Entity Central Index Key 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 Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Well-known Seasoned Issuer Entity Well Known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Public Float Entity Public Float Accrued expenses and other current liabilities. Statement Of Financial Position [Abstract] Assets Assets [Abstract] Current assets Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Marketable securities Marketable Securities Current Accounts receivable Accounts Receivable Gross Current Prepaid expenses Prepaid Expense Current Other current assets Other Assets Current Total current assets Assets Current Marketable securities Marketable Securities Noncurrent Property and equipment, net Property Plant And Equipment Net Cost method investments Cost Method Investments Restricted cash Restricted Cash And Cash Equivalents Noncurrent Other assets Other Assets Noncurrent Total assets Assets Liabilities and Stockholders’ Equity Liabilities And Stockholders Equity [Abstract] Current liabilities Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses and other current liabilities Accrued Expenses And Other Current Liabilities Advance payments Customer Advances Current Total current liabilities Liabilities Current Deferred rent, net of current portion Deferred Rent Credit Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 6) Commitments And Contingencies Stockholders’ equity Stockholders Equity [Abstract] Preferred stock; $0.0001 par value; 10,000 shares authorized, and no shares issued and outstanding at December 31, 2016 and December 31, 2015 Preferred Stock Value Common stock; $0.0001 par value; 100,000 shares authorized at December 31, 2016 and December 31, 2015; 26,477 and 26,313 shares issued and outstanding at December 31, 2016 and December 31, 2015, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated deficit Retained Earnings Accumulated Deficit Total stockholders’ equity Stockholders Equity Total liabilities and stockholders’ equity Liabilities And Stockholders Equity Preferred stock, par value Preferred Stock Par Or Stated Value Per Share Preferred stock, shares authorized Preferred Stock Shares Authorized Preferred stock, shares issued Preferred Stock Shares Issued Preferred stock, shares outstanding Preferred Stock Shares Outstanding Common stock, par value 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 Grants revenue (expenses.) Net gain on extinguishment of preferred stock for earnings per share. Income Statement [Abstract] Revenues Revenues [Abstract] License revenue Licenses Revenue License revenue from related party Revenue From Related Parties Reagent sales Other Sales Revenue Net Grant revenue Grants Revenue Expenses Total revenues Revenues Expenses Costs And Expenses [Abstract] Costs of revenues Cost Of Revenue [Abstract] Licensing costs (including amounts to related parties) Related Party Costs Costs of reagent sales (including amounts to related parties) Cost Of Goods Sold Research and development (including amounts to related parties) Research And Development Expense General and administrative (including amounts to related parties) General And Administrative Expense Other operating expenses (income) Other Operating Income Expense Net Total operating expenses Costs And Expenses Loss from operations Operating Income Loss Other Income (Expense) Nonoperating Income Expense [Abstract] Investment income Investment Income Net Interest expense Interest Expense Total other income (expense) Nonoperating Income Expense Loss before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income Tax Benefit Income Tax Expense Benefit Net loss Net Income Loss Other Comprehensive Income (Loss) Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Unrealized gain (loss) on available-for-sale securities, net of income tax expense of $435 for the year ended December 31, 2016 Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Total other comprehensive income (loss) Other Comprehensive Income Loss Net Of Tax Comprehensive loss Comprehensive Income Net Of Tax Reconciliation of net loss to net loss applicable to common stockholders Net Income Loss Available To Common Stockholders Basic [Abstract] Net loss Net accretion and dividends on convertible preferred stock Preferred Stock Dividends And Other Adjustments Net gain on extinguishment of convertible preferred stock Net Gain On Extinguishment Of Preferred Stock For Earnings Per Share Net loss applicable to common stockholders Net Income Loss Available To Common Stockholders Basic Basic and diluted net loss per common share Earnings Per Share Basic And Diluted Weighted-average basic and diluted common shares Weighted Average Number Of Share Outstanding Basic And Diluted Unrealized gain on available-for-sale securities, income tax expense Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax Temporary equity converted during period shares. Amount of increase (decrease) in temporary equity as Part of reorganization. Preferred stock accretion (decrement) of redemption discount. Discount on related party promissory notes. Stock issued during period value new issuance cost. Gain loss on extinguishment of convertible preferred stock. Discount on related party promissory notes values. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Series A Preferred Stock [Member] Series A Preferred Stock [Member] Series B Preferred Stock [Member] Series B Preferred Stock [Member] Series A convertible preferred stock. Series A Convertible Preferred Stock [Member] Series A Convertible Preferred Stock [Member] Series B convertible preferred stock. Series B Convertible Preferred Stock [Member] Series B Convertible Preferred Stock [Member] Series C convertible preferred stock. Series C Convertible Preferred Stock [Member] Series C Convertible Preferred Stock [Member] Series D convertible preferred stock. Series D Convertible Preferred Stock [Member] Series D Convertible Preferred Stock [Member] Convertible Preferred Stock And Preferred Units. Convertible Preferred Stock And Preferred Units [Member] Convertible Preferred Stock And Preferred Units [Member] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Class A Units. Class A Units [Member] Class A Units [Member] Common Stock [Member] Common Stock [Member] Additional paid in capital [Member] Additional Paid In Capital [Member] Accumulated Other Comprehensive Loss [Member] Accumulated Other Comprehensive Income [Member] Accumulated Deficit [Member] Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Balances Redeemable Noncontrolling Interest Equity Preferred Carrying Amount Balances (Shares) Balances Balances (Shares) Shares Outstanding Conversion from LLC to C corporation, Shares Temporary Equity Converted During Period Shares Conversion from LLC to C corporation Temporary Equity Changes As Part Of Reorganization Issuance of convertible preferred stock, shares Stock Issued During Period Shares New Issues Issuance of convertible preferred stock, net of transaction costs Stock Issued During Period Value New Issues Issuance of convertible preferred stock for the conversion of outstanding related party debt, Shares Stock Issued During Period Shares Conversion Of Units Issuance of convertible preferred stock for the conversion of outstanding related party debt Stock Issued During Period Value Conversion Of Units Issuance of convertible preferred stock, net of transaction costs Stock Issued During Period Value New Issuance Cost Loss (gain) on extinguishment of convertible preferred stock Gain Loss On Extinguishment Of Convertible Preferred Stock Accretion of preferred units Preferred Stock Accretion Decrement Of Redemption Discount Conversion of convertible preferred stock into common stock upon initial public offering, Shares Stock Issued During Period Shares Conversion Of Convertible Securities Conversion of convertible preferred stock into common stock upon initial public offering Stock Issued During Period Value Conversion Of Convertible Securities Discount on related party promissory notes Discount On Related Party Promissory Notes Discount on Related Party Promissory Notes Discount On Related Party Promissory Notes Values Exercise of stock options, Shares Stock Issued During Period Shares Stock Options Exercised Exercise of stock options Stock Issued During Period Value Stock Options Exercised Stock-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Unrealized (loss) gain on available-for-sale securities, net of income tax expense Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax Balances Balances (Shares) Transaction costs associated with stock issuance. Issuance of Stock, transaction costs Transaction Costs Associated With Stock Issuance Balances Balances (Shares) Increase decrease in deferred rent payable. Deferred issuance costs for potential public offering of common stock in accrued expenses. Conversion of related party accrued service fees to convertible preferred stock. Deferred issuance costs for convertible preferred stock in accrued expenses. Statement Of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided By Used In Operating Activities Continuing Operations [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] Stock-based compensation expense Share Based Compensation Net amortization of premiums and accretion of discounts on marketable debt securities Accretion Amortization Of Discounts And Premiums Investments Depreciation and amortization Depreciation And Amortization Other non-cash adjustments Other Noncash Income Expense Changes in operating assets and liabilities Increase Decrease In Operating Capital [Abstract] Accounts receivable Increase Decrease In Accounts Receivable Prepaid expenses Increase Decrease In Prepaid Expense Other current assets Increase Decrease In Other Current Assets Other assets Increase Decrease In Other Operating Assets Accounts payable Increase Decrease In Accounts Payable Trade Accrued expenses and other current liabilities Increase Decrease In Accrued Liabilities And Other Operating Liabilities Due to related party under services agreement Increase Decrease In Accounts Payable Related Parties Other related party payables Increase Decrease In Due To Other Related Parties Current Advance payments Increase Decrease In Customer Advances Deferred rent Increase Decrease In Deferred Rent Payable Net cash used in operating activities Net Cash Provided By Used In Operating Activities Continuing Operations Cash flows from investing activities Net Cash Provided By Used In Investing Activities Continuing Operations [Abstract] Restricted cash Increase Decrease In Restricted Cash Purchases of marketable securities Payments To Acquire Marketable Securities Maturities of marketable securities Proceeds From Sale And Maturity Of Marketable Securities Sales of marketable securities Proceeds From Sale And Maturity Of Available For Sale 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 Continuing Operations Cash flows from financing activities Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract] Proceeds from exercise of stock options Proceeds From Stock Options Exercised Issuance costs for potential public offering of common stock Payments Of Stock Issuance Costs Proceeds from issuance of convertible preferred stock, net of transaction costs Proceeds From Issuance Of Convertible Preferred Stock Proceeds from initial public offering of common stock, net of transaction costs Proceeds From Issuance Initial Public Offering Proceeds from related party promissory notes Proceeds From Related Party Debt Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Continuing Operations Net increase (decrease) in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents Cash And Cash Equivalents [Abstract] Beginning of period End of period Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Supplemental disclosures of non-cash investing and financing activities Noncash Investing And Financing Items [Abstract] Purchases of property and equipment in accounts payable and accrued expenses Capital Expenditures Incurred But Not Yet Paid Deferred issuance costs for potential public offering of common stock in accrued expenses Deferred Issuance Costs For Potential Public Offering Of Common Stock In Accrued Expenses Conversion of accrued service fees to related party Conversion Of Related Party Accrued Service Fees To Convertible Preferred Stock Conversion of related party promissory notes into Series C convertible preferred stock Debt Conversion Converted Instrument Amount1 Conversion of convertible preferred stock into common stock upon initial public offering Conversion Of Stock Amount Converted1 Deferred issuance costs for Series C convertible preferred stock in accrued expenses Deferred Issuance Costs For Convertible Preferred Stock In Accrued Expenses Organization Consolidation And Presentation Of Financial Statements [Abstract] Nature of Business Nature Of Operations Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Investments Debt And Equity Securities [Abstract] Marketable Securities Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Property Plant And Equipment [Abstract] Property and Equipment, Net Property Plant And Equipment Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Equity [Abstract] Capitalization Stockholders Equity Note Disclosure [Text Block] Significant Agreements Collaborative Arrangement Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Postemployment Benefits [Abstract] Retirement Plan Postemployment Benefits Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Related Party Transactions [Abstract]