Note N - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Net earnings	$ 7,690	$ 11,184
Less: Allocation to unvested restricted stock units	90	196
Net earnings attributable to common shareholders	$ 7,600	$ 10,988
Weighted average common shares outstanding (in shares)	7,288,906	7,071,066