Note 13 - Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2025	Dec. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Balance	$ 142,214	$ 139,273	$ 137,280	$ 127,329	$ 128,764	$ 129,687	$ 142,214	$ 127,329	$ 132,425	$ 127,475
Net earnings	3,043	2,240	5,028	(1,152)	(675)	2,567	10,311	740
Paid in capital – restricted stock units	182	36	123	32	42	47
Issuance of restricted stock	0		0
Repurchase of shares			(10)	(37)	(11)	(123)
Cash dividends	(284)	(283)	(286)	(278)	(279)	(279)
BALANCE	142,214	139,273	137,280	127,329	128,764	129,687	142,214	127,329
Common Stock [Member]
Balance	9,020	8,967	8,967	8,873	8,873	8,873	9,020	8,873	8,877	8,873
Net earnings	0	0	0	0	0	0
Paid in capital – restricted stock units	0	0	0	0	0	0
Issuance of restricted stock	53		90
Repurchase of shares			0	0	0	0
Cash dividends	0	0	0	0	0	0
BALANCE	9,020	8,967	8,967	8,873	8,873	8,873	9,020	8,873
Additional Paid-in Capital [Member]
Balance	35,592	35,463	35,427	35,368	35,336	35,294	35,592	35,368	35,394	35,247
Net earnings	0	0	0	0	0	0
Paid in capital – restricted stock units	182	36	123	32	42	47
Issuance of restricted stock	(53)		(90)
Repurchase of shares			0	0	0	0
Cash dividends	0	0	0	0	0	0
BALANCE	35,592	35,463	35,427	35,368	35,336	35,294	35,592	35,368
Treasury Stock, Common [Member]
Balance	(13,110)	(13,110)	(13,110)	(13,100)	(13,063)	(13,052)	(13,110)	(13,100)	(13,100)	(12,929)
Net earnings	0	0	0	0	0	0
Paid in capital – restricted stock units	0	0	0	0	0	0
Issuance of restricted stock	0		0
Repurchase of shares			(10)	(37)	(11)	(123)
Cash dividends	0	0	0	0	0	0
BALANCE	(13,110)	(13,110)	(13,110)	(13,100)	(13,063)	(13,052)	(13,110)	(13,100)
Retained Earnings [Member]
Balance	110,712	107,953	105,996	96,188	97,618	98,572	110,712	96,188	$ 101,254	$ 96,284
Net earnings	3,043	2,240	5,028	(1,152)	(675)	2,567
Paid in capital – restricted stock units	0	0	0	0	0	0
Issuance of restricted stock	0		0
Repurchase of shares			0	0	0	0
Cash dividends	(284)	(283)	(286)	(278)	(279)	(279)
BALANCE	$ 110,712	$ 107,953	$ 105,996	$ 96,188	$ 97,618	$ 98,572	$ 110,712	$ 96,188