Note K - Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Balance	$ 127,475	$ 115,432
Net earnings	2,567	7,690
Paid in capital – restricted stock units	47	78
Repurchase of shares	(123)
Cash dividends	(279)	(148)
Other comprehensive income		317
Balance	129,687	123,369
Common Stock [Member]
Balance	8,873	8,869
Net earnings	0	0
Paid in capital – restricted stock units	0	0
Repurchase of shares	0
Cash dividends	0	0
Other comprehensive income		0
Balance	8,873	8,869
AOCI Attributable to Parent [Member]
Balance	0	(317)
Net earnings	0	0
Paid in capital – restricted stock units	0	0
Repurchase of shares	0
Cash dividends	0	0
Other comprehensive income		317
Balance	0	0
Additional Paid-in Capital [Member]
Balance	35,247	35,005
Net earnings	0	0
Paid in capital – restricted stock units	47	78
Repurchase of shares	0
Cash dividends	0	0
Other comprehensive income		0
Balance	35,294	35,083
Treasury Stock, Common [Member]
Balance	(12,929)	(7,778)
Net earnings	0	0
Paid in capital – restricted stock units	0	0
Repurchase of shares	(123)
Cash dividends	0	0
Other comprehensive income		0
Balance	(13,052)	(7,778)
Retained Earnings [Member]
Balance	96,284	79,653
Net earnings	2,567	7,690
Paid in capital – restricted stock units	0	0
Repurchase of shares	0
Cash dividends	(279)	(148)
Other comprehensive income		0
Balance	$ 98,572	$ 87,195