Note 8 - Stock Warrants - Summary of Warrants (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Number of shares (in shares)	1,389,584	14,202,417
Exercise price (in dollars per share)	$ 17.43
Remaining contractual life (Year)	1 year 11 months 4 days
Warrant One [Member]
Number of shares (in shares)	431,250
Exercise price (in dollars per share)	$ 10
Remaining contractual life (Year)	1 year 29 days
Warrant Two [Member]
Number of shares (in shares)	958,334
Exercise price (in dollars per share)	$ 20
Remaining contractual life (Year)	2 years 4 months 6 days