Risks [Member] Accounts Receivable Risks Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Shares delivered to the company (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Principal Executive Office Principal Executive Office [Member] Principal Executive Office Other accrued liabilities Increase (Decrease) in Other Accrued Liabilities Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Second milestone payment Settlement Agreement Aggregate Second Milestone Payment From Partner Settlement Agreement Aggregate Second Milestone Payment From Partner Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Termination Date Trading Arrangement Termination Date Stock Option And Incentive Plan 2022 Stock Option And Incentive Plan 2022 [Member] Stock Option And Incentive Plan 2022 Accrued clinical development costs Accrued Clinical Development Costs, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for clinical development. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle, if longer). Accounts payable Increase (Decrease) in Accounts Payable Common stock, shares authorized (in shares) Common Stock, Shares Authorized Non-cash right of use asset Non Cash Right Of Use Asset Represents the difference between the lease asset and the lease liability. Liability Related to the Revenue Interest Purchase Agreement Liability Related to the Revenue Interest Purchase Agreement No definition. Estimated Fair Value Debt Securities, Available-for-Sale Summary of Income Tax Contingencies Summary of Income Tax Contingencies [Table Text Block] Entity Public Float Entity Public Float Fair value measurements Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Short-term Investments Short-Term Investments [Member] Property and Equipment, Net Property, Plant and Equipment [Abstract] Net Sales Less Than $250 Million Net Sales Threshold One [Member] Net Sales Threshold One Percentage of invested capital received by December 31, 2024, to qualify for second reduced revenue interest rate Percentage of Invested Capital Received By December 31, 2024, To Qualify For Second Reduced Revenue Interest Rate Percentage of invested capital received by December 31, 2024, to qualify for second reduced revenue interest rate. Long-term debt, gross Long-Term Debt, Gross All Trading Arrangements All Trading Arrangements [Member] All Adjustments to Compensation All Adjustments to Compensation [Member] 2013 Stock Option and Incentive Plan Stock Option And Incentive Plan2013 [Member] Represents information pertaining to 2013 Stock Option and Incentive Plan. Award Timing Disclosures [Line Items] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Compensation Amount Outstanding Recovery Compensation Amount Issuance costs not yet paid Common Stock Issuance Costs Incurred, Not Yet Paid Common Stock Issuance Costs Incurred, Not Yet Paid Additional paid-in capital Additional Paid in Capital Deposit if threshold is not met Blocked Account Deposit Amount If Specified Net Revenue Does Not Meet Threshold Blocked Account Deposit Amount If Specified Net Revenue Does Not Meet Threshold Shares issuable upon conversion of convertible notes Convertible Debt Securities [Member] Other comprehensive (loss) gain: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Forfeited or expired (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Vesting of restricted stock units Stock Issued During Period, Value, Restricted Stock Award, Gross Subsequent Event Type [Axis] Subsequent Event Type [Axis] Partner milestone payments Potential Proceeds From Partner Milestone Payments Potential Proceeds From Partner Milestone Payments Proceeds from revenue interest liability Gross Proceeds from Revenue Interest Purchase Agreement The cash inflow from a revenue interest purchase agreement. Convertible Debt Convertible Debt [Member] Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Income Taxes Income Tax, Policy [Policy Text Block] Revenue Interest Liability Revenue Interest Liability [Policy Text Block] Disclosure of accounting policy for recognizing liability associated with the Revenue Interest Purchase Agreement. Other prepaid and current assets Prepaid Expense and Other Assets, Current Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Forfeited or expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Milestone payment, achievement of the primary MACE in the CLEAR Outcomes study and CV risk reduction rate on the U.S. label Future Payment Milestone, Achievement of Drug Trial Outcomes Studies The amount of potential future payment which becomes due with the achievement of the primary MACE in the CLEAR Outcomes study and the CV risk reduction rate on the U.S. label, depending on the range of relative risk reduction in the CLEAR Outcomes study. Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Liability Related to the Revenue Interest Purchase Agreement Liability Related to The Revenue Interest Purchase Agreement [Text Block] The entire disclosure of liabilities related to the Revenue Interest Purchase Agreement entered into by the Company with Eiger III SA LLC ("Oberland"). Insider Trading Arrangements [Line Items] Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Exercise of pre-funded warrants Stock Issued During Period, Value, Pre Funded Warrant Exercises Stock Issued During Period, Value, Pre Funded Warrant Exercises Period One Debt Instrument, Redemption, Period One [Member] Revenue Interest Purchase Agreement Amendment Revenue Interest Purchase Agreement Amendment [Member] Revenue Interest Purchase Agreement Amendment Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Purchase price (in dollars per share) Class of Warrant or Right, Purchase Price Of Warrants Or Rights Class of Warrant or Right, Purchase Price Of Warrants Or Rights Adjustment to Compensation, Amount Adjustment to Compensation Amount Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Auditor Name Auditor Name Document Period End Date Document Period End Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Redemption percentage Revenue Interest Payments, Redemption Percentage Revenue Interest Payments, Redemption Percentage Adoption Date Trading Arrangement Adoption Date Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Schedule of the Company's Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Weighted-Average Exercise Price Per Share, exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Treasury Stock Treasury Stock, Common [Member] Entity Central Index Key Entity Central Index Key Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Amortization of discount and issuance costs on convertible notes Amortization of Debt Issuance Costs and Discounts Organization, Consolidation and Presentation of Financial Statements [Line Items] Organization, Consolidation and Presentation of Financial Statements [Line Items] Organization, Consolidation and Presentation of Financial Statements Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Stock-based compensation expense Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Provision for income taxes Income Tax Expense (Benefit) Finished goods Inventory, Finished Goods, Net of Reserves Permanent items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Income Tax Authority [Domain] Income Tax Authority [Domain] Repayment amount expected to pay in next twelve months Revenue Interest, Repayment Obligation Amount Expected In Next Twelve Months Revenue Interest, Repayment Obligation Amount Expected In Next Twelve Months Fair Value Measurements Fair Value Disclosures [Text Block] Number of operating segments Number of Operating Segments Capitalized research and development Deferred Tax Assets, Tax Deferred Expense, Capitalized Research And Development Deferred Tax Assets, Tax Deferred Expense, Capitalized Research And Development Revenue Benchmark Revenue Benchmark [Member] Name Trading Arrangement, Individual Name Amount of subsequent installment, subject to achievement of Sales Threshold Amount of Subsequent Installment, Subject to Achievement of Sales Threshold The amount of the subsequent installment which is subject to the achievement of the Sales Threshold as defined in the Revenue Interest Purchase Agreement. Other comprehensive gain (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Issuance of common stock from ATM Program, net of issuance costs Stock Issued During Period, Value, New Issues Equity [Abstract] Investments Debt Securities, Available-for-Sale [Line Items] Inventories, net Inventory Disclosure [Text Block] Weighted-average remaining lease term of operating leases Operating Lease, Weighted Average Remaining Lease Term Total Revenues Revenue from Contract with Customer, Excluding Assessed Tax Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Unvested RSUs Unvested Restricted Stock And Restricted Stock Units [Member] Represents information pertaining to unvested restricted stock and restricted stock units. Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Hypothetical sales generated Hypothetical Sales Generated Amount Hypothetical Sales Generated Amount Transfer of liabilities between levels Fair Value Measurement Liability Transfers between Levels Represents the transfer of liabilities between the levels of fair value hierarchy that have taken place during the period. Money market funds Money Market Funds [Member] Tax credit carryforward Tax Credit Carryforward, Amount Royalties on sales Royalty Rate On Net Sales Royalty Rate On Net Sales Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Wainwright Wainwright [Member] Wainwright Shares issued (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Underlying common stock (in shares) Treasury Stock, Shares, Acquired Capped Call Capped Call [Member] Capped Call Estimated useful lives Property, Plant and Equipment, Useful Life Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Leasehold improvements Leasehold Improvements [Member] Selling, General and Administrative Expenses Selling, General and Administrative Expenses, Policy [Policy Text Block] Weighted-average shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Payment to be received upon milestone Cash Payment To Be Received Upon Certain Commercial Milestones Cash Payment To Be Received Upon Certain Commercial Milestones Trade Accounts Receivable Trade Accounts Receivable [Member] Increase in number of commons stock shares available for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized Percentage of revenue interests payment on which agreement terminates after third anniversary Percentage Of Revenue Interests Payment on Which Agreement Terminates Percentage of revenue interests payment on which agreement terminates. Operating expenses: Operating Expenses [Abstract] Milestone payment, first NHI Price Listing for NEXLETOL in the Otsuka Territory Future Payment Milestone, First National Health Insurance Price Listing, Otsuka Territory The amount of a potential future payment which becomes due with the first National Health Insurance price listing for NEXLETOL in the Otsuka Territory. Company Selected Measure Amount Company Selected Measure Amount Oberland Eiger Iii Sa Llc [Member] Represents the information pertaining to revenue interest purchase agreement ("RIPA") with Oberland. Interest Income Interest Income [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Document Annual Report Document Annual Report Audit Information [Abstract] Audit Information [Abstract] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Number of study patients Estimated Number Of Study Patients Estimated Number Of Study Patients Cover [Abstract] Cover [Abstract] Estimated offering expenses Payments for Commissions Period for which remainder of grant amount will vest on the first day of each calendar quarter Share Based Compensation Arrangement by Share Based Payment Award, Award Vesting Period for Remaining Grant Amount Represents the period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition for remaining grant amount. Subsequent Events Subsequent Events [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Recurring fair value measurement Fair Value, Recurring [Member] Other Accrued Liabilities Other Liabilities Disclosure [Text Block] Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] Total lease payments Lessee, Operating Lease, Liability, to be Paid Forfeited or expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Potential one-time cash payment upon milestone Contract With Customer, Liability, One Time Payment, Current Potential one-time cash payments of up to $300 million upon the achievement of certain commercial milestones related to total net sales achievements in the DSE Territory. Short-term investments Short-Term Investments Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) [Member] Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Total operating expenses Operating Expenses Net decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Exercise of pre-funded warrants (in shares) Stock Issued During Period, Shares, Pre Funded Warrant Exercises Stock Issued During Period, Shares, Pre Funded Warrant Exercises Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Proceeds from exercise of pre-funded warrants Proceeds From Pre Funded Warrant Exercises Proceeds From Pre Funded Warrant Exercises State State and Local Jurisdiction [Member] Authorized amount Sale Of Stock, Authorized Amount Sale Of Stock, Authorized Amount Work in process Inventory, Work in Process, Net of Reserves R&D tax credits, net of reserves Deferred Tax Assets, Tax Credit Carryforwards, Research Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] At The Market Program At The Market Program [Member] At The Market Program Non-cash interest expense related to the revenue interest liability Non Cash Interest Expense Related to Revenue Interest Liability The amount of non-cash expense included in interest expense associated with the revenue liability. Other Deferred Tax Liabilities, Other Federal and state operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Debt Instrument [Line Items] Debt Instrument [Line Items] Weighted-average shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Warrants Warrants [Member] Warrants Concentration Risk Type [Domain] Concentration Risk Type [Domain] Loss from operations Operating Income (Loss) Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Period Two Debt Instrument, Redemption, Period Two [Member] Revenues: Revenues [Abstract] Total deferred tax liabilities Deferred Tax Liabilities, Gross Net Sales Threshold [Domain] Net Sales Threshold [Domain] Net Sales Threshold Collaborations with Third Parties Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Statement Statement [Line Items] Net Sales Greater Than $250 Million But Less Than $350 Million Net Sales Threshold Two [Member] Net Sales Threshold Two Property and Equipment, Net Property, Plant and Equipment, Policy [Policy Text Block] Schedule of Nonvested Performance-based Units Activity Schedule of Nonvested Performance-Based Units Activity [Table Text Block] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Cardiovascular Risk Cardiovascular Risk [Member] Cardiovascular Risk Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Minimum amount of annual net sales to qualify for reduced revenue interest rate by December 31, 2021 Minimum Amount of Annual Net Sales To Qualify for Reduced Revenue Interest Rate The minimum amount of annual net sales to qualify for reduced revenue interest rate by December 31, 2021. Warrant Amendment Agreements Warrant Amendment Agreements [Member] Warrant Amendment Agreements Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Prior period adjustments Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis]