Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 10,424,675	$ 4,093,579
Prepaid expenses and other current assets	1,418,745	64,127
Total current assets	11,843,420	4,157,706
Other assets	194,443	0
Total assets	12,037,863	4,157,706
Liabilities, Current [Abstract]
Accounts payable	533,790	97,302
Deferred grant revenue	547,051	0
Accrued expenses and other current liabilities	1,382,822	644,252
Convertible Notes	0	12,414,000
Total liabilities	2,463,663	13,155,554
Commitments and Contingencies
Convertible preferred stock:
Convertible preferred stock	0	24,287,211
Equity, Attributable to Parent [Abstract]
Common stock, $0.001 par value: 1,000,000,000 shares authorized, 5,674,354 and 518,140 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively	5,674	518
Additional paid-in capital	61,646,917	18,983,339
Accumulated deficit	(52,078,391)	(52,268,916)
Total stockholders' equity (deficit)	9,574,200	(33,285,059)
Total liabilities, convertible preferred stock and stockholders' equity (deficit)	12,037,863	4,157,706
Series Preferred Stock [Member]
Convertible preferred stock:
Convertible preferred stock	0	0
Series A-1 Preferred Stock [Member]
Convertible preferred stock:
Convertible preferred stock	0	246,849
Series A-2 Preferred Stock [Member]
Convertible preferred stock:
Convertible preferred stock	0	4,173,267
Series B Preferred Stock [Member]
Convertible preferred stock:
Convertible preferred stock	$ 0	$ 19,867,095