Note 7 - Stockholders' Equity- Stock Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Warrants, outstanding (in shares)	524,601
Outstanding, weighted average exercise price (in dollars per share)	$ 32.42
Outstanding, December 31, 2023	$ 0	$ 0
Warrants, Granted (in shares)	441,076
Warrants granted, weighted average exercise price (in dollars per share)	$ 22.55
Warrants, Exercised (in shares)	(220,538)
Exercised, weighted average exercise price (in dollars per share)	$ 22.55
Warrants, outstanding (in shares)	745,139	524,601
Outstanding, weighted average exercise price (in dollars per share)	$ 29.5	$ 32.42