Note 3 - Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($)	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Net income	$ 2,150,362	$ (534,336)	$ (882,623)	$ (1,959,837)	$ 190,525	$ (4,275,647)
Change in fair value of convertible notes	4,778,251		(0)		5,424,251	(0)
Adjusted net income (loss)	$ (2,627,889)		$ (882,623)		$ (5,233,726)	$ (4,275,647)
Weighted average shares outstanding, basic (in shares)	3,308,302		518,140		1,458,415	518,140
Weighted average dilutive stock options (in shares)	458,398		0		750,992	0
Weighted average shares outstanding, diluted (in shares)	3,766,700		518,140		2,209,407	518,140
Net income (loss), basic (in dollars per share)	$ 0.65	$ (0.12)	$ (1.70)	$ (0.44)	$ 0.13	$ (8.25)
Net income (loss), dilutive (in dollars per share)	$ (0.70)		$ (1.70)		$ (2.37)	$ (8.25)