Annual report pursuant to Section 13 and 15(d)

11. INCOME TAXES (Details 1)

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11. INCOME TAXES (Details 1) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Federal and state net operating loss carryforwards $ 42,496,374 $ 26,080,351
Federal and state research credits 630,516 525,248
Interest expense limitations carryforwards 0 1,159,422
Transaction costs 1,174,733 1,147,581
Deferred revenue 603,535 624,610
Accrued expenses and other 2,433,142 6,011,057
Total gross deferred tax assets 47,338,300 35,548,269
Less: valuation allowance for deferred tax assets 47,338,300 (35,548,269)
Net deferred tax assets $ 0 $ 0