Consolidated Balance Sheets - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 4,771,758	$ 3,148,496
Marketable investment securities	17,263,788	29,381,410
Accrued interest income	52,254	80,427
Contract asset - current portion		579,428
Prepaid and other current assets	773,424	945,319
Total current assets	22,861,224	34,135,080
Contract asset - non-current portion		3,252,500
Property and equipment, net of accumulated depreciation of $1,182,191 and $1,153,530 respectively	116,095	131,589
Other assets	23,753	23,753
Total assets	23,001,072	37,542,922
Current liabilities:
Accounts payable	1,395,977	600,388
Accrued expenses	1,218,486	1,077,738
Warrant liability - current portion	17,166
Total current liabilities	2,631,629	1,678,126
Warrant liability		229,856
Total liabilities	2,631,629	1,907,982
Commitments and contingencies (notes 8, 9 and 11)
Stockholders’ equity:
Common stock, par value $0.0001 per share, 200,000,000 shares authorized; 5,316,166 and 5,235,166 issued and 5,315,830 and 5,234,830 outstanding	8,860	8,852
Additional paid-in capital	220,171,250	219,112,164
Treasury stock at cost, 336 shares	(40,712)	(40,712)
Accumulated other comprehensive gain (loss)	7,259	(20,321)
Accumulated deficit	(199,777,214)	(183,425,043)
Total stockholders’ equity	20,369,443	35,634,940
Total liabilities and stockholders’ equity	$ 23,001,072	$ 37,542,922