Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net loss	$ (7,847,097)	$ (12,148,257)
Adjustments to reconcile net loss to cash used in operating activities:
Amortization and depreciation	26,614	52,635
Non-cash lease expense	86,124	100,720
Share-based compensation	255,147	211,266
Issuance of common stock for milestone		5,000,000
Issuance of common stock to vendor	27,500	59,000
Amortization of deferred issuance costs associated with convertible debt	31,456
Gain on forgiveness of PPP loan	(421,584)
Change in operating assets and liabilities:
Contracts and grants receivable	159,590	624,433
Prepaid expenses and other current assets	(203,619)	(70,500)
Research and development incentives receivable	258,509	(5,164)
Operating lease liability	(86,124)	(101,779)
Accounts payable and accrued expenses	(154,415)	(827,680)
Accrued compensation	(816,367)	(224,145)
Net cash used in operating activities	(8,684,266)	(7,329,471)
Investing activities:
Purchases of office furniture and equipment		(7,147)
Net cash used in investing activities		(7,147)
Financing activities:
Proceeds from issuance of common stock pursuant to B. Riley At Market Issuance Sales Agreement	19,417,290	12,691,268
Costs associated with B. Riley At Market Issuance Sales Agreement	(584,334)	(551,755)
Proceeds from the exercise of warrants	51	685,384
Proceeds from the exercises of stock options	25,835	4,987
Costs associated with issuance of convertible debt	(45,512)
Proceeds from paycheck protection program		417,830
Principal repayment - financing lease	(6,149)	(5,566)
Net cash provided by financing activities	18,807,181	13,242,148
Effect of exchange rate on cash and cash equivalents	67,909	16,556
Net increase in cash and cash equivalents	10,190,824	5,922,086
Cash and cash equivalents at beginning of period	18,676,663	5,420,708
Cash and cash equivalents at end of period	28,867,487	11,342,794
Supplemental information:
Cash paid for state income taxes	7,382	4,021
Cash paid for interest	444,814
Cash paid for lease liabilities:
Operating lease	99,975	106,950
Financing lease	6,408	6,408
Non-cash activities:
Right-of-use assets and lease liabilities recorded		240,727
Deferred issuance cost in accounts payable	22,700	57,884
Deferred issuance cost reclassified to additional-paid-in capital	$ 55,572	$ 124,981