Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Accumulated Deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Preferred stock, shares outstanding, beginning balance Preferred Stock, Shares Outstanding Equity, beginning balance Stockholders' Equity Attributable to Parent Common stock, shares outstanding, beginning balance Common Stock, Shares, Outstanding Vesting of restricted common stock (shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Vesting of restricted common stock Stock Issued During Period, Value, Restricted Stock Award, Gross Issuance of common stock from option exercises (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Issuance of common stock from option exercises Stock Issued During Period, Value, Stock Options Exercised Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Unrealized gain on available-for-sale securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Net loss Net Income (Loss) Attributable to Parent Adjustment related to adoption of new accounting pronouncement using the modified retrospective transition method (Note 2) Cumulative Effect of New Accounting Principle in Period of Adoption Preferred stock, shares outstanding, ending balance Equity, ending balance Common stock, shares outstanding, ending balance Revenue from Contract with Customer [Abstract] Revenue from contract with customers Revenue from Contract with Customer [Text Block] Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Non-employee consultants and advisers Non-employee Consultants and Advisers [Member] Non-employee Consultants and Advisers [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Unvested restricted common stock Restricted Stock [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Vests upon issuance Share-based Compensation Award, Tranche One [Member] Vests ratably over four years Share-based Compensation Award, Tranche Two [Member] Class of Stock [Line Items] Class of Stock [Line Items] Common stock, shares authorized (shares) Common Stock, Shares Authorized Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock, number of votes per share Common Stock, Number of Votes Number of Votes Restricted common stock, shares sold Stock Issued During Period, Shares, New Issues Restricted common stock, price per share (in usd per share) Sale of Stock, Price Per Share Proceeds from sale of restricted common stock to founders Proceeds From Sale Of Restricted Common Stock Proceeds From Sale Of Restricted Common Stock Restricted common stock, percent vested Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Restricted common stock, vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Restricted common stock, fair value of shares vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Restricted common stock, issued (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Restricted common stock, shares outstanding Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Common stock purchased under the 2015 ESPP (shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Payables and Accruals [Abstract] Payroll and employee-related costs Employee-related Liabilities, Current Professional fees Accrued Professional Fees, Current Restructuring-related costs Restructuring Reserve, Current Consumer product-related costs Accrued Marketing Costs, Current Research and development costs Accrued Research And Development Expense, Current Accrued Research And Development Expense, Current Total Accrued Expenses And Other Current Liabilities Accrued Expenses And Other Current Liabilities Commitments and Contingencies Disclosure [Abstract] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Royalty agreement first ten years Royalty Agreement First Ten Years [Member] Royalty Agreement First Ten Years [Member] Royalty agreement next ten years Royalty Agreement Next Ten Years [Member] Royalty Agreement Next Ten Years [Member] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Future minimum lease payments Operating Leases, Future Minimum Payments Due Rent expense Operating Leases, Rent Expense, Net Percent of gross sales due to related parties Related Party Transaction, Percentage Of Gross Sales Due To Related Parties Related Party Transaction, Percentage of Gross Sales due to Related Parties Royalty expense Royalty Expense Royalties payable Accrued Royalties Royalty agreement term Related Party Transaction, Royalty Agreement Term Related Party Transaction, Royalty Agreement Term Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Selling, general and administrative expenses Selling, General and Administrative Expenses [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2015 Plan Equity Incentive Plan 2015 [Member] Equity Incentive Plan 2015 [Member] Employee stock option, one-year post termination exercisability Employee Stock Option, One-Year Post Termination Exercisability [Member] Employee Stock Option, One-Year Post Termination Exercisability [Member] Employee stock option, three-year post termination exercisability Employee Stock Option, Three-Year Post Termination Exercisability [Member] Employee Stock Option, Three-Year Post Termination Exercisability [Member] Non-employee stock options Non-employee Stock Options [Member] Non-employee stock options [Member] Options to purchase common stock Employee Stock Option [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares remaining available for grant of stock awards (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares granted to non-employee consultants and members of the Scientific Advisory Board (shares) Share-based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Non-Employee Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Non-Employee Stock options, vesting period Stock options, contractual term Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Stock-based compensation expense Allocated Share-based Compensation Expense Shares granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Shares granted, weighted-average grant date fair value (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Shares exercised (shares) Shares exercised, weighted average exercise price (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Stock options exercised, intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Unrecognized compensation cost, recognition period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Post termination exercisability period Share-based Compensation Arrangement by Share-based Payment Award, Options, Post Termination Exercisability Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Post Termination Exercisability Period Option awards held (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of employees holding options Share-based Compensation Arrangement by Share-based Payment Award, Number of Employees Holding Options Share-based Compensation Arrangement by Share-based Payment Award, Number of Employees Holding Options Number of advisers holding options Share-based Compensation Arrangement by Share-based Payment Award, Number of Advisers Holding Options Share-based Compensation Arrangement by Share-based Payment Award, Number of Advisers Holding Options Post termination exercisability extended period Share-based Compensation Arrangement by Share-based Payment Award, Options, Post Termination Exercisability Extended Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Post Termination Exercisability Extended Period Number of employees terminated Share-based Compensation Arrangement by Share-based Payment Award, Number of Employees Terminated Share-based Compensation Arrangement by Share-based Payment Award, Number of Employees Terminated Number of employees granted options Share-based Compensation Arrangement by Share-based Payment Award, Number of Employees Granted Options Share-based Compensation Arrangement by Share-based Payment Award, Number of Employees Granted Options Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] U.S. government agency securities US Government Agencies Debt Securities [Member] Commercial paper Commercial Paper [Member] Corporate debt securities Corporate Debt Securities [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] 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] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Marketable securities Debt Securities, Available-for-sale Total assets at fair value Assets, Fair Value Disclosure Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and operations Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Income Tax Disclosure [Abstract] Deferred tax assets: Deferred Tax Assets, Gross [Abstract] U.S. and state net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Accruals and other temporary differences Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Amortization Deferred Tax Assets, Property, Plant and Equipment Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Tax credit carryforward Deferred Tax Assets, Tax Credit Carryforwards Total deferred tax assets Deferred Tax Assets, Gross Less valuation allowance Deferred Tax Assets, Valuation Allowance Deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Stock-based compensation Deferred Tax Liabilities, Tax Deferred Expense, Compensation And Benefits, Share-Based Compensation Cost Amount before allocation of valuation allowances of deferred tax liability attributable to deductible temporary differences from share-based compensation. Deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax assets Deferred Tax Assets, Net Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between revenue guidance in effect before and after Topic 606 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Increase to retained earnings due to adoption of Topic 606 Retained Earnings (Accumulated Deficit) Decrease in deferred revenue Contract with Customer, Liability Decrease in deferred costs from product revenue Deferred Costs Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Refund period Contract with Customer, Refund Period Contract with Customer, Refund Period Discounts to customers Sales Discounts Sales Discounts Inventory Disclosure [Abstract] Raw materials Inventory, Raw Materials, Net of Reserves Finished goods Inventory, Work in Process, Net of Reserves Total inventory Inventory, Net Write-off of inventory Inventory Write-down Cash and Cash Equivalents [Abstract] Restricted cash Cash and Cash Equivalents Disclosure [Text Block] Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [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] Research and development Research and Development Expense [Member] Selling, general and administrative General and Administrative Expense [Member] Employee Service Share-Based Compensation Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Common stock Stockholders' Equity Note Disclosure [Text Block] Schedule of inventory, net Schedule of Inventory, Current [Table Text Block] Quarterly Financial Information Disclosure [Abstract] Quarterly financial information (unaudited) Quarterly Financial Information [Text Block] Number of reportable segments Number of Reportable Segments Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Corporate Corporate, Non-Segment [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Consumer Operations Consumer Operations [Member] Consumer Operations [Member] Drug Development Drug Development [Member] Drug Development [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Loss from operations Operating Income (Loss) Interest income, net Interest Income, Operating Income Statement [Abstract] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Net product revenue Product [Member] Other revenue Product and Service, Other [Member] Costs and expenses: Operating Expenses [Abstract] Cost of product revenue Cost of Goods and Services Sold Research and development Research and Development Expense Selling, general and administrative General and Administrative Expense Total costs and expenses Operating Expenses Loss from operations Net loss Net loss attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Net loss per share attributable to common stockholders - basic and diluted (in usd per share) Earnings Per Share, Basic and Diluted Weighted-average number of common shares outstanding — basic and diluted (shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] U.S. Federal Domestic Tax Authority [Member] U.S. State State and Local Jurisdiction [Member] Income Taxes [Line Items] Operating Loss Carryforwards [Line Items] Net operating loss carryforward Operating Loss Carryforwards Operating loss carryforward tax affected Operating Loss Carryforwards, Tax Affected Operating Loss Carryforwards, Tax Affected Research and development tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Research Increase (decrease) in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Payroll tax credit Effective Income Tax Rate Reconciliation, Tax Credit, Payroll Tax Credit Election, Amount Effective Income Tax Rate Reconciliation, Tax Credit, Payroll Tax Credit Election, Amount Accounting Policies [Abstract] Summary of significant accounting policies Significant Accounting Policies [Text Block] Related Party Transactions [Abstract] Related parties Related Party Transactions Disclosure [Text Block] Schedule of effective income tax rate reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] Credit Facility [Axis] Restricted Cash and Cash Equivalents [Axis] Credit Facility [Domain] Cash and Cash Equivalents [Domain] Letter of Credit Letter of Credit [Member] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] Restricted cash, current Restricted Cash and Cash Equivalents, Current Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Manufacturing equipment Equipment [Member] Computers and computer equipment Computer Equipment [Member] Laboratory equipment Software and Software Development Costs [Member] Laboratory equipment Technology Equipment [Member] Capital in progress Capital in Progress [Member] Capital in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Total property and equipment Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Property, Plant and Equipment, Net Depreciation expense Depreciation Property and equipment disposals Property, Plant and Equipment, Disposals Proceeds from sales of property and equipment Proceeds from Sale of Property, Plant, and Equipment Loss on disposal of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Shares outstanding, beginning balance (shares) Shares exercised (shares) Shares forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Shares expired (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Shares outstanding, ending balance (shares) Shares exercisable (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Shares vested or expected to vest (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Weighted-Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Shares outstanding, beginning balance, weighted average exercise price (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Shares granted, weighted average exercise price (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Shares forfeited, weighted average exercise price (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Shares expired, weighted average exercise price (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Shares outstanding, ending balance, weighted average exercise price (in usd per share) Shares exercisable, weighted average exercise price (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Shares vested or expected to vest, weighted average exercise price (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Outstanding, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Exercisable, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Vested or expected to vest, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Outstanding, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Exercisable, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Vested or expected to vest, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Earnings Per Share [Abstract] Schedule of antidilutive securities excluded from computation of earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Statement of Cash Flows [Abstract] 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 expense Stock-based compensation expense Share-based Compensation Amortization and accretion on investments Investment Income, Net, Amortization of Discount and Premium Other non-cash items Other Noncash Expense Changes 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 current assets Increase (Decrease) in Prepaid Expense and Other Assets Other assets Increase (Decrease) in Other Noncurrent Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Deferred rent Increase (Decrease) in Deferred Liabilities Other long term liabilities Increase (Decrease) in Other Noncurrent Liabilities Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of marketable securities Payments to Acquire Marketable Securities Proceeds from maturities and sales of marketable securities Proceeds from Sale and Maturity of Marketable Securities Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from exercise of common stock Proceeds from Stock Options Exercised Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities 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 Cash, cash equivalents and restricted cash at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Property and equipment purchases included in accounts payable Property And Equipment Purchases In Accounts Payable and Accrued Expense Property And Equipment Purchases In Accounts Payable and Accrued Expense Entity Location [Table] Entity Location [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] UNITED STATES UNITED STATES Shipping and handling Shipping and Handling [Member] Entity Location [Line Items] Entity Location [Line Items] Number of operating segments Number of Operating Segments Number of geographic segments Number Of Geographic Segments Number Of Geographic Segments Advertising expenses Advertising Expense Stock-based compensation awards (shares) Share Based Compensation Award, Shares Reserved For Future Issuance Share-Based Compensation Award, Shares Reserved for Future Issuance Vesting of restricted common stock (shares) Common Stock, Capital Shares Reserved for Future Issuance Employee stock purchase plan (shares) Shares Held in Employee Stock Option Plan, Committed-to-be-Released Total (shares) Shares Reserved For Future Issuance Shares Reserved for Future Issue Restricted common stock activity Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Shares reserved for future issuance Schedule of Stock by Class [Table Text Block] Schedule of accrued expenses Schedule of Accrued Liabilities [Table Text Block] Schedule of other current liabilities Other Current Liabilities [Table Text Block] Schedule of restructuring and related costs Restructuring and Related Costs [Table Text Block] Basis of presentation Basis of Accounting, Policy [Policy Text Block] Use of estimates Use of Estimates, Policy [Policy Text Block] Principles of consolidation Consolidation, Policy [Policy Text Block] Concentrations of risk, Concentrations of credit risk and off-balance sheet risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Segment information Segment Reporting, Policy [Policy Text Block] Revenue Revenue Recognition, Policy [Policy Text Block] Accounts receivable and allowance for doubtful accounts Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Cost of product revenue Cost of Sales, Policy [Policy Text Block] Inventory Inventory, Policy [Policy Text Block] Advertising expense Advertising Costs, Policy [Policy Text Block] Shipping and handling costs Shipping and Handling Cost, Policy [Policy Text Block] Restructuring-related costs Costs Associated with Exit or Disposal Activity or Restructuring [Policy Text Block] Property and equipment Property, Plant and Equipment, Policy [Policy Text Block] Impairment of long-lived assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Research and development expense Research and Development Expense, Policy [Policy Text Block] Stock-based compensation expense Compensation Related Costs, Policy [Policy Text Block] Income taxes Income Tax, Policy [Policy Text Block] Net loss per share attributable to common stockholders Earnings Per Share, Policy [Policy Text Block] Comprehensive loss Comprehensive Income, Policy [Policy Text Block] Recent accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Subsequent events Subsequent Events, Policy [Policy Text Block] Fair value measurements Fair Value Measurement, Policy [Policy Text Block] 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] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive securities excluded from computation of earnings per share (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Effective Income Tax Rate Reconciliation, Percent [Abstract] Effective Income Tax Rate Reconciliation, Percent [Abstract] Federal income tax expense at statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent State income tax, net of federal benefit (as a percent) Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Permanent differences (as a percent) Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Stock-based compensation (as a percent) Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent Research credits (as a percent) Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Other, net (as a percent) Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent Payroll tax credit election (as a percent) Effective Income Tax Rate Reconciliation, Tax Credit, Payroll Tax Credit Election, Percent Effective Income Tax Rate Reconciliation, Tax Credit, Payroll Tax Credit Election, Percent Change in valuation allowance (as a percent) Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Deferred rate change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Effective tax rate Effective Income Tax Rate Reconciliation, Percent Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Marketable securities Marketable Securities, Current Accounts receivable Accounts Receivable, Net, Current Inventory Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Total assets Assets Liabilities and stockholders' equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued expenses and other current liabilities Deferred revenue Deferred Revenue, Current Deferred rent, current portion Deferred Rent Credit, Current Total current liabilities Liabilities, Current Deferred rent, net of current portion Deferred Rent Credit, Noncurrent Total liabilities Liabilities Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.0001 par value; 10,000,000 shares authorized at December 31, 2018 and December 31, 2017; none issued or outstanding at December 31, 2018 and December 31, 2017 Preferred Stock, Value, Issued Common stock, $0.0001 par value; 100,000,000 shares authorized at December 31, 2018 and December 31, 2017, 18,069,476 and 17,972,166 shares issued at December 31, 2018 and December 31, 2017, respectively, and 18,067,392 and 17,797,178 shares outstanding at December 31, 2018 and December 31, 2017, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity Realized gains on marketable securities Debt Securities, Available-for-sale, Realized Gain Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Corporate debt securities Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Number of debt securities held Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Aggregate fair value of securities in an unrealized loss position Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Number of debt securities in a significant unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Affiliated entity Affiliated Entity [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] License fees received Revenue from Related Parties Decrease in company workforce (as a percent) Percentage Decrease in Company Workforce Percentage Decrease in Company Workforce Accumulated deficit Preferred stock Preferred Stock [Text Block] Schedule of marketable securities Available-for-sale Securities [Table Text Block] Cash, cash equivalents and restricted cash shown on the condensed consolidated statement of cash flows Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, authorized (shares) Preferred Stock, Shares Authorized Preferred stock, issued (shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (shares) Common stock, shares issued (shares) Common Stock, Shares, Issued Common stock, shares outstanding (shares) Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, forecast Scenario, Forecast [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Ongoing termination benefits Ongoing Termination Benefits [Member] Ongoing Termination Benefits [Member] One-time termination benefits One-time Termination Benefits [Member] Retention benefits Retention Benefits [Member] Retention Benefits [Member] Other restructuring Other Restructuring [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Corporate restructuring plan Corporate restructuring plan [Member] Corporate restructuring plan [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Cash retention bonus cost Cash Retention Bonus Costs Cash Retention Bonus Costs Severance benefits Severance Costs Cash Retention Bonuses Payable Cash Retention Bonuses Payable Cash Retention Bonuses Payable Cash retention bonuses payable upon change in control Cash Retention Bonuses Payable Upon Change in Control Cash Retention Bonuses Payable Upon Change in Control Cash retention bonuses payable upon employees in good standing Cash Retention Bonuses Payable Upon Employees in Good Standing Cash Retention Bonuses Payable Upon Employees in Good Standing Severance benefits payable upon change in control and termination without cause Severance Benefits Payable Upon Change in Control and Termination Without Cause Severance Benefits Payable Upon Change in Control and Termination Without Cause Restructuring charges Restructuring Charges Restructuring charges incurred upon change in control Restructuring Charges Incurred Upon Change in Control Restructuring Charges Incurred Upon Change in Control Income taxes Income Tax Disclosure [Text Block] Summary of stock option activity Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of fair value assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of stock-based compensation expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Expected volatility (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Expected term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected dividend yield (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Accrued expenses and other current liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Summary of cash equivalents and marketable securities measured at fair value on a recurring basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Employee severance Employee Severance [Member] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Accrued restructuring balance as of December 31, 2017 Restructuring Reserve Payments Payments for Restructuring Accrued restructuring balance as of December 31, 2018 Net loss per share Earnings Per Share [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance, unvested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Issued (shares) Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending balance, unvested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning balance, unvested, weighted average grant date fair value (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Issued, weighted average grant date fair value (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested, weighted average grant date fair value (in usd 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 Forfeited, weighted average grant date fair value (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending balance, unvested, weighted average grant date fair value (in usd per share) Property and equipment, net Property, Plant and Equipment Disclosure [Text Block] Schedule of cash and cash equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Restrictions on cash and cash equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Depreciation over estimated useful life Property, Plant and Equipment [Table Text Block] Property and equipment, net Inventory Inventory Disclosure [Text Block] Cash equivalents and marketable securities Cash, Cash Equivalents, and Marketable Securities [Text Block] Schedule of segment reporting information Schedule of Segment Reporting Information, by Segment [Table Text Block] Stock-based compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Commitments and contingencies Commitments and Contingencies Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Equity Interest Type [Axis] Equity Interest Type [Axis] Equity Interest Issued or Issuable, Type [Domain] Equity Interest Issued or Issuable, Type [Domain] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Salarius Salarius [Member] Salarius [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Combined company Combined Company [Member] Combined Company [Member] Agreement and plan of merger Agreement and Plan of Merger [Member] Agreement and Plan of Merger [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Value assigned Business Acquisition, Value Assigned Business Acquisition, Value Assigned Target net cash Business Acquisition, Target Net Cash Business Acquisition, Target Net Cash Target sale price Business Acquisition, Target Sale Price Business Acquisition, Target Sale Price Ownership percentage Business Acquisition, Ownership Percentage Business Acquisition, Ownership Percentage Exercise price, below threshold (shares) Business Acquisition, Stock Options, Exercise Price, Below Threshold Business Acquisition, Stock Options, Exercise Price, Below Threshold Business Combination, Exercise Price Business Combination, Exercise Price Business Combination, Exercise Price Exercise price, above threshold (shares) Business Acquisition, Stock Options, Exercise Price, Above Threshold Business Acquisition, Stock Options, Exercise Price, Above Threshold Rights distributed (shares) Business Acquisition, Rights Distributed Business Acquisition, Rights Distributed Period to receive warrants to purchase shares Business Acquisition, Date Able To Receive Warrant To Purchase Shares Business Acquisition, Date Able To Receive Warrant To Purchase Shares Period which warrants are exercisable Class of Warrant or Right, Period which Warrants or Rights Exercisable Class of Warrant or Right, Period which Warrants or Rights Exercisable Termination fee payable Business Acquisition, Termination Fee Payable Business Acquisition, Termination Fee Payable Termination reimbursement Expense Business Acquisition, Termination Reimbursement Expense Business Acquisition, Termination Reimbursement Expense Termination fee receivable Business Acquisition, Termination Fee Receivable Business Acquisition, Termination Fee Receivable Document And Entity Information [Abstract] Document and Entity Information [Abstract] 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 Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Shell Company Entity Shell Company Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Fair value measurements Fair Value Disclosures [Text Block] Website development costs Estimated useful life Property, Plant and Equipment, Useful Life Schedule of quarterly financial information Quarterly Financial Information [Table Text Block] Subsequent events Subsequent Events [Text Block] Statement of Comprehensive Income [Abstract] Other comprehensive gain: Other Comprehensive Income (Loss), Net of Tax [Abstract] Change in net unrealized gains on available-for-sale securities Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent