Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common stock [Member]	TreasuryStockMember	Capital in excess of stated value [Member]	Retained Earnings [Member]	Accumulated other comprehensive income (loss) [Member]
Beginning balance at Mar. 31, 2022	$ 97,344	$ 9,482	$ (2,063)	$ 49,963	$ 40,018	$ (56)
Beginning balance (in shares) at Mar. 31, 2022		31,607	(6,879)
Share-based compensation	2,623			2,623
Restricted shares issued, net			$ 75	(75)
Restricted shares issued, net (in shares)			250
Shares issued upon exercise of SSARs ( in shares)			69
Shares issued upon exercise of SSARs			$ 21	(21)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(873)		$ (7)	(866)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(22)
Net income	3,039				3,039
Series A convertible preferred stock dividends	(459)				(459)
Unrealized translation adjustments	(398)					(398)
Ending balance at Jun. 30, 2022	101,276	$ 9,482	$ (1,974)	51,624	42,598	(454)
Ending balance (in shares) at Jun. 30, 2022		31,607	(6,582)
Beginning balance at Mar. 31, 2023	109,310	$ 9,482	$ (1,884)	52,978	52,764	(4,030)
Beginning balance (in shares) at Mar. 31, 2023		31,607	(6,280)
Share-based compensation	3,377			3,377
Restricted shares issued, net			$ 3	(3)
Restricted shares issued, net (in shares)			12
Shares issued upon exercise of SSARs ( in shares)			50
Shares issued upon exercise of SSARs			$ 15	(15)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(2,613)		$ (11)	(2,602)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(37)
Net income	1,548				1,548
Series A convertible preferred stock dividends	(459)				(459)
Unrealized translation adjustments	523					523
Ending balance at Jun. 30, 2023	$ 111,686	$ 9,482	$ (1,877)	$ 53,735	$ 53,853	$ (3,507)
Ending balance (in shares) at Jun. 30, 2023		31,607	(6,255)