Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable, Current Accounts payable Accrued Liabilities and Other Liabilities Accrued compensation and other current liabilities Acquisitions [Table] Acquisitions [Table] Acquisitions [Table] Additional operating lease office space. Additional Operating Lease Office Space Additional area of office space for headquarters facility Additional Paid in Capital, Common Stock Additional paid-in-capital Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss from continuing operations to net cash used in operating activities: Allocated Share-based Compensation Expense Stock-based compensation expense Total stock compensation expense Amendment Flag Amendment Flag Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive securities excluded from computations of diluted weighted-average shares outstanding Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Area of Real Estate Property Area of real estate property (in sqft) Aspire Capital Fund Llc [Member] Aspire Capital Fund Llc [Member] Aspire Capital Fund, LLC [Member] Asset acquisition assumed deferred tax liabilities. Asset Acquisition Assumed Deferred Tax Liabilities Value of deferred tax liability assumed Asset acquisition consideration transferred. Asset Acquisition Consideration Transferred1 Total purchase price consideration Asset acquisition consideration transferred equity interests issued and contingent consideration potentially issuable. Asset Acquisition Consideration Transferred Equity Interests Issued and Contingent Consideration Potentially Issuable Maximum total common stock issuable in acquisition (in shares) Asset acquisition consideration transferred indemnification claims period. Asset Acquisition Consideration Transferred Indemnification Claims Period Indemnification claims period Asset Acquisition Contingent Consideration Arrangements Asset Acquisition Contingent Consideration Arrangements Contingent consideration Maximum potential cash earnout payments Asset acquisition contingent consideration change in fair value. Asset Acquisition Contingent Consideration Change In Fair Value Change in fair value of contingent consideration Asset acquisition contingent consideration liability measurement input. Asset Acquisition Contingent Consideration Liability Measurement Input Fair value inputs, discount rate (percent) Asset acquisition contingent consideration liability milestone potential additional shares issuable. Asset Acquisition Contingent Consideration Liability Milestone Potential Additional Shares Issuable Contingent consideration potential additional shares issuable if milestones are reached (shares) Asset acquisition contingent consideration liability noncurrent. Asset Acquisition Contingent Consideration Liability Noncurrent Contingent liability for Essentialis purchase price Essentialis purchase price contingency liability Asset acquisition fair value of cash consideration. Asset Acquisition Fair Value Of Cash Consideration Fair value of cash consideration Asset acquisition fair value of stock consideration. Asset Acquisition Fair Value Of Stock Consideration Fair value of stock consideration Asset acquisition. Asset Acquisition [Line Items] Asset Acquisition [Line Items] Asset acquisition number of shares issued. Asset Acquisition Number Of Shares Issued Common stock shares issued in acquisition (shares) Asset Acquisitions [Abstract] Asset Acquisitions [Abstract] Asset Acquisitions [Abstract] Asset acquisitions consideration transferred liabilities incurred. Asset Acquisitions Consideration Transferred Liabilities Incurred Amount of financing needed Asset acquisitions. Asset Acquisitions Disclosure [Text Block] Fair Value of Contingent Consideration asset purchase. Asset Purchase [Axis] Asset Purchase [Axis] Asset Purchase [Domain] Asset Purchase [Domain] Asset Purchase [Domain] Assets Total assets Assets [Abstract] Assets Assets, Current Total current assets Assets, Current [Abstract] Current assets Assets, Fair Value Disclosure [Abstract] Assets Assets, Noncurrent [Abstract] Long-term assets Disposal Group, Including Discontinued Operation, Assets, Current Current assets held for sale Total current assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current [Abstract] Current assets Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract] Long-term assets Award Type [Axis] Award Type [Axis] Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Board of directors. Board Of Directors [Member] Board of Directors [Member] Business Description and Basis of Presentation [Text Block] Overview Capnia Inc joint venture. Capnia Inc Joint Venture [Member] Capnia Inc Joint Venture [Member] Capnia, Inc. Capnia, Inc. [Member] Capnia, Inc. [Member] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents, Fair Value Disclosure Cash and cash equivalents Cash and cash equivalents period increase decrease included in current assets held for sale. Cash And Cash Equivalents Period Increase Decrease Included In Current Assets Held For Sale Net increase in cash and cash equivalents included in current assets held for sale Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of period Cash, cash equivalents and restricted cash, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase (decrease) in cash, cash equivalents and restricted cash Cashless Warrants Exercised Cashless Warrants Exercised Warrants cashless exercised (in shares) Cash Provided by (Used in) Financing Activities, Discontinued Operations Net cash provided by discontinued financing activities Cash Provided by (Used in) Investing Activities, Discontinued Operations Net cash provided by discontinued investing activities Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash used in discontinued operating activities Changes Measurement [Member] Changes Measurement [Member] Class of Stock [Domain] Class of Stock [Domain] Class of Stock [Line Items] Class of Stock [Line Items] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Class of Warrant or Right, Exercise Price Description Class of Warrant or Right, Exercise Price Description Warrant issuance description Class of Warrant or Right, Exercise Price of Warrants or Rights Warrant exercise price Exercise price of warrants (in dollars per share) Exercise price of warrants exercised Class of Warrant or Right [Line Items] Class of Warrant or Right [Line Items] Class of Warrant Or Right, Liquidated Damages Amount, Percent of Volume Weighted Average Price Classof Warrant Or Right Liquidated Damages Amount Percentof Volume Weighted Average Price Aggregate VWAP (percent) Liquidated damages amount percent of VWAP (percent) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Warrant to call common stock Class of Warrant or Right, Number of Securities Called by Warrants or Rights Number of common stock purchased upon issuance of warrants Warrants, to purchase shares of common stock Class of Warrant or Right, Outstanding Balance at the end of period, in shares Balance at the beginning of period, in shares Warrants outstanding (in shares) Class of Warrant or Right [Table] Class of Warrant or Right [Table] Class Of Warrant Or Right, Warrant Term Class Of Warrant Or Right Warrant Term Warrants term Commitments and Contingencies Commitments and contingencies (Note 7) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Stock [Member] Common Stock [Member] Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock Purchase Agreement, Agreement Term Common Stock Purchase Agreement Agreement Term Purchase agreement term Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Number of shares available for issuance under the plan on the first day of each year Common Stock, Value, Issued Common stock Common Stock Warrant Liability [Member] Common Stock Warrant Liability [Member] Common stock warrant liability [Member] Compensation Related Costs [Abstract] Compensation Related Costs [Abstract] Compensation Related Costs, General [Text Block] Compensation Plan for Board Members Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Contingent liability payment on achievement of sales milestone. Contingent liability payment on achievement of sales milestone Contingent liability payment on achievement of sales milestone Conversion of Stock, Shares Converted Number of shares converted Conversion of Stock, Shares Issued Number of shares issued upon conversion Convertible Debt Securities [Member] Warrants Issued to 2010/2012 Convertible Note Holders to Purchase Common Stock [Member] Convertible Preferred Stock [Member] Convertible Preferred Stock [Member] Convertible Preferred Stock, Shares Issued upon Conversion Conversion ratio Corporate Joint Venture [Member] Corporate Joint Venture [Member] CoSenseand, NFI and Serenz. CoSense N F I and Serenz [Member] CoSense, NFI and Serenz [Member] Current Fiscal Year End Date Current Fiscal Year End Date Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization De-recognition Of Warrant Derivative Liability Derecognition Of Warrant Derivative Liability De-recognition of warrant liability Derivative Financial Instruments, Liabilities [Member] Convertible preferred stock warrant liability [Member] Derivative Liability, Noncurrent Series A Warrant liability Warrant liability Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Loss on sale of assets Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Operating loss Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic and Diluted Share Loss per common share from discontinued operations, basic and diluted Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations, Held-for-sale [Member] Discontinued Operations, Held-for-sale [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Accounts receivable Disposal Group, Including Discontinued Operation, Accounts Payable, Current Accounts payable Disposal Group, Including Discontinued Operation, Accrued Compensation and Other Liabilities, Current Disposal Group Including Discontinued Operation Accrued Compensationand Other Liabilities Current Accrued compensation and other current liabilities Disposal Group, Including Discontinued Operation, Assets, Noncurrent Long-term assets held for sale Total long-term assets held for sale Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Cash and cash equivalents Disposal Group, Including Discontinued Operation, Cost and Expenses Disposal Group Including Discontinued Operation Cost And Expense Total expenses Disposal Group Including Discontinued Operation Cost Of Goods Sold (Refunded) Disposal Group Including Discontinued Operation Cost Of Goods Sold (Refunded) Cost of product revenue Disposal Group, Including Discontinued Operation, General and Administrative Expense General and administrative Disposal Group, Including Discontinued Operation, Gross Profit (Loss) Gross profit (loss) Disposal group including discontinued operation income (expenses). Disposal Group Including Discontinued Operation Income (Expenses) Other income (expense) Disposal Group, Including Discontinued Operation, Inventory, Current Inventory Disposal Group, Including Discontinued Operation, Operating Income (Loss) Operating loss Disposal Group, Including Discontinued Operation, Other Intangible Assets, Noncurrent Disposal Group Including Discontinued Operation Other Intangible Assets Noncurrent Other intangible assets Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent Other long-term liabilities Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current Prepaid expenses and other current assets Disposal Group Including Discontinued Operation Product Revenue Disposal Group Including Discontinued Operation Product Revenue Product revenue Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent Property and equipment, net Disposal Group, Including Discontinued Operation, Research and Development Disposal Group Including Discontinued Operation Research And Development Research and development Disposal Group, Including Discontinued Operation, Sales and Marketing Disposal Group Including Discontinued Operation Salesand Marketing Sales and marketing Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] Expenses Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations and Assets Held for Sale Disposal Group Name [Domain] Disposal Group Name [Domain] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share, Basic and Diluted Net loss per common share, basic and diluted Pro Forma net loss per common share Earnings Per Share [Text Block] Net loss per share Earnout Payments [Member] Earnout Payments [Member] Earnout Payments [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Future stock-based compensation, requisite service period Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Future stock-based compensation for unvested employee options granted and outstanding Employee Stock [Member] Employee Stock Purchase Plan [Member] Employee Stock Option [Member] Stock Options [Member] Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity [Domain] Entity [Domain] Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Entity Small Business Entity Small Business Equity [Abstract] Equity [Abstract] Equity Component [Domain] Equity Component [Domain] Investment, Name [Domain] Investment, Name [Domain] Equity Method Investment, Ownership Percentage Ownership interest (percent) Equity Method Investments Investment Equity Unit Purchase Agreements [Member] Equity Unit Purchase Agreements [Member] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Essentialis, Inc. Essentialis Inc [Member] Essentialis, Inc. [Member] Fair Value Adjustment of Warrants Change in fair value of stock warrants Change in fair value of warrant liabilities (Increase) decrease in the fair value of warrants liabilities Change in fair value of warrants liabilities Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Summary of Financial Instruments Measured at Fair Value on Recurring Basis Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Fair Value of Convertible Preferred Stock Warrant Liability Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Liability Class [Axis] Liability Class [Axis] Measurement Basis [Axis] Measurement Basis [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value of Financial Instruments Fair Value, Inputs, Level 1 [Member] Level 1 [Member] Fair Value, Inputs, Level 3 [Member] Level 3 [Member] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Summary of Changes in Fair Value of Level1 and Level 3 Financial Instruments Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Change in value of liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Balance at end of period Balance at the beginning of period First commercial sales milestone. First commercial sales milestone First commercial sales milestone Gain (Loss) on Contract Termination Cease-use income General and Administrative Expense General and administrative General and Administrative Expense [Member] General and Administrative [Member] Incentive Stock Options [Member] Incentive Stock Options [Member] ISOs [Member] Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Loss from continuing operations Loss from continuing operations Income (Loss) from Continuing Operations, Per Basic and Diluted Share Loss per common share from continuing operations, basic and diluted Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Loss from discontinued operations Loss from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent [Abstract] Loss from discontinued operations Income Statement [Abstract] Income Statement [Abstract] Disposal Group Name [Axis] Disposal Group Name [Axis] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued compensation and other current liabilities Increase (Decrease) in Operating Capital [Abstract] Change in operating assets and liabilities: Increase (Decrease) in Other Noncurrent Liabilities Other long-term liabilities Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Indemnification Claims [Member] Indemnification Claims [Member] Indemnification Claims [Member] Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Investment Owned, Balance, Shares Number of shares owned Required maximum investment to purchase joint venture common shares on an incremental quarterly basis commencing in December 2017. Investment Threshold Requirement Investment threshold requirement Required minimum cumulative investment threshold to receive additional common stock from joint venture. Investment Threshold Requirement Stock Issuance Investment threshold requirement stock issuance IPO [Member] IPO [Member] Legal Entity [Axis] Legal Entity [Axis] Lessee Leasing Arrangements, Operating Leases, Increases to Monthly Payments, Term Lessee Leasing Arrangements Operating Leases Increasesto Monthly Payments Term Period of increases to monthly payments Lessee, Operating Lease, Term of Contract Non-cancelable operating lease agreement term Liabilities Total liabilities Total liabilities Liabilities and Equity Total liabilities and stockholders' equity Liabilities and Equity [Abstract] Liabilities and stockholders' equity Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Total common stock warrant and contingent consideration liability Liabilities, Fair Value Disclosure [Abstract] Liabilities Liabilities, Noncurrent [Abstract] Long-term liabilities Disposal Group, Including Discontinued Operation, Liabilities, Current Current liabilities held for sale Total current liabilities for sale Disposal Group, Including Discontinued Operation, Liabilities, Current [Abstract] Current liabilities Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Long-term liabilities held for sale Total long-term liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent [Abstract] Long-term liabilities Liquidity And Managements Plans [Line Items] Liquidity And Managements Plans [Line Items] Liquidity And Managements Plans [Line Items] Liquidity And Managements Plans [Table] Liquidity And Managements Plans [Table] Liquidity And Managements Plans [Table] Maximum [Member] Maximum [Member] Maximum value of shares for issuance under securities purchase agreement. Maximum Value Of Shares For Issuance Under Securities Purchase Agreement Maximum commitment under stock purchase agreement Measurement Input, Discount Rate [Member] Measurement Input, Discount Rate [Member] Measurement Input, Expected Term [Member] Expected Term [Member] Measurement Input, Price Volatility [Member] Volatility [Member] Measurement Input, Risk Free Interest Rate [Member] Risk-free Rate [Member] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Minimum [Member] Minimum [Member] Money Market Funds [Member] Money market fund [Member] NeoForce Holdings Inc. Neo Force Holdings Inc. [Member] NeoForce Holdings Inc. [Member] Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by continuing financing activities Net Cash Provided by (Used in) Investing Activities Net cash provided by (used) in investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in continuing investing activities Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash used in continuing operating activities Net Income (Loss) Attributable to Parent Net loss Net loss New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Standards Non-cash expense on shares issued. Non-cash Expense on Shares Issued Non-cash expense of issuing shares to Aspire Capital Noncash Investing and Financing Items [Abstract] Supplemental disclosures of non-cash investing and financing information Noncash or part noncash acquisition, contingent consideration. Noncash Or Part Noncash Acquisition Contingent Consideration Contingent consideration of Essentialis acquisition Nonoperating Income (Expense) Total other income (expense) Total other income (expense) Nonoperating Income (Expense) [Abstract] Other income (expense) OAHL. OAHL [Member] OAHL [Member] Operating Expenses Total operating expenses Operating Expenses [Abstract] Operating expenses Operating Income (Loss) Operating loss Operating Leases, Future Minimum Payments Due Future minimum commitment under non-cancelable operating lease Operating Leases, Rent Expense, Net Rent expense Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Other Assets, Noncurrent Other assets Other Liabilities, Noncurrent Other liabilities Other Noncash Expense Board fees paid with common stock Other Nonoperating Income (Expense) Interest and other income (expense) Ownership Interest, Percentage of Voting Rights of Stock Ownership Interest Percentageof Voting Rightsof Stock Ownership interest of voting rights of all classes of stock (percent) Payments to Acquire Assets, Investing Activities Costs of Essentialis acquisition paid Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Preferred Stock, Liquidation Preference, Value Preferred stock, aggregate liquidation preference Preferred Stock, Par or Stated Value Per Share Convertible preferred stock, par value (in dollars per share) Preferred stock par value (in dollars per share) Preferred Stock, Shares Authorized Convertible preferred stock, shares authorized Preferred stock shares authorized Preferred Stock, Shares Issued Preferred stock shares issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Convertible preferred stock, shares outstanding Preferred stock, shares outstanding Preferred Stock, Stated Value Per Share Preferred Stock Stated Value Per Share Convertible preferred stock, stated value (in dollars per share) Preferred Stock, Value, Issued Preferred stock Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Reclassification, Policy [Policy Text Block] Restatement of prior periods Proceeds from Divestiture of Businesses Proceeds from the sale of business Proceeds from Issuance of Common Stock Proceeds from issuance of common stock Proceeds from issuance of common stock under tender offer Proceeds from issuance or sale of equity gross Proceeds From Issuance Or Sale Of Equity Gross Gross Proceeds from issuance of units Proceeds from Warrant Exercises Proceeds from exercise of warrants Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Property, Plant and Equipment, Net Property and equipment, net Purchase price contingent liability. Purchase price contingent liability [Member] Purchase price contingent liability [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Related Party [Domain] Related Party [Domain] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Related Party [Axis] Related Party [Axis] Research and Development Expense Research and development Research and Development Expense [Member] Research and Development [Member] Restatement Adjustment [Member] Restatement Adjustment [Member] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Restricted Cash and Cash Equivalents, Current Restricted cash Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Restricted Stock Units (RSUs) [Member] Restricted Stock Units [Member] Retained Earnings (Accumulated Deficit) Accumulated deficit Sabby Management Llc [Member] Sabby Management Llc [Member] Sabby Management, LLC [Member] Sale of Stock [Domain] Sale of Stock [Domain] Previously Reported [Member] Previously Reported [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of Potentially Dilutive Securities Outstanding Excluded from Computations of Diluted Weighted-Average Shares Outstanding Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Disposal Groups, Including Discontinued Operations [Table Text Block] Components of Discontinued Operations Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary of Stock Based Compensation Expense Investment, Name [Axis] Investment, Name [Axis] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Effects of Restatement on Affected Items within Company's Previously Reported Consolidated Balance Sheets and Statements of Operations Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of Stock Option Transactions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Fair Value of Award Granted Using Black-Scholes Option Pricing Model Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Second commercial sales milestone. Second commercial sales milestone Second commercial sales milestone Continuing Operations [Member] Continuing Operations [Member] Discontinued Operations [Member] Discontinued Operations [Member] Operating Activities [Domain] Operating Activities [Domain] Selling and Marketing Expense Sales and marketing Series A Warrants [Member] Series A- Warrants [Member] Series A Warrant Liability [Member] Series A Warrants to Purchase Common Stock [Member] Series A- Warrants to Purchase Common Stock [Member] Series A Warrants to Purchase Shares of Common Stock [Member] Series B Preferred Stock [Member] Series B Convertible Preferred Stock [Member] Series B Warrants [Member] Series B Warrants [Member] Series B Warrant Liability [Member] Series C Warrants [Member] Series C Warrants [Member] Series C Warrant [Member] Series C Warrant To Purchase Common Stock [Member] SeriesC Warrant To Purchase Common Stock [Member] Series C Warrant to Purchase Common Stock [Member] Series D Warrants [Member] Series D Warrants [Member] Series D Warrants [Member] Series D Warrant To Purchase Common Stock [Member] Series D Warrant To Purchase Common Stock [Member] Series D Warrant To Purchase Common Stock [Member] Share-based Compensation Stock-based compensation expense Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Stock units granted Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Contractual term of option Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected life (years) 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, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Number of shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options canceled/forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Number of options granted Options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value per option granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] Sharebased Compensation Arrangementby Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value [Roll Forward] Weighted-Average Exercise Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Stock options outstanding, intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Ending balance Beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, 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