Note 11 - Share-based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 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 20 days	8 years 9 months
Outstanding, aggregate intrinsic value	$ 180	$ 3,979
Options on Common Shares, Granted (in shares)	1,495,000
Granted, weighted average exercise price (in dollars per share)	$ 2.24
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)	(1,928,925)
Forfeited, cancelled, expired, weighted average exercise price (in dollars per share)	$ 3
Options on Common Shares, Outstanding (in shares)	3,991,629
Outstanding, weighted average exercise price (in dollars per share)	$ 2.18
Exercisable, shares (in shares)	1,200,536
Exercisable, weighted average exercise price (in dollars per share)	$ 3.33
Exercisable, weighted average contractual term (Year)	6 years 11 months 15 days
Exercisable, aggregate intrinsic value	$ 40