Equity [Abstract] Class of Warrant or Right [Table] Class of Warrant or Right [Table] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Series A Warrants to Purchase Shares of Common Stock [Member] Series A- Warrants to Purchase Common Stock [Member] Series A Warrants to Purchase Common Stock [Member] Series A Warrant Liability [Member] Series A Warrants [Member] Series A Warrants [Member] Series B Warrants to Purchase Shares of Common Stock [Member] Series B Warrant To Purchase Common Stock [Member] Series B Warrant To Purchase Common Stock [Member] Series B Warrant Liability [Member] Series B Warrants [Member] Series B Warrants [Member] Series C Warrant Liability [Member] Series C Warrants [Member] Series C Warrants [Member] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] IPO [Member] IPO [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Decrease in carrying value [Member] Reported Value Measurement [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Common stock warrant liability [Member] Common Stock Warrant Liability [Member] Common Stock Warrant Liability [Member] Other Significant Noncash Transaction [Axis] Other Significant Noncash Transaction [Axis] Other Significant Noncash Transaction, Name [Domain] Other Significant Noncash Transaction, Name [Domain] Cash Less Exercise [Member] Cashless Exercise [Member] Cashless exercise. Class of Warrant or Right [Line Items] Class of Warrant or Right [Line Items] Aggregate VWAP (percent) Class of Warrant Or Right, Liquidated Damages Amount, Percent of Volume Weighted Average Price Class of Warrant Or Right, Liquidated Damages Amount, Percent of Volume Weighted Average Price Number of common stock purchased upon issuance of warrants (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Exercise price of warrants exercised (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Warrants term Class Of Warrant Or Right, Warrant Term Class Of Warrant Or Right, Warrant Term Warrants exercised (in shares) Warrants Exercised Warrants Exercised Warrants outstanding (in shares) Class of Warrant or Right, Outstanding Warrant liability Derivative Liability, Noncurrent (Increase) decrease in the fair value of warrants liabilities Fair Value Adjustment of Warrants De-recognition of Warrant liability upon exercise, shares issued Stock Issued During Period Shares Exercised Of Warrants Stock Issued During Period Shares Exercised Of Warrants De-recognition of Warrant liability upon exercise Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements De-recognition of warrant liability De-recognition Of Warrant Derivative Liability De-recognition Of Warrant Derivative Liability Gross proceeds upon exercise of warrants Proceeds from Warrant Exercises Issuance of shares upon cashless exercise warrants (in shares) Stock Issued During Period Shares Cashless Exercise Of Warrants Stock Issued During Period Shares Cashless Exercise Of Warrants Warrants cashless exercised (in shares) Cashless Warrants Exercised Cashless Warrants Exercised Proceeds from issuance of common stock under tender offer Proceeds from Issuance of Common Stock Organization, Consolidation and Presentation of Financial Statements [Abstract] Number of Products Derived from Proprietary Technologies Number of Products Derived from Proprietary Technologies Number of Products Derived from Proprietary Technologies Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Summary of Stock Based Compensation Expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of Fair Value of Award Granted Using Black-Scholes Option Pricing Model Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of Stock Option Transactions Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Essentialis, Inc. [Member] Essentialis, Inc. [Member] Essentialis, Inc. [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Pro forma total revenue Business Acquisition, Pro Forma Revenue Pro forma net loss Business Acquisition, Pro Forma Net Income (Loss) Pro forma net loss per share - basic and diluted (in usd per share) Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted Proforma weighted-average shares - basic and diluted (in shares) Pro Forma Weighted Average Shares Outstanding, Basic and Diluted Pro Forma Weighted Average Shares Outstanding, Basic and Diluted Earnings Per Share [Abstract] Net loss per share Earnings Per Share [Text Block] Compensation Related Costs [Abstract] Compensation Plan for Board Members Compensation Related Costs, General [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series B Convertible Preferred Stock [Member] Series B Preferred Stock [Member] Statement [Line Items] Statement [Line Items] Assets Assets [Abstract] Current assets Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable Accounts Receivable, Net, Current Restricted cash Restricted Cash and Cash Equivalents, Current Inventory Inventory, Net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Long-term assets Assets, Noncurrent [Abstract] Property and equipment, net Property, Plant and Equipment, Net Goodwill Goodwill Other intangible assets, net Other Intangible Assets, Net Other assets Other Assets, Noncurrent Total assets Assets Liabilities and stockholders’ equity Liabilities and Equity [Abstract] Current liabilities Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued compensation and other current liabilities Accrued Liabilities and Other Liabilities Total current liabilities Liabilities, Current Long-term liabilities Liabilities, Noncurrent [Abstract] Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 6) Commitments and Contingencies Stockholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Preferred Stock, $.001 par value 10,000,000 shares authorized: Series B convertible preferred stock, 13,780 are designated at March 31, 2017 and December 31, 2016; 12,179 and 12,780 shares issued and outstanding at March 31, 2017 and at December 31, 2016, respectively. Liquidation value of zero. Preferred Stock, Value, Issued Common stock, $0.001 par value, 100,000,000 shares authorized, 47,479,879 and 16,786,952 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively. Common Stock, Value, Issued Additional paid-in-capital Additional Paid in Capital, Common Stock Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Indemnification Claims [Member] Indemnification Claims [Member] Indemnification Claims [Member] Development Milestone [Member] Development Milestone [Member] Development Milestone [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Aspire Capital Fund, LLC [Member] Aspire Capital Fund Llc [Member] Aspire Capital Fund Llc [Member] Maxim Group Llc [Member] Maxim Group Llc [Member] Maxim Group Llc [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] 2015 Sabby Purchase Agreement [Member] Twenty Fifteen Sabby Purchase Agreement [Member] Twenty Fifteen Sabby Purchase Agreement [Member] 2016 Sabby Purchase Agreement [Member] Twenty Sixteen Sabby Purchase Agreement [Member] Twenty Sixteen Sabby Purchase Agreement [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Sabby Management, LLC [Member] Sabby Management Llc [Member] Sabby Management Llc [Member] Series A Convertible Preferred Stock [Member] Series A Preferred Stock [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] NSO [Member] Non Qualified Stock Options [Member] Non Qualified Stock Options [Member] Stock Options [Member] Employee Stock Option [Member] ISOs [Member] Incentive Stock Options [Member] Incentive Stock Options [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Employee Stock Purchase Plan [Member] Employee Stock [Member] Series D Warrants [Member] Series D Warrants [Member] Series D Warrants [Member] Warrants to Purchase Stock [Member] Warrants To Purchase Common Stock [Member] Warrants To Purchase Stock [Member] Underwriter [Member] Underwriter [Member] Underwriter [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 2010 and 2012 Convertible Promissory Notes [Member] Two Thousand and Ten and Two Thousand and Twelve Convertible Promissory Notes [Member] Two Thousand and Ten and Two Thousand and Twelve Convertible Promissory Notes [Member] Warrants Issued in 2009 to Purchase Common Stock [Member] Warrant [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Convertible preferred stock, shares authorized Preferred Stock, Shares Authorized Convertible preferred stock, shares issued Preferred Stock, Shares Issued Convertible preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Convertible preferred stock, stated value (in dollars per share) Preferred Stock, Stated Value Per Share Preferred Stock, Stated Value Per Share Ownership interest (percent) Equity Method Investment, Ownership Percentage Exercise price of warrants (in dollars per share) Number of shares converted (in shares) Conversion of Stock, Shares Converted Number of shares issued upon conversion (in shares) Conversion of Stock, Shares Issued Convertible preferred stock, shares outstanding Preferred Stock, Shares Outstanding Shares issued for acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Shares issued for an investment (in shares) Stock Issued During Period, Shares, Debt Issuances Stock Issued During Period, Shares, Debt Issuances Stock sold price per share (in dollars per share) Sale of Stock, Price Per Share Proceeds from issuance of common stock Shares issued during period (in shares) Stock Issued During Period, Shares, New Issues Percentage of fair market value Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Ownership interest of voting rights of all classes of stock (percent) Ownership Interest, Percentage of Voting Rights of Stock Ownership Interest, Percentage of Voting Rights of Stock Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Contractual term of option Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Stock-based compensation expense Allocated Share-based Compensation Expense Income tax benefit from stock compensation expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Number of options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Weighted average grant date fair value per option granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Future stock-based compensation for unvested employee options granted and outstanding Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Future stock-based compensation, requisite service period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Stock options outstanding, intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Number of shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Percentage of outstanding stock maximum Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum Additional shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Liquidated damages amount percent of VWAP (percent) Accounting Policies [Abstract] Write-down of inventory Inventory Write-down Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Acquired Indefinite-lived Intangible Assets [Line Items] Acquired Indefinite-lived Intangible Assets [Line Items] Intangible assets estimated useful lives Finite-Lived Intangible Asset, Useful Life Impairment of goodwill Goodwill, Impairment Loss Loss Contingencies [Table] Loss Contingencies [Table] Earnout Payments [Member] Earnout Payments [Member] Earnout Payments [Member] NeoForce Group, Inc. [Member] Neo Force Group Inc [Member] Neo Force Group Inc [Member] NeoForce, Inc [Member] Neo Force Inc [Member] Neo Force Inc [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Ivyland, Pennsylvania [Member] Ivyland, Pennsylvania [Member] Ivyland, Pennsylvania [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Non-cancelable operating lease agreement term Lessee Leasing Arrangements, Operating Leases, Term of Contract Area of real estate property (in sqft) Area of Real Estate Property Future minimum commitment under non-cancelable operating lease Operating Leases, Future Minimum Payments Due Term of increases to monthly payments Lessee Leasing Arrangements, Operating Leases, Increases to Monthly Payments, Term Lessee Leasing Arrangements, Operating Leases, Increases to Monthly Payments, Term Additional area of office space for headquarters facility Additional Operating Lease Office Space Additional operating lease office space. Rent expense Operating Leases, Rent Expense, Net Royalty payment period Royalty Payment Period Royalty Payment Period Fair value of royalty Business Combination Consideration Transferred Fair Value Of Royalty Business combination consideration transferred fair value of royalty. Noncurrent fair value of royalty Business Combination Consideration Transferred Fair Value Of Royalty, Noncurrent Business Combination Consideration Transferred Fair Value Of Royalty, Noncurrent Contingent consideration Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Contingent consideration liability Business Combination, Contingent Consideration, Liability Long-term contingent consideration liability Business Combination, Contingent Consideration, Liability, Noncurrent Essentialis, Inc. Acquisition Business Combination Disclosure [Text Block] Liquidity And Managements Plans [Table] Liquidity And Managements Plans [Table] Liquidity And Managements Plans [Table] Liquidity And Managements Plans [Line Items] Liquidity And Managements Plans [Line Items] Liquidity And Managements Plans [Line Items] Net loss Net Income (Loss) Attributable to Parent Accumulated deficit Positive (deficit) in working capital Working Capital Working Capital Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Maximum commitment under stock purchase agreement Maximum Value Of Shares For Issuance Under Securities Purchase Agreement Maximum value of shares for issuance under securities purchase agreement. Agreement term Common Stock Purchase Agreement, Agreement Term Common Stock Purchase Agreement, Agreement Term Summary of Financial Instruments Measured at Fair Value on Recurring Basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Summary of Changes in Fair Value of Level1 and Level 3 Financial Instruments Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Shares Available for Grant [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Shares Available for Grant [Roll Forward] Options Available, Beginning balance Options Available, Additional shares authorized Options Available, Amendment to plan to authorize additional shares Share-based Compensation Arrangement by Share-based Payment Award, Plan Amendment, Number of Additional Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Plan Amendment, Number of Additional Shares Authorized Options Available, Granted Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Granted Share based compensation arrangement by share based payment award number of shares available for grant granted. Options Available, Exercised Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Exercised In Period Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Exercised In Period Options Available, Canceled/Forfeited Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Forfeitures In Period Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Forfeitures In Period Options Available, Ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options granted Options canceled/forfeited Share-based Compensation Arrangement by 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period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options vested at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Weighted Average Remaining Contractual Term Options vested and expected to vest at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Options vested at end of period (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Options vested at end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Options vested and expected to vest at end of period (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Options vested and expected to vest at end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Warrant Liabilities Warrant Liability Disclosure [Text Block] Warrant Liability Disclosure [Text Block] Revenue Milestone One [Member] Revenue Milestone One [Member] Revenue Milestone One [Member] Revenue Milestone Two [Member] Revenue Milestone Two [Member] Revenue Milestone Two [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Patents [Member] Patents [Member] Shares issued in acquisition (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Share price (in usd per share) Share Price Probability of development success rate (percent) Business Combination, Contingent Consideration Arrangements, Milestone Achievement, Probability of Development Success Rate Business Combination, Contingent Consideration Arrangements, Milestone Achievement, Probability of Development Success Rate Revenue milestone in 2023 Business Combination, Contingent Consideration Arrangements, Revenue Milestone, Year Six Business Combination, Contingent Consideration Arrangements, Revenue Milestone, Year Six Revenue milestone in 2025 Business Combination, Contingent Consideration Arrangements, Revenue Milestone, Year Eight Business Combination, Contingent Consideration Arrangements, Revenue Milestone, Year Eight WACC discount rate (percent) Fair Value Inputs, Discount Rate Capitalized costs Asset Acquisition, Capitalized Costs Asset Acquisition, Capitalized Costs Legal fees Asset 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Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Liabilities Liabilities, Fair Value Disclosure [Abstract] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Description of Business Business Description and Basis of Presentation [Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Potentially Dilutive Securities Outstanding Excluded from Computations of Diluted Weighted-Average Shares Outstanding Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Convertible preferred stock, shares designated Preferred Stock, Shares Designated Preferred Stock, Shares Designated Convertible preferred stock, aggregate liquidation preference Preferred Stock, Liquidation Preference, Value Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Inventory Inventory, Policy [Policy Text 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[Member] Garfield vs Capnia, Inc. [Member] Garfield vs Capnia, Inc. 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[Line Items] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Issuance of common stock to board members in lieu of cash payments for quarterly board fees (shares) Stock Issued During Period, Shares, Issued for Services Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Reverse stock split ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Line Items] Class of Stock [Line Items] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] 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outstanding Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Board fees paid with common stock Other Noncash Expense Change in fair value of common stock warrants Change In Fair Value Of Common Stock Warrants Change In Fair Value Of Common Stock Warrants Non-cash expense of issuing shares to Aspire Capital Non-cash Expense On Shares Issued Non-cash expense on shares issued. Change in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Change in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventory Increase (Decrease) in Inventories Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued compensation and other current liabilities Increase (Decrease) in Accrued Liabilities Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Net cash used in operating activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from sale of Series A preferred convertible stock Proceeds from Issuance of Convertible Preferred Stock Series A preferred convertible stock transaction costs paid Payments of Stock Issuance Costs Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Supplemental disclosures of noncash investing and financing information Noncash Investing and Financing Items [Abstract] Conversion of preferred stock to common stock Conversion of Stock, Amount Issued Issuance of common stock in Essentialis acquisition Stock Issued Costs of Essentialis acquistions included in accounts payable Noncash or Part Noncash Acquisition, Value of Assets Acquired But Not Yet Paid Noncash or Part Noncash Acquisition, Value of Assets Acquired But Not Yet Paid Contingent consideration of Essentialis acquisition Noncash or Part Noncash Acquisition, Contingent Consideration Noncash or Part Noncash Acquisition, Contingent Consideration De-recognition of Series B warrant liability (cashless exercise) Fixed asset purchases in accounts payable Fair Value of Assets Acquired Common Stock Purchase Agreement Expected life (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Dividend rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Shareholder Lawsuit Legal Matters and Contingencies [Text Block] Fair Value Inputs, Liabilities, Quantitative Information [Table] Fair Value Inputs, Liabilities, Quantitative Information [Table] Fair Value Inputs, Liabilities, Quantitative Information [Line Items] Fair Value Inputs, Liabilities, Quantitative Information [Line Items] Volatility Fair Value Assumptions, Expected Volatility Rate Expected Term Fair Value Assumptions, Expected Term Expected dividend yield Fair Value Assumptions, Expected Dividend Rate Risk-free rate Fair Value Assumptions, Risk Free Interest Rate Raw materials Inventory, Raw Materials, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Total inventory Fair value of stock consideration Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Fair value of contingent consideration Business Combination, Consideration Transferred, Other Total purchase price consideration Business Combination, Consideration Transferred Finite-lived intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Net Assets Acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Schedule of Inventory Schedule of Inventory, Current [Table Text Block] 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] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Research & Development [Member] Research and Development Expense [Member] Sales & Marketing [Member] Selling and Marketing Expense [Member] General & Administrative [Member] General and Administrative Expense [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] Total stock compensation expense Schedule of Purchase Price Consideration Schedule of Business Acquisitions, by Acquisition [Table Text Block] Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block]