Note 8 - Earnings Per Share - Net Income Per Share Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Net income	$ 5,787	$ 6,359
Allocation of distributed and undistributed income to unvested restricted stock shareholders	0	(1)
Net income attributable to common shareholders	$ 5,787	$ 6,358
Weighted average shares of common stock outstanding – basic (in shares)	22,972	23,868
Net income per share – basic (in dollars per share)	$ 0.25	$ 0.27
Net income attributable to common shareholders for basic computation	$ 5,787	$ 6,358
Weighted average effect of dilutive securities – stock options (in shares)	2	95
Denominator for diluted earnings per share – adjusted weighted average shares (in shares)	22,974	23,963
Net income per share – diluted (in dollars per share)	$ 0.25	$ 0.27