No definition available. Document and Entity Information [Abstract] Document Type Document Period End Date Entity Registrant Name Entity Current Reporting Status Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Consolidated Balance Sheets Assets [Abstract] Assets Assets, Current [Abstract] CURRENT ASSETS Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Restricted Cash, Current Restricted cash Other Assets, Current Other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Other Assets, Noncurrent Other assets Assets TOTAL ASSETS Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] LIABILITIES Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued liabilities Total Operating Lease, Liability, Current Operating lease liabilities, current portion Liabilities, Current Total current liabilities Carrying value as of the balance sheet date of obligations incurred through that date and due beyond one year (or beyond one operating cycle if longer) for milestone and royalty payments. Accrued Milestone and Royalty Payments, Noncurrent Accrued milestone and royalty payments Operating Lease, Liability, Noncurrent Operating lease liabilities, long-term portion Other Liabilities, Noncurrent Other liabilities Liabilities TOTAL LIABILITIES Commitments and Contingencies Commitments and contingencies (Note 6) Stockholders' Equity Attributable to Parent [Abstract] STOCKHOLDERS? EQUITY Preferred Stock, Value, Issued Preferred stock, $0.0001 par value, 5,500,000 shares authorized at June 30, 2019 and December 31, 2018; none issued at June 30, 2019 and December 31, 2018 Common Stock, Value, Issued Common stock, $0.0001 par value, 100,000,000 shares authorized at June 30, 2019 and December 31, 2018; 34,193,666 shares issued and outstanding at June 30, 2019, and December 31, 2018 Additional Paid in Capital. Additional paid in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income/(loss) Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated deficit Stockholders' Equity Attributable to Parent Balance at the end of period Balance at the beginning of period TOTAL STOCKHOLDERS' EQUITY Liabilities and Equity TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, authorized shares Preferred Stock, Shares Issued Preferred stock, shares issued Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, authorized shares Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Balance at the end of period (in shares) Balance at the beginning of period (in shares) Common stock, shares outstanding Consolidated Statements of Net Loss and Comprehensive Loss Operating Expenses [Abstract] OPERATING EXPENSES Research and Development Expense. Research and development General and Administrative Expense. General and administrative Operating Expenses Total operating expenses Operating Income (Loss) Loss from operations Other Nonoperating Income (Expense) [Abstract] OTHER INCOME/(EXPENSES) Other Nonoperating Income (Expense) Interest and other income/(expenses) Net Income (Loss) Attributable to Parent Net loss NET LOSS Net loss (numerator) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income/(loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation Comprehensive Income (Loss), Net of Tax, Attributable to Parent COMPREHENSIVE LOSS Earnings Per Share, Basic and Diluted Net loss per share attributable to common stockholders, basic and diluted Basic and diluted net loss per share (in dollars per share) Weighted Average Number of Shares Outstanding, Basic and Diluted Weighted average common shares outstanding, basic and diluted Weighted-average shares (denominator) Consolidated Statements of Changes in Stockholders? Equity Statement [Table] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition Stock-based compensation expense Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Share-based Compensation. Stock-based compensation Foreign Currency Transaction Gain (Loss), before Tax Foreign currency transactions Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) in Other Current Assets Other current assets Increase (Decrease) in Other Noncurrent Assets Other assets Increase (Decrease) in Accounts Payable Accounts payable The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid and other liabilities. Increase (Decrease) In Accrued Liabilities And Other Accrued liabilities and other Net Cash Provided by (Used in) Operating Activities NET CASH USED IN OPERATING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] CASH FLOWS FROM INVESTING ACTIVITIES Payments to Acquire Property, Plant, and Equipment Purchase of property and equipment Net Cash Provided by (Used in) Investing Activities NET CASH USED IN INVESTING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES Proceeds from Issuance of Common Stock Proceeds from issuance of common stock, net of issuance costs Payments of Stock Issuance Costs Payment of offering costs Net Cash Provided by (Used in) Financing Activities NET CASH USED IN FINANCING ACTIVITIES Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Effect of exchange rates on cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at the end of period Cash, cash equivalents and restricted cash at the beginning of period Noncash Investing and Financing Items [Abstract] SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES Capital Expenditures Incurred but Not yet Paid Property and equipment purchases in accounts payable Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use assets obtained in exchange for lease obligations The amount of deferred offering costs that were incurred during a noncash or partial noncash transaction, included in other assets and accounts payable and accrued liabilities and other . Noncash or Partial Noncash Transaction, Deferred Offering Costs Included In Other Assets And Accounts Payable And Accrued Liabilities And Other Deferred offering costs included in other assets and accounts payable and accrued liabilities and other NA ORGANIZATION AND DESCRIPTION OF BUSINESS Nature of Operations [Text Block] ORGANIZATION AND DESCRIPTION OF BUSINESS NA BASIS OF PRESENTATION Basis of Accounting [Text Block] BASIS OF PRESENTATION SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES NET LOSS PER SHARE Earnings Per Share [Text Block] NET LOSS PER SHARE ACCRUED LIABILITIES Accounts Payable and Accrued Liabilities Disclosure [Text Block] ACCRUED LIABILITIES No definition available. LICENSE AGREEMENTS AND COMMITMENTS Collaborative Arrangement Disclosure [Text Block] LICENSE AGREEMENTS AND COMMITMENTS STOCKHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] STOCKHOLDERS' EQUITY SHARE-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] SHARE-BASED COMPENSATION RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] RELATED PARTY TRANSACTIONS INCOME TAXES Income Tax Disclosure [Text Block] INCOME TAXES No definition available. OTHER BENEFITS The entire disclosure for other benefits including retirement benefits and health insurance benefits. Other Benefits Disclosure [Text Block] OTHER BENEFITS Lessee, Leases [Policy Text Block] Operating Leases Use of Estimates, Policy [Policy Text Block] Use of Estimates Segment Reporting, Policy [Policy Text Block] Segment Information New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Pronouncements Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of basic and diluted net loss per share Schedule of Accrued Liabilities [Table Text Block] Summary of accrued short-term liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Maturities of operating lease liabilities Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Future minimum lease payments, Prior to adoption of Topic 842 Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Awards Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of common stock options issued and outstanding Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of restricted stock units issued and outstanding Number of product development programs for which entity has obtained exclusive rights. Number Of Product Development Programs Number of product development programs for which entity has obtained exclusive rights Residual Value of Leased Asset Residual value guarantees Number of Operating Segments Number of operating segments New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New accounting pronouncements Lease, Practical Expedients, Package [true false] Lease, Practical Expedients, Package Operating Lease, Liability Lease liability Total operating lease liabilities Number of lease agreements entered into during the period. Operating Lease, Number of Lease Agreements Number of lease agreements entered into during the period Amount of increase in lease liability during the period upon entering into new operating lease agreement. Operating Lease Liability Additions Increase in lease liability upon entering into new lease agreements Amount of increase in right-of-use assets during the period upon entering into new operating lease agreement. Operating Lease, Right of Use Asset, Additions Increase in right-of-use assets upon entering into new lease agreements Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] LOSS PER SHARE Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Potentially dilutive securities outstanding Accrued Liabilities, Current [Abstract] Accrued short term liabilities Carrying value as of the balance sheet date of obligations incurred through that date and payable for milestone payments. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Milestone Payments Current Accrued milestone payments Accrued milestone payments, current Carrying value as of the balance sheet date of obligations incurred through that date and payable for clinical costs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Clinical Costs Current Accrued clinical costs Carrying value as of the balance sheet date of obligations incurred through that date and payable for compensation and board fees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Compensation And Board Fees Current Accrued compensation and board fees Accrued Rent, Current Accrued rent Carrying value as of the balance sheet date of obligations incurred through that date and payable for manufacturing costs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Manufacturing Costs, Current Accrued manufacturing costs Other Accrued Liabilities, Current Other Represents the number of license agreements. Number of License Agreements Number of license agreements Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table] Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Agreements Number of new stock issued to the strategic partner during the period. Stock Issued During Period, Shares, New Issues To Strategic Partner Issuance of common stock to strategic partner (in shares) Represents the annual minimum royalties payable from fifth anniversary under collaborative arrangement. Collaborative Arrangement Annual Minimum Royalties Payable from Fifth Anniversary Annual minimum royalties payable from fifth anniversary Royalty Expense Expensed minimum royalty payments Represents the clinical milestone payments potentially due under collaborative arrangement. Collaborative Arrangement, Clinical Milestone Payments Due Clinical milestones potentially due Represents the regulatory milestone payments potentially due under collaborative arrangement. Collaborative Arrangement, Regulatory Milestone Payments Due Regulatory milestones potentially due Represents the sales based milestones payments potentially due under collaborative arrangement. Collaborative Arrangement, Sales Based Milestone Payments Due Sales-based milestones potentially due Amount paid during the period for milestones under collaborative arrangement. Collaborative Arrangement, Milestone Payment Milestone payment Amount charged for clinical milestone expense during the period under collaborative arrangement. Collaborative Arrangement, Clinical Milestone Expense Clinical milestone expense Amount paid during the period for clinical milestones under collaborative arrangement. Collaborative Arrangement, Clinical Milestone Payment Clinical milestone payment Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for milestone payments. Accrued Milestone Payments, Noncurrent Accrued milestone payments, noncurrent Represents the annual minimum royalties payable under collaborative arrangement. Collaborative Arrangement Annual Minimum Royalties Payable Annual minimum royalties payable Represents the annual minimum royalties payable from tenth anniversary under collaborative arrangement. Collaborative Arrangement Annual Minimum Royalties Payable from Tenth Anniversary Annual minimum royalties payable from tenth anniversary Represents the payment of license fee under collaborative arrangement. Collaborative Arrangement License Fee Paid License fee paid Represents the additional license fee payable at first anniversary under collaborative arrangement. Collaborative Arrangement Additional License Fee Payable At First Anniversary Additional license fee payable at first anniversary Amount charged for license fee expense during the period under collaborative arrangement. Collaborative Arrangement, License Fee Expense License fee expense Amount of continuation fee expense under the terms of the agreement. Collaborative Arrangement Accrued Continuation Fee Expense Continuation fee Represents the development milestone payments due under collaborative arrangement. Collaborative Arrangement, Development Milestone Payments Due Development milestone payments due Represents the research service period under collaborative arrangement. Collaborative Arrangement Research Service Period Research service period Represents the number of core facility service agreements. Number of Core Facility Service Agreements Number of core facility service agreements Number of individuals. Number of Individuals Number of individuals Lessee, Lease, Description [Table] Lessee, Lease, Description [Line Items] Leases Area of Real Estate Property Leased area (in square feet) Lessee, Operating Lease, Term of Contract Lease term Lessee, Operating Lease, Existence of Option to Extend [true false] Option to extend Lessee, Operating Lease, Renewal Term Option to extend, period Amount of fixed rent payable per annum under the terms of the lease agreement. Fixed Rent Payable, Per Annum Fixed rent payable per annum Represents the amount of lease payable per month. Lease Payable Per Month Lease payable per month Operating Lease, Cost Operating lease costs Operating Leases, Rent Expense, Net Rental expense for operating leases Operating Lease, Payments Cash paid for amounts included in the measurement of lease liabilities Operating Lease Liabilities, Payments Due [Abstract] Future minimum commitments under all non-cancelable operating leases Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Remainder of 2019 Lessee, Operating Lease, Liability, Payments, Due Year Two 2020 Lessee, Operating Lease, Liability, Payments, Due Year Three 2021 Lessee, Operating Lease, Liability, Payments, Due Year Four 2022 Lessee, Operating Lease, Liability, Payments, Due Year Five 2023 Lessee, Operating Lease, Liability, Payments, Due after Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due Total lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less: Imputed interest Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Future minimum commitments under all non-cancelable operating leases, 2018