Consolidated Balance Sheets - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 26,043,897	$ 18,676,663
Contracts and grants receivable	138,889	203,774
Research and development incentives receivable	103,832	361,096
Prepaid expenses and other current assets	282,903	225,473
Total current assets	26,569,521	19,467,006
Security deposit	22,777	22,777
Office furniture and equipment, net of accumulated depreciation of $167,848 and $154,769	22,220	23,510
Deferred issuance cost	20,266	53,523
Right-of-use lease assets	106,155	228,027
Research and development incentives receivable	121,238	73,142
Other assets	7,750	23,250
Total assets	26,869,927	19,891,235
Current liabilities:
Accounts payable	2,925,544	2,129,844
Accrued expenses	2,956,545	2,638,308
Accrued compensation	302,936	875,096
Paycheck protection program loan		324,979
Lease liabilities - current	106,151	112,294
Total current liabilities	6,291,176	6,080,521
Non-current liabilities:
Convertible debt, net of debt discount of $143,847 and $140,261	9,856,153	9,859,739
Paycheck Protection Program loan, net of current	0	92,851
Lease liabilities, net of current		116,296
Total liabilities	16,147,329	16,149,407
Commitments and contingencies
Shareholders' equity:
Preferred stock, 350,000 shares authorized; none issued or outstanding
Common stock, $.001 par value; 75,000,000 shares authorized; 42,873,445 shares and 30,643,656 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	42,873	30,644
Additional paid-in capital	216,402,890	196,949,655
Accumulated other comprehensive income/(loss)	41,942	(24,337)
Accumulated deficit	(205,765,107)	(193,214,134)
Total shareholders' equity	10,722,598	3,741,828
Total liabilities and shareholders' equity	$ 26,869,927	$ 19,891,235