Equity Components [Axis] Common Stock [Member] Additional Paid-In Capital [Member] Accumulated Deficit [Member] Preferred Stock [Member] Related Party [Axis] Corlyst [Member] Debt Instrument [Axis] Senior Convertible Notes [Member] Subscription Receivable [Member] Stock Option and Purchase Warrants [Member] Legal Entity [Axis] Contract Research Organization [Member] Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Filer Category Entity Small Business Flag Entity Emerging Growth Company Entity Ex Transition Period Entity Common Stock, Shares Outstanding Trading Symbol Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] ASSETS Current Assets Cash and cash equivalents Due from related party Prepaid expenses and other Total Current Assets Property and equipment, net Operating lease right-of-use assets, net Intangible assets, net Security deposit Total Assets LIABILITIES AND STOCKHOLDERS' EQUITY Current Liabilities Senior convertible notes Current maturities of operating lease liability Accrued interest Accounts payable Accrued expenses Total Current Liabilities Non-current Liabilities Noncurrent operating lease liability Net deferred tax liability Total Liabilities Commitments and Contingencies Stockholders' Equity Preferred stock, par value $0.0001, 10,000,000 shares authorized; no shares issued and outstanding Common stock, par value $0.0001, 350,000,000 shares authorized; 38,674,265 issued and outstanding at both March 31, 2019 and December 31, 2018 Additional paid-in capital Stock subscription receivable Accumulated deficit Total Stockholders' Equity Total Liabilities and Stockholders' Equity Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock, par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Income Statement [Abstract] Operating Expenses: Research and development General and administrative Operating Loss Other Income (Expense): Interest expense Interest income Net Operating Loss Before Income Tax Benefit Income Tax Benefit Net Loss Net Loss Per Common Share - Basic and Diluted Weighted Average Common Shares Used to Compute Net Loss Per Common Shares - Basic and Diluted Statement [Table] Statement [Line Items] Balance Balance, shares Recognize the fair value of the license acquired from CoNCERT in exchange for 2,090,301 common shares of Processa held by Promet Stock-based compensation Payments made directly by investor for clinical trial costs Net loss Balance Balance, shares Statement of Stockholders' Equity [Abstract] Common stock, shares exchanged Statement of Cash Flows [Abstract] Cash Flows From Operating Activities Adjustments to reconcile net loss to net cash used in operating activities: Depreciation Amortization of right-of-use assets Amortization of debt issuance costs Amortization of intangible asset Deferred income tax benefit Stock-based compensation Payments made directly to our Contract Research Organization by an investor in partial satisfaction of their stock subscription receivable Net changes in operating assets and liabilities: Prepaid expenses Current portion of operating lease liability Accrued interest Accounts payable Due (from) to related parties Accrued expenses Net cash used in operating activities Cash Flows From Investing Activities Purchase of intangible asset Net cash provided by (used in) investing activities Net Decrease in Cash Cash and Cash Equivalents - Beginning of Period Cash and Cash Equivalents - End of Period Non-Cash Investing and Financing Activities: Right-of-use asset obtained in exchange for operating lease liability Reduction in deferred lease liability Operating lease liability Recognize the exclusive license intangible asset acquired from CoNCERT Recognize deferred tax liability for basis difference of Intangible asset Recognize additional paid-in-capital for consideration paid from the transfer of 2,090,301 common shares of Processa released by Promet to CoNCERT for Processa Net Common stock, shares transferred Accounting Policies [Abstract] Organization and Summary of Significant Accounting Policies Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets Income Tax Disclosure [Abstract] Income Taxes Share-based Payment Arrangement [Abstract] Stock-based Compensation Debt Disclosure [Abstract] Senior Convertible Notes Earnings Per Share [Abstract] Net Loss Per Share of Common Stock Leases [Abstract] Operating Leases Related Party Transactions [Abstract] Related Party Transactions Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Business Activities and Organization Basis of Presentation Going Concern and Management's Plan Use of Estimates Intangible Assets Impairment of Long-lived Assets and Intangibles Other Than Goodwill Stock-based Compensation Net Loss Per Share Research and Development Recently Adopted Accounting Pronouncements Summary of Intangible Assets Schedule of Earnings Per Share Basic and Diluted Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Weighted Average Remaining Lease Terms and Discount Rate for Our Operating Leases Schedule of Maturities of Lease Liabilities for All Operating Leases Net income loss Net cash used in operating activities Clinical Trial Funding commitment from investor capital Impairment of Long-Lived Assets Right-of-use asset Lease obligations Amortization expense Weighted average amortization period for intangible asset Future amortization expense, year two Future amortization expense,thereafter Purchase price Transaction costs Capitalized cost Business combination of tax basis Gross intangible assets Less: accumulated amortization Total intangible assets, net Deferred tax liability Deferred tax liability, financial reporting basis Deferred tax liability, tax basis Number of option purchase during period Number of option purchase during period for vested Stock-based compensation expense Senior notes outstanding Contingent payment of principal and related accrued interest description Weighted-average number of common shares-basic and diluted Basic and diluted net loss per share Antidilutive securities excluded from computation of earnings per share Operating leases incremental borrowing rate Lease costs Weighted average remaining lease term (years) for our facility and equipment leases Weighted average discount rate for our facility and equipment leases 2019 2020 2021 2022 Total lease payments Less: Interest Present value of lease liabilities Less: current maturities Non-current lease liability Title of Individual [Axis] Amount due from related parties Purchase obligations Accredited Investors [Member] Accrued Interest [Member] Agreement [Member] Base Rent [Member] Boustead Securities Ltd [Member] Business combination of tax basis. CRO [Member]. Canadian Individuals [Member] Catagory 4 [Member] Catagory 1 [Member] Catagory 7 [Member] Catagory 3 [Member] Catagory 2 [Member] Chairman of the Board of Directors [Member] Clinical trial funding commitment from investor capital. CoNCERT Pharmaceuticals, Inc [Member] Commercial Bank One [Member] Commercial Bank Two [Member] Common Area Maintenance and Real Estate Tax Reimbursements [Member] Corlyst [Member] Equipment Lease [Member] Federal [Member] Funds [Member] Heatwurx, Inc [Member] Heatwurx Shareholders [Member] Lcense rights to PCS-499 [Member] Non Qualified Stock Options [Member]. Office Lease [Member] Office [Member] Option and License Agreement [Member] Payment of additional paid-in capital for consideration. Pledge Agreement with PoC [Member] PoC Capital, LLC [Member] Post-Money Valuation [Member] 2018 Private Placement Transactions [Member] Promet/Heatwurx [Member] Promet [Member] Promet Therapeutics LLC [Member] Real Estate Tax Reimbursements [Member] Recognization of deferred tax liability. Recognize exclusive license intangible asset aquired. Senior Convertible Notes [Member] Senior Convertible Notes, Net [Member] State [Member] Stock Purchase Warrants [Member] Sub-licensee [Member] Subscription Receivable [Member] Tax Cuts and Jobs Act [Member] Unamortized Debt Issuance Cost [Member] Vested Option One [Member]. Vested Option Two [Member]. Payments made directly by investor for clinical trial costs. Payments made directly by an investor in partial satisfaction of their stock subscription receivable. Increase decrease in current portion of operating lease liability. Reduction in deferred lease liability. Operating lease liability. Non-cash investing and financing activities, net. Business Activities and Organization [Policy Text Block] Disclosure of accounting policy for reporting when there is a substantial doubt about an entity's ability to continue as a going concern for a reasonable period of time (generally a year from the balance sheet date). Disclose: (a) pertinent conditions and events giving rise to the assessment of substantial doubt about the entity's ability to continue as a going concern for a reasonable period of time, (b) the possible effects of such conditions and events, (c) management's evaluation of the significance of those conditions and events and any mitigating factors, (d) possible discontinuance of operations, (e) management's plans (including relevant prospective financial information), and (f) information about the recoverability or classification of recorded asset amounts or the amounts or classification of liabilities. If management's plans alleviate the substantial doubt about the entity's ability to continue as a going concern, disclosure of the principal conditions and events that initially raised the substa Schedule of weighted average remaining lease terms and discount rate for our operating leases [Table Text Block] Contract Research Organization [Member] Canadian Holders [Member] Operating lease interest. Operating leases incremental borrowing rate . Amortization of right-of-use assets. Assets, Current Assets Liabilities, Current Liabilities Common Stock, Value, Subscriptions Stockholders' Equity Attributable to Parent Liabilities and Equity Operating Income (Loss) Interest Expense Income Tax Expense (Benefit) Shares, Outstanding Share-based Payment Arrangement, Noncash Expense Increase (Decrease) in Prepaid Expense Increase (Decrease) in Interest Payable, Net Increase (Decrease) in Accounts Payable Increase (Decrease) in Accrued Liabilities Payments to Acquire Intangible Assets Net Cash Provided by (Used in) Investing Activities Cash and Cash Equivalents, Period Increase (Decrease) Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Commitments and Contingencies Disclosure [Text Block] Goodwill and Intangible Assets, Policy [Policy Text Block] Share-based Payment Arrangement [Policy Text Block] Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Net Lessee, Operating Lease, Liability, Payments, Due