Note 13 - Share-based Compensation - Stock Option Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Outstanding, options (in shares)	779,938
Outstanding, weighted average exercise price (in dollars per share)	$ 16.12
Outstanding, weighted average remaining life (Year)	3 years 3 months 3 days	3 years 3 months 7 days
Outstanding, aggregate intrinsic value	$ 301	$ 5,097
Granted (in shares)	324,091
Granted, weighted average exercise price (in dollars per share)	$ 14.41
Exercised (in shares)	(85,840)
Exercised, weighted average exercise price (in dollars per share)	$ 10.17
Lapsed or cancelled (in shares)	(55,414)
Lapsed or cancelled, weighted average exercise price (in dollars per share)	$ 19.34
Outstanding, options (in shares)	962,775	779,938
Outstanding, weighted average exercise price (in dollars per share)	$ 15.89	$ 16.12
Exercisable, options (in shares)	512,161
Exercisable, weighted average exercise price, options (in dollars per share)	$ 14.48
Exercisable, weighted average remaining life (Year)	2 years 2 months 8 days
Exercisable, aggregate intrinsic value, options	$ 282