StatementClassOfStock [Axis] Series A Preferred Stock Series B Preferred Stock Series C Preferred Stock StatementEquityComponents [Axis] Common Stock Additional Paid-in Capital Treasury Stock [Member] Accumulated Deficit Long-term Debt, Type [Axis] Notes Payable 1 NatureOfExpense [Axis] Research and Development Expense General and Administrative Expense Antidilutive Securities [Axis] Amended and Restated 2016 (formerly 2008) Stock Incentive Plan and 2019 Omnibus Equity Incentive Plan Warrant ClassOfWarrantOrRight [Axis] Warrant 1 Warrant 2 Warrant 3 Warrant 4 Warrant 5 Warrant 6 Warrant 7 Warrant 8 Property, Plant and Equipment, Type [Axis] Laboratory Equipment Tenant Improvements Computers and Network Equipment Office Furniture And Equipment Plan Name [Axis] 2019 Plan Range [Axis] Minimum Maximum Notes Payable 2 Related Party [Axis] Cato Research Ltd. Pherin Pharmaceuticals, Inc. Consulting Agreement Treasury Stock RelatedPartyTransactionsByRelatedParty [Axis]  Construction in progress Deferred Revenue Arrangement Type [Axis] Contract Liabilities Current Contract Liabilities Non-Current Capitalized Contract Cost [Axis] Deferred Contract Acquisition Costs: Current Deferred Contract Acquisition Costs: Non Current Cover [Abstract] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Is Entity's Reporting Status Current? Entity Filer Category Entity Emerging Growth Company Entity Small Business Entity Shell Company Entity Interactive Data Current Entity Incorporation, State or Country Code Entity File Number Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Statement [Table] Statement [Line Items] Class of Stock [Axis] ASSETS Current assets: Cash and cash equivalents Prepaid expenses and other current assets  Deferred contract acquisition costs - current portion Total current assets Property and equipment, net Right of use asset - operating lease Deferred offering costs  Deferred contract acquisition cost - non-current portion Security deposits and other assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Accounts payable Accrued expenses Current notes payable, including accrued interest  Deferred revenue - current portion Operating lease obligation - current portion Financing lease obligation - current portion Total current liabilities Non-current liabilities: Non-current portion of notes payable Accrued dividends on Series B Preferred Stock Deferred revenue - non-current portion Operating lease obligation - non-current portion Financing lease obligation - non-current portion Total non-current liabilities Total liabilities Commitments and contingencies Stockholders' equity (deficit): Preferred stock Common stock, $0.001 par value; 175,000,000 shares authorized at June 30, 2020 and March 31, 2020; 55,937,472 and 49,348,707 shares issued and outstanding at June 30, 2020 and March 31, 2020, respectively Additional paid-in capital Treasury stock, at cost, 135,665 shares of common stock held at June 30, 2020 and March 31, 2020 Accumulated deficit Total stockholders' (deficit) equity Total liabilities and stockholders' (deficit) equity Stockholders deficit: Preferred stock, par value Preferred stock, authorized Preferred stock, issued Preferred stock, outstanding Common stock, par value Common stock, authorized Common stock, issued Common stock, outstanding Treasury stock Income Statement [Abstract]  Sublicense revenue   Total revenues Operating expenses: Research and development General and administrative Total operating expenses Loss from operations Other income (expenses), net: Interest income (expense), net Other income Loss before income taxes Income taxes Net loss and comprehensive loss Accrued dividends on Series B Preferred stock Net loss attributable to common stockholders Basic and diluted net loss attributable to common stockholders per common share Weighted average shares used in computing basic and diluted net loss attributable to common stockholders per common share Statement of Cash Flows [Abstract] Cash flows from operating activities: Net loss Adjustments to reconcile net loss to net cash used in operating activities: Depreciation and amortization Stock-based compensation Amortization of fair value of common stock issued for services Amortization of fair value of warrants issued for services Changes in operating assets and liabilities: Receivable from supplier Prepaid expenses and other current assets Right of use asset - operating lease Operating lease liability   Deferred sublicense revenue, net of deferred contract acquisition costs Accounts payable and accrued expenses Net cash used in operating activities Cash flows from investing activities:   Purchases of manufacturing and other equipment Net cash used in investing activities Cash flows from financing activities: Net proceeds from issuance of common stock and warrants, including units Expense related to registration of shares underlying outstanding warrants Net proceeds from exercise of warrants Net proceeds from sale of common stock under equity line Proceeds from issuance of note under Payroll Protection Plan Repayment of capital lease obligation Repayment of notes payable Net cash provided by (used in) financing activities Net increase (decrease) in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental disclosure of noncash activites: Insurance premiums settled by issuing note payable Accrued dividends on Series B Preferred Equity Components [Axis] Beginning balance (in shares) Beginning balance Proceeds from sale of units of common stock and warrants for cash in private placement (in shares) Proceeds from sale of units of common stock and warrants for cash in private placement Net proceeds from sale of common stock under equity line (in shares) Net proceeds from sale of common stock under equity line Issuance of common stock at fair value for professional services (in shares) Issuance of common stock at fair value for professional services Sale of common stock pursuant to 2019 Employee Stock Purchase Plan (in shares) Sale of common stock pursuant to 2019 Employee Stock Purchase Plan Expenses related to S-3 registration statement for shares underlying outstanding warrants Net proceeds from exercise of warrants, shares Net proceeds from exercise of warrants, amount Accrued dividends on Series B Preferred stock Stock-based compensation expense Net loss Ending balance (in shares) Ending balance Organization, Consolidation and Presentation of Financial Statements [Abstract] Description of Business Basis of Presentation Accounting Policies [Abstract] Summary of Significant Accounting Policies Other Assets [Abstract] Prepaid Expenses and Other Current Assets Property, Plant and Equipment [Abstract] Property and Equipment Payables and Accruals [Abstract] Accrued Expenses Notes Payable [Abstract] Notes Payable Equity [Abstract] Capital Stock Related Party Transactions [Abstract] Related Party Transactions Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Sublicensing And Collaborative Agreements Sublicensing and Collaborative Agreements Subsequent Events [Abstract] Subsequent Events Use of Estimates Revenue Recognition Research and Development Expenses Stock-Based Compensation Leases, Right-of- Use Assets and Lease Liabilities Comprehensive Loss Loss per Common Share Fair Value Measurements Recent Accounting Pronouncements Changes in the contract liabilities Recognition of revenue Summary of contract acquisition costs Summary of stock-based compensation expense Fair value assumptions Schedule of potentially dilutive securities excluded from computation of earnings per share Prepaid expenses and other current assets Property and equipment Accrued expenses Notes payable Warrants outstanding Presentation of operating lease Operating lease costs Expected lease expense Other lease disclosure Supplemental disclosure of cash flow information Accumulated deficit during its development stage Contract Liabilities: Deferred Revenue, Beginning Additions Deductions Contract Liabilities: Deferred Revenue, Ending Revenue recognized in the period from: Amounts included in contract liabilities at the beginning of the period: Performance obligations satisfied New activities in the period: Performance obligations satisfied Total Revenue Deferred Contract Acquisition Costs - Beginning Additions Deductions Deferred Contract Acquisition Costs - Ending Nature of Expense [Axis] Stock option expense Statistical Measurement [Axis] Market price per share at grant date Exercise price per share Risk-free interest rate Estimated term in years Volatility Dividend rate Shares Fair value per share Antidilutive securities Clinical and nonclinical materials and contract services Fair value of securities issued for professional services Insurance All other Total Long-Lived Tangible Asset [Axis] Property and equipment, gross Accumulated depreciation and amortization Property And Equipment Office equipment subject to financing lease Accumulated depreciation Net book value of office equipment subject to financing lease Accrued expenses for clinical and nonclinical materials, development and contract services Accrued professional services All other Total Principal balance Accrued interest Total Current portion Non-current portion Class of Warrant or Right [Axis] Average per share Expiration date range Warrants outstanding Warrants exercisable Related party expense Research and development expense Accounts payable and accrued expenses Assets Liabilities Current operating lease obligation Non-current operating lease obligation Total operating lease liability Operating lease cost 2021 (remaining six months) 2022 2023 2024 2025 Thereafter Total lease expense Less imputed interest Present value of operating lease liabilities Assumed remaining lease term in years Assumed discount rate Cash paid for amounts included in the measurement of lease liabilities Rent expense Information about property i.e. tenant improvements. Assets, Current Assets Liabilities, Current Liabilities, Noncurrent Liabilities [Default Label] Treasury Stock, Value Stockholders' Equity Attributable to Parent Liabilities and Equity Operating Expenses Operating Income (Loss) Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income Tax Expense (Benefit) Preferred Stock Dividends and Other Adjustments Net Income (Loss) Available to Common Stockholders, Basic Increase (Decrease) in Other Receivables Increase (Decrease) in Prepaid Expense and Other Assets Increase (Decrease) in Other Operating Assets Net Cash Provided by (Used in) Operating Activities Payments to Acquire Machinery and Equipment Net Cash Provided by (Used in) Investing Activities Payments of Financing Costs Repayments of Long-term Capital Lease Obligations Repayments of Notes Payable Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) Stock Issued During Period, Value, Other Dividends, Preferred Stock, Cash Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Schedule of Accrued Liabilities [Table Text Block] Deferred Revenue Deferred Revenue, Refund Payments Deferred Costs Deferred Policy Acquisition Cost, Capitalization Deferred Policy Acquisition Costs, Disposition Prepaid Expense and Other Assets, Current Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Capital Leases, Balance Sheet, Assets by Major Class, Net Other Accrued Liabilities, Current Class of Warrant or Right, Outstanding Accounts Payable, Related Parties Lessee, Operating Lease, Liability, to be Paid Lessee, Operating Lease, Liability, Undiscounted Excess Amount