Note 13 - Share-based Compensation - Stock-settled Stock Appreciation Rights Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Lapsed or cancelled (in shares)	(180,962)
Lapsed or cancelled, weighted average exercise price (in dollars per share)	$ 17.99
Stock Appreciation Rights (SARs) [Member]
Outstanding SARS (in shares)	320,385
Outstanding (in dollars per share)	$ 15.23
Outstanding SARS, weighted average remaining life (Year)	2 years 25 days	2 years 2 months 23 days
Outstanding SARS, aggregate intrinsic value	$ 506	$ 69
Granted SARs (in shares)	51,209
Granted SARS, weighted average exercise price (in dollars per share)	$ 12.04
Exercised SARs (in shares)	(41,226)
Exercised SARS, weighted average exercise price (in dollars per share)	$ 9.83
Lapsed or cancelled (in shares)	(37,860)
Lapsed or cancelled, weighted average exercise price (in dollars per share)	$ 23.62
Outstanding SARS (in shares)	292,508	320,385
Outstanding SARS, weighted average exercise price (in dollars per share)	$ 14.35	$ 15.23
Exercisable (in shares)	184,245
Exercisable, weighted average exercise price (in dollars per share)	$ 14.29
Exercisable SARS, weighted average remaining life (Year)	1 year 1 month 6 days
Exercisable, aggregate intrinsic value	$ 361