Note L - Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Balance	$ 115,432	$ 79,686
Net earnings	7,690	11,184
Other comprehensive income (loss)	317	7,174
Paid in capital – restricted stock units	78	73
Cash dividends	(148)	(157)
Balance	123,369	102,715
Repurchase of shares		(29)
Plateplus Inc. [Member]
Shares issued - Plateplus business combination		4,784
Common Stock [Member]
Balance	8,869	8,345
Net earnings	0	0
Other comprehensive income (loss)	0	0
Paid in capital – restricted stock units	0	0
Cash dividends	0	0
Balance	8,869	8,861
Repurchase of shares		0
Common Stock [Member] | Plateplus Inc. [Member]
Shares issued - Plateplus business combination		516
AOCI Attributable to Parent [Member]
Balance	(317)	(10,269)
Net earnings	0	0
Other comprehensive income (loss)	317	7,174
Paid in capital – restricted stock units	0	0
Cash dividends	0	0
Balance	0	(3,095)
Repurchase of shares		0
AOCI Attributable to Parent [Member] | Plateplus Inc. [Member]
Shares issued - Plateplus business combination		0
Additional Paid-in Capital [Member]
Balance	35,005	30,442
Net earnings	0	0
Other comprehensive income (loss)	0	0
Paid in capital – restricted stock units	78	73
Cash dividends	0	0
Balance	35,083	34,783
Repurchase of shares		0
Additional Paid-in Capital [Member] | Plateplus Inc. [Member]
Shares issued - Plateplus business combination		4,268
Treasury Stock, Common [Member]
Balance	(7,778)	(7,741)
Net earnings	0	0
Other comprehensive income (loss)	0	0
Paid in capital – restricted stock units	0	0
Cash dividends	0	0
Balance	(7,778)	(7,770)
Shares issued - Plateplus business combination		0
Repurchase of shares		(29)
Retained Earnings [Member]
Balance	79,653	58,909
Net earnings	7,690	11,184
Other comprehensive income (loss)	0	0
Paid in capital – restricted stock units	0	0
Cash dividends	(148)	(157)
Balance	$ 87,195	69,936
Repurchase of shares		0
Retained Earnings [Member] | Plateplus Inc. [Member]
Shares issued - Plateplus business combination		$ 0