Document and Entity Information [Abstract] Document Information [Table] Document Information [Line Items] Document Type Document Period End Date Entity Registrant Name Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Interactive Data Current Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Common Stock, Shares Outstanding Entity Public Float Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Central Index Key Amendment Flag Statement of Financial Position [Abstract] Statement [Table] Statement [Line Items] Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash Cash at end of period Cash at beginning of period Prepaid Expense and Other Assets, Current Prepaid and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Equipment, net Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and stockholders? equity Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accounts Payable and Other Accrued Liabilities, Current Accrued expenses and other current liabilities Total Long-term Debt, Current Maturities Loan payable, current portion Loan payable, current portion Liabilities, Current Total current liabilities Long-term Debt, Excluding Current Maturities Loan payable, long-term Loan payable, long-term Liabilities Total liabilities Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Issued Preferred stock, $0.0001 par value per share (10,000,000 shares authorized, none issued and outstanding at December 31, 2019 and December 31, 2018, respectively) Common Stock, Value, Issued Common stock, $0.0001 par value per share (150,000,000 shares authorized, 36,933,217 and 30,087,213 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively) Value of common stock Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated deficit Stockholders' Equity Attributable to Parent Ending balance Beginning balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Preferred Stock, Par or Stated Value Per Share Preferred stock, par value 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 or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Balance (in shares) Balance (in shares) Common stock, shares issued Number of common shares Common Stock, Shares, Outstanding Common stock, shares outstanding Income Statement [Abstract] Operating Expenses [Abstract] Operating expenses: Research and Development Expense Research and development General and Administrative Expense General and administrative Operating Expenses Total operating expenses Total operating expenses Operating Income (Loss) Loss from operations Investment Income, Net Interest and amortization of debt discount (expense) Represents the amount of other income from NYC Biotechnology Credit. Income From N Y C Biotechnology Credit Tax credit Fair Value Adjustment of Warrants Change in fair value of warrant liabilities Change in fair value of warrants Net Income (Loss) Attributable to Parent Net loss Net loss Earnings Per Share, Basic and Diluted Net loss per common share, basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Weighted average common shares outstanding, basic and diluted Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid In Capital [Member] Additional paid-in capital Retained Earnings [Member] Accumulated deficit Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation Value of warrants exercised during the period. Stock Warrants Exercised During Period Value Exercise of warrants Number of warrants issued during the period. Stock Warrants Exercised During Period Shares Exercise of warrants (in shares) Stock Issued During Period, Value, Stock Options Exercised Issuance of common stock upon exercise of options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised (in shares) Issuance of common stock upon exercise of options (in shares) Value of warrants issued during period with debt financing. Warrants Issued During Period, Debt Financing Issuance of warrants upon debt financing Value of stock issued pursuant to a financing arrangement during the period. Stock Issued During Period, Value, Financing Issuance of common stock upon financing Number of shares of stock issued during the period pursuant to a financing arrangement. Stock Issued During Period Shares Financing Issuance of common stock upon financing (in shares) Statement of Cash Flows [Abstract] 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, Noncash Items, 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: Share-based Compensation Stock-based compensation expense Amortization of Debt Discount (Premium) Amortization of debt discount Depreciation Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: The increase (decrease) during the reporting period in the value of prepaid expenses and other current assets not separately disclosed in the statement of cash flows, for example, deferred expenses, intangible assets, or income taxes. Increase (Decrease) in Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Increase (Decrease) in Other Noncurrent Assets Other assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Accrued expenses and other current liabilities 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 Purchases of 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 Payments of Debt Issuance Costs Payment of debt issuance costs Proceeds from Issuance of Common Stock Procceds from issuance of common stock upon financing, net Proceeds from Issuance of Long-term Debt Proceeds from issuance of term loan Proceeds from (Repayments of) Notes Payable Repayment of principal on term loan Repayment of principal on term loan Proceeds from Stock Options Exercised Proceeds from issuance of common stock upon exercise of options Proceeds from Warrant Exercises Proceeds issuance of common stock upon exercise of warrants Net Cash Provided by (Used in) Financing Activities Net cash (used in) provided by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net (decrease) increase in cash Supplemental Cash Flow Information [Abstract] Supplemental disclosures of cash flow information: Interest Paid, Excluding Capitalized Interest, Operating Activities Interest paid Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosures of non-cash financing activity: Represents the establishment of a warrant liability with the issuance of common stock. Warrant Liability With Common Stock Issuance Establishment of warrant liabilities in connection with common stock issuance Warrants issued with debt financing. Warrants Issued With Debt Financing Issuance of warrants in connection with debt financing Nature of Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Nature of Business and Basis of Presentation Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Net Loss per Common Share Earnings Per Share [Text Block] Net Loss per Common Share Accrued Expenses and Other Current Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses and Other Current Liabilities Debt Disclosure [Abstract] Long-term Debt [Text Block] Loan and Security Agreement Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Warrants The entire disclosure for warrants and rights. Warrants and Rights Note Disclosure [Text Block] Warrants License Agreements. The entire disclosure for license agreements. License Agreements Disclosure [Text Block] License Agreements Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Income Taxes Income Tax Disclosure [Text Block] Income Taxes Related-Party Transactions Related Party Transactions Disclosure [Text Block] Related-Party Transactions Quarterly Consolidated Financial Data (Unaudited) Quarterly Financial Information [Text Block] Quarterly Consolidated Financial Data (Unaudited) Subsequent Events Subsequent Events [Text Block] Subsequent Event Disclosure of accounting policy for significant risks and uncertainties. Significant Risks and Uncertainties, Policy, [Policy Text Block] Significant Risks and Uncertainties Use of Estimates, Policy [Policy Text Block] Use of Estimates Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Translation Segment Reporting, Policy [Policy Text Block] Segment and Geographic Information Cash and Cash Equivalents, Policy [Policy Text Block] Cash Equivalents Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Credit Risk Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Debt, Policy [Policy Text Block] Debt Issuance Costs Property, Plant and Equipment, Policy [Policy Text Block] Equipment Research and Development Expense, Policy [Policy Text Block] Research and Development Costs Income Tax, Policy [Policy Text Block] Income Taxes Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock Based Compensation Disclosure of accounting policy for tax credits. Tax Credit, Policy [Policy Text Block] Tax Credit Earnings Per Share, Policy [Policy Text Block] Basic and Diluted Net Loss per Common Share New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Computation of basic and diluted net loss per common share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of potentially dilutive securities Accrued Expenses Schedule of Accrued Liabilities [Table Text Block] Schedule of accrued expenses Schedule of Long-term Debt Instruments [Table Text Block] Schedule of outstanding debt and unamortized debt discount balances Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of principal payments Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of stock option activity Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of Black-Scholes option valuation assumptions Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of stock-based compensation expense Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Schedule of warrant activity Fair Value Inputs, Instruments Classified in Shareholders' Equity, Quantitative Information [Table Text Block] Summary of warrant fair value inputs Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of components of deferred tax assets Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of income tax rate reconciliation Schedule of Quarterly Financial Information [Table Text Block] Summary of quarterly consolidated financial data Represents the number of late-stage candidates included in the Company's product candidate portfolio. Number of Late-stage Product Candidates Number of late-stage candidates in Company's product candidate portfolio Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] Segment and Geographic Information Number of Operating Segments Number of operating segments Cash Equivalents, at Carrying Value [Abstract] Cash Equivalents Cash Equivalents, at Carrying Value Cash Equivalents Property, Plant and Equipment [Abstract] Equipment Property, Plant and Equipment, Useful Life Estimated useful life Fair Value Measurements, Recurring and Nonrecurring [Table] Class of Warrant or Right [Axis] Class Of Warrant Or Right [Domain] Class of Warrant or Right [Domain] Represents common warrants. Common Warrants [Member] Common warrants Represents placement agent warrants. Placement Agent Warrants [Member] Placement agent warrants Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Number of warrants (or share units) issued during the current period. Warrants Issued In Period Warrants issued Warrants and Rights Outstanding, Measurement Input Warrant measurement input The fair value of outstanding warrants. Fair Value Of Warrants Fair value Share Price Class of Warrant or Right, Exercise Price of Warrants or Rights Ending balance (in dollars per share) Beginning balance (in dollars per share) Exercise price of warrants (in dollars per share) Earnings Per Share, Basic and Diluted [Abstract] Basic and diluted net loss per common share: Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] Employee Stock Option [Member] Stock Options Warrant [Member] Warrants Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive securities Carrying value as of the balance sheet date of obligations incurred through that date and payable for research and development. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Research and Development, Current Research and development Employee-related Liabilities, Current Accrued compensation