Note 12 - Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Mar. 31, 2025	Mar. 31, 2024
Balance	$ 137,280	$ 129,687	$ 132,425	$ 127,475
Net earnings	5,028	2,567
Paid in capital – restricted stock units	123	47
Issuance of restricted stock	0
Repurchase of shares	(10)	(123)
Cash dividends	(286)	(279)
Balance	137,280	129,687
Common Stock [Member]
Balance	8,967	8,873	8,877	8,873
Net earnings	0	0
Paid in capital – restricted stock units	0	0
Issuance of restricted stock	90
Repurchase of shares	0	0
Cash dividends	0	0
Balance	8,967	8,873
Additional Paid-in Capital [Member]
Balance	35,427	35,294	35,394	35,247
Net earnings	0	0
Paid in capital – restricted stock units	123	47
Issuance of restricted stock	(90)
Repurchase of shares	0	0
Cash dividends	0	0
Balance	35,427	35,294
Treasury Stock, Common [Member]
Balance	(13,110)	(13,052)	(13,100)	(12,929)
Net earnings	0	0
Paid in capital – restricted stock units	0	0
Issuance of restricted stock	0
Repurchase of shares	(10)	(123)
Cash dividends	0	0
Balance	(13,110)	(13,052)
Retained Earnings [Member]
Balance	105,996	98,572	$ 101,254	$ 96,284
Net earnings	5,028	2,567
Paid in capital – restricted stock units	0	0
Issuance of restricted stock	0
Repurchase of shares	0	0
Cash dividends	(286)	(279)
Balance	$ 105,996	$ 98,572