Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Assets [Abstract]
Cash and cash equivalents	$ 12,687,041	$ 27,612,732
Prepaid expenses	2,113,249	1,325,998
Total current assets	14,800,290	28,938,730
Property and equipment, net	212,953	234,912
Other assets	1,187,788	2,174,286
Total assets	16,201,031	31,347,928
Current liabilities:
Accounts payable	4,213,295	1,747,682
Accrued expenses	2,868,390	3,000,212
Total current liabilities	7,081,685	4,747,894
Equity [Abstract]
Authorized shares – 600,000,000 Issued and outstanding shares – 26,695,287 and 26,334,953 at September 30, 2023 and December 31, 2022, respectively	26,695	26,335
Additional paid-in capital	105,864,028	104,970,722
Accumulated deficit	(96,771,377)	(78,397,023)
Total stockholders’ equity	9,119,346	26,600,034
Total liabilities and stockholders’ equity	$ 16,201,031	$ 31,347,928