Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 28,694,694	$ 21,606,820
Prepaid expenses and other current assets	865,092	914,275
Total current assets	29,559,786	22,521,095
Property and equipment, net	92,379	88,362
Restricted cash	41,260	40,717
Other noncurrent assets	271,162
Total assets	29,964,587	22,650,174
Current liabilities:
Accounts payable	964,327	1,670,369
Accrued expenses	2,079,163	2,186,262
Deferred grant revenue	50,739	528,974
Total current liabilities	3,094,229	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 June 30, 2024 and December 31, 2023, respectively	5,430	3,736
Additional paid-in capital	350,545,473	335,644,204
Accumulated other comprehensive loss	(10,628,304)	(10,611,273)
Accumulated deficit	(314,363,304)	(308,083,161)
Total stockholders' equity	25,559,295	16,953,506
Total liabilities and stockholders' equity	29,964,587	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 June 30, 2024 and December 31, 2023	$ 1,311,063	$ 1,311,063