Note 9 - Stock Compensation Plans - Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Exercised (in shares)		(100,000)	0
Stock Options [Member]
Outstanding (in shares)	[1]	226,896
Outstanding, weighted average exercise price (in dollars per share)		$ 6.58
Granted (in shares)		25,000
Granted, weighted average exercise price (in dollars per share)		$ 6.07
Exercised (in shares)		(28,796)
Exercised, weighted average exercise price (in dollars per share)		$ 3.04
Canceled/Expired (in shares)		(28,796)
Canceled/Expired, weighted average exercise price (in dollars per share)		$ 5.12
Outstanding (in shares)		194,304	226,896	[1]
Outstanding, weighted average exercise price (in dollars per share)		$ 6.51	$ 6.58
Outstanding, weighted average remaining life (Year)		7 years 10 months 17 days
Outstanding, aggregate intrinsic value		$ 14,266
Vested (in shares)		194,304
Vested, weighted average exercise price (in dollars per share)		$ 6.51
Vested, weighted average remaining life (Year)		7 years 10 months 17 days
Vested, aggregate intrinsic value		$ 14,266
Exercisable (in shares)		194,304
Exercisable, weighted average exercise price (in dollars per share)		$ 6.51
Exercisable, weighted average remaining life (Year)		7 years 10 months 17 days
Exercisable, aggregate intrinsic value		$ 14,266

[1] Balances as of January 1, 2023 differ from those as of December 31, 2022 presented in the Company's 2022 Form 10-K due to the special dividend paid during 2023. In connection with the dividend, the number of options and the weighted average exercise price were adjusted pursuant to the terms of the Company's 2010 Plan.