Note 13 - Share-based Compensation - Stock Option Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Outstanding, options (in shares)	962,775
Outstanding, weighted average exercise price (in dollars per share)	$ 15.89
Outstanding, weighted average remaining life (Year)	2 years 9 months 18 days	3 years 3 months 3 days
Outstanding, aggregate intrinsic value	$ 1,718	$ 301
Granted (in shares)	200,091
Granted, weighted average exercise price (in dollars per share)	$ 11.37
Exercised (in shares)	(28,728)
Exercised, weighted average exercise price (in dollars per share)	$ 9.55
Lapsed or cancelled (in shares)	(180,962)
Lapsed or cancelled, weighted average exercise price (in dollars per share)	$ 17.99
Outstanding, options (in shares)	953,176	962,775
Outstanding, weighted average exercise price (in dollars per share)	$ 14.73	$ 15.89
Exercisable, options (in shares)	501,610
Exercisable, weighted average exercise price, options (in dollars per share)	$ 16.18
Exercisable, weighted average remaining life (Year)	1 year 7 months 17 days
Exercisable, aggregate intrinsic value, options	$ 813