Note 12 - Share-based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Options on Common Shares, Outstanding (in shares)	5,491,399
Outstanding, weighted average exercise price (in dollars per share)	$ 3.72
Outstanding, remaining contractual term (Year)	8 years 9 months	5 years 11 months 15 days
Outstanding, aggregate intrinsic value	$ 3,979	$ 92
Options on Common Shares, Granted (in shares)	2,592,309
Granted, weighted average exercise price (in dollars per share)	$ 1.68
Options on Common Shares, Exercised (in shares)	(123,056)
Exercised, weighted average exercise price (in dollars per share)	$ 1.69
Options on Common Shares, Forfeited, cancelled, expired (in shares)	(3,303,017)
Forfeited, cancelled, expired, weighted average exercise price (in dollars per share)	$ 3.8
Options on Common Shares, Outstanding (in shares)	4,657,635	5,491,399
Outstanding, weighted average exercise price (in dollars per share)	$ 2.52	$ 3.72
Exercisable, shares (in shares)	1,160,580
Exercisable, weighted average exercise price (in dollars per share)	$ 4.02
Exercisable, weighted average contractual term (Year)	7 years 10 months 9 days
Exercisable, aggregate intrinsic value	$ 274