Note M - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Net earnings	$ 2,567	$ 7,690
Less: Allocation to unvested restricted stock units	11	90
Net earnings attributable to common shareholders	$ 2,556	$ 7,600
Weighted average common shares outstanding (in shares)	6,939,208	7,288,906