Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 32,369,973	$ 21,606,820
Prepaid expenses and other current assets	698,864	914,275
Total current assets	33,068,837	22,521,095
Property and equipment, net	90,183	88,362
Restricted cash	40,986	40,717
Total assets	33,200,006	22,650,174
Current liabilities:
Accounts payable	1,318,385	1,670,369
Accrued expenses	1,498,286	2,186,262
Deferred grant revenue	148,405	528,974
Total current liabilities	2,965,076	4,385,605
Commitments and contingencies (Note 7)
Stockholders' equity:
Common stock, $0.001 par value, 400,000,000 shares authorized, 5,430,215 and 3,736,673 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	5,430	3,736
Additional paid-in capital	350,438,045	335,644,204
Accumulated other comprehensive loss	(10,626,356)	(10,611,273)
Accumulated deficit	(310,893,252)	(308,083,161)
Total stockholders' equity	28,923,867	16,953,506
Total liabilities and stockholders' equity	33,200,006	22,650,174
Series A Convertible Preferred Stock
Convertible preferred stock:
Series A convertible preferred stock, $0.001 par value, 40,000,000 shares authorized; 56,227 shares issued and outstanding at March 31, 2024 and December 31, 2023	$ 1,311,063	$ 1,311,063