Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net loss	$ (4,349,021)	$ (2,362,478)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization and depreciation	8,232	8,899
Non-cash lease expense	30,925	27,995
Share-based compensation	78,271	94,805
Issuance of common stock to vendors	50,001
Amortization of deferred issuance costs associated with convertible debt	10,242	10,155
Change in operating assets and liabilities:
Contracts and grants receivable	15,197	42,050
Prepaid expenses and other current assets	(70,732)	(245,384)
Research and development incentives receivable	55,466	327,293
Operating lease liability	(30,921)	(27,996)
Accounts payable and accrued expenses	1,228,383	(1,032,095)
Accrued compensation	(264,886)	(828,471)
Net cash used in operating activities	(3,238,843)	(3,985,227)
Investing activities:
Purchases of office furniture and equipment	(9,823)
Net cash used in investing activities	(9,823)
Financing activities:
Proceeds from issuance of common stock pursuant to B. Riley At Market Issuance Sales Agreement		16,395,606
Costs associated with B. Riley At Market Issuance Sales Agreement		(492,445)
Proceeds from the exercise of warrants		51
Costs associated with issuance of convertible debt		(45,512)
Principal repayment - financing lease		(1,999)
Net cash provided by financing activities		15,855,701
Effect of exchange rate on cash and cash equivalents	80,448	(5,193)
Net (decrease)/increase in cash and cash equivalents	(3,168,218)	11,865,281
Cash and cash equivalents at beginning of period	26,043,897	18,676,663
Cash and cash equivalents at end of period	22,875,679	30,541,944
Supplemental information:
Cash paid for state income taxes		2,132
Cash paid for interest	223,901	221,178
Cash paid for lease liabilities:
Operating lease	$ 33,325	33,325
Financing lease		2,136
Non-cash activities:
Deferred issuance cost reclassified to additional-paid-in capital		$ 47,452