Note 11 - Share-based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Options on Common Shares, Outstanding (in shares)	4,657,635
Outstanding, weighted average exercise price (in dollars per share)	$ 2.52
Outstanding, remaining contractual term (Year)	8 years 7 months 17 days	8 years 9 months
Outstanding, aggregate intrinsic value	$ 1,631	$ 3,979
Options on Common Shares, Granted (in shares)	535,000
Granted, weighted average exercise price (in dollars per share)	$ 3.48
Options on Common Shares, Exercised (in shares)	(232,081)
Exercised, weighted average exercise price (in dollars per share)	$ 2.53
Options on Common Shares, Forfeited, cancelled, expired (in shares)	(132,573)
Forfeited, cancelled, expired, weighted average exercise price (in dollars per share)	$ 2.14
Options on Common Shares, Outstanding (in shares)	4,827,981	4,657,635
Outstanding, weighted average exercise price (in dollars per share)	$ 2.64	$ 2.52
Exercisable, shares (in shares)	938,138
Exercisable, weighted average exercise price (in dollars per share)	$ 4.41
Exercisable, weighted average contractual term (Year)	6 years 2 months 8 days
Exercisable, aggregate intrinsic value	$ 0