Note N - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net earnings	$ (675)	$ 2,567	$ 3,513	$ 7,690	$ 1,892	$ 11,203
Less: Allocation to unvested restricted stock units	1		41		8	131
Net earnings (loss) attributable to common shareholders	$ (676)		$ 3,472		$ 1,884	$ 11,072
Weighted average common shares outstanding (in shares)	6,939,416		7,288,906		6,939,312	7,288,906