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	6,019			6,019
Restricted shares issued, net			$ 73	(73)
Restricted shares issued, net (in shares)			245
Shares issued upon exercise of SSARs			$ 37	(37)
Shares issued upon exercise of SSARs ( in shares)			123
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(1,812)		$ (12)	(1,800)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(39)
Net Income (Loss)	6,615				6,615
Series A convertible preferred stock dividends	(918)				(918)
Unrealized translation adjustments	(654)					(654)
Ending balance at Sep. 30, 2022	106,594	$ 9,482	$ (1,965)	54,072	45,715	(710)
Ending balance (in shares) at Sep. 30, 2022		31,607	(6,550)
Beginning balance at Jun. 30, 2022	101,276	$ 9,482	$ (1,974)	51,624	42,598	(454)
Beginning balance (in shares) at Jun. 30, 2022		31,607	(6,582)
Share-based compensation	3,396			3,396
Restricted shares issued, net			$ (2)	2
Restricted shares issued, net (in shares)			(5)
Shares issued upon exercise of SSARs			$ 16	(16)
Shares issued upon exercise of SSARs ( in shares)			54
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(939)		$ (5)	(934)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(17)
Net Income (Loss)	3,576				3,576
Series A convertible preferred stock dividends	(459)				(459)
Unrealized translation adjustments	(256)					(256)
Ending balance at Sep. 30, 2022	106,594	$ 9,482	$ (1,965)	54,072	45,715	(710)
Ending balance (in shares) at Sep. 30, 2022		31,607	(6,550)
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	5,911			5,911
Restricted shares issued, net			$ 1	(1)
Restricted shares issued, net (in shares)			4
Shares issued upon exercise of SSARs			$ 27	(27)
Shares issued upon exercise of SSARs ( in shares)			90
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(3,722)		$ (15)	(3,707)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(50)
Net Income (Loss)	6,093				6,093
Series A convertible preferred stock dividends	(918)				(918)
Unrealized translation adjustments	(56)					(56)
Ending balance at Sep. 30, 2023	116,618	$ 9,482	$ (1,871)	55,154	57,939	(4,086)
Ending balance (in shares) at Sep. 30, 2023		31,607	(6,236)
Beginning balance at Jun. 30, 2023	111,686	$ 9,482	$ (1,877)	53,735	53,853	(3,507)
Beginning balance (in shares) at Jun. 30, 2023		31,607	(6,255)
Share-based compensation	2,534			2,534
Restricted shares issued, net			$ (2)	2
Restricted shares issued, net (in shares)			(8)
Shares issued upon exercise of SSARs			$ 12	(12)
Shares issued upon exercise of SSARs ( in shares)			40
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(1,109)		$ (4)	(1,105)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(13)
Net Income (Loss)	4,545				4,545
Series A convertible preferred stock dividends	(459)				(459)
Unrealized translation adjustments	(579)					(579)
Ending balance at Sep. 30, 2023	$ 116,618	$ 9,482	$ (1,871)	$ 55,154	$ 57,939	$ (4,086)
Ending balance (in shares) at Sep. 30, 2023		31,607	(6,236)