Note 1 - Summary of Significant Accounting Policies - Net Income Per Share Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Net income	$ 11,600	$ 24,783	$ 30,971
Allocation of distributed and undistributed income to unvested restricted stock shareholders	(308)	(2)	(8)
Net income attributable to common shareholders	$ 11,292	$ 24,781	$ 30,963
Weighted average common shares outstanding – basic (in shares)	22,383	23,703	24,540
Net income per share – basic (in dollars per share)	$ 50	$ 1.05	$ 1.26
Weighted average effect of dilutive securities – stock options (in shares)	13	40	133
Denominator for diluted earnings per share – adjusted weighted average shares (in shares)	22,396	23,743	24,673
Net income per share – diluted (in dollars per share)	$ 50	$ 1.04	$ 1.25