Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock [Member]	Treasury stock [Member]	Capital in excess of Stated value [Member]	Retained earnings [Member]	Accumulated other comprehensive income (loss) [Member]
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			$ 15	(15)
Shares issued upon exercise of SSARs ( in shares)			50
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)
Beginning balance at Mar. 31, 2024	236,477	$ 10,003	$ (1,791)	94,680	137,755	(4,170)
Beginning balance (in shares) at Mar. 31, 2024		33,342	(5,965)
Share-based compensation	4,850			4,850
Restricted shares issued, net			$ 3	(3)
Restricted shares issued, net (in shares)			11
Shares issued upon exercise of SSARs			$ 150	(150)
Shares issued upon exercise of SSARs ( in shares)			498
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(1,104)		$ (4)	(1,100)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(14)
Net income	14,106				14,106
Series A convertible preferred stock dividends	0
Unrealized translation adjustments	(158)					(158)
Ending balance at Jun. 30, 2024	$ 254,171	$ 10,003	$ (1,642)	$ 98,277	$ 151,861	$ (4,328)
Ending balance (in shares) at Jun. 30, 2024		33,342	(5,470)