Consolidated Statements of Shareholders' Equity - 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, 2020	$ 71,757	$ 9,482	$ (2,401)	$ 5,491	$ 58,984	$ 201
Beginning balance (in shares) at Mar. 31, 2020		31,607	(7,997)
Share-based compensation	40,066			40,066
Restricted shares issued, net			$ 28	(28)
Restricted shares issued, net (in shares)			90
Shares Issued Upon Exercise of SSARs			$ 141	(141)
Shares issued upon exercise of SSARs, Shares			467
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(8,177)		$ (46)	(8,131)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(156)
Net income (loss)	(21,001)				(21,001)
Series A convertible preferred stock issuance costs	(1,031)				(1,031)
Series A convertible preferred stock dividends	(1,576)				(1,576)
Unrealized translation adjustments	(162)					(162)
Ending balance at Mar. 31, 2021	79,876	$ 9,482	$ (2,278)	37,257	35,376	39
Ending balance (in shares) at Mar. 31, 2021		31,607	(7,596)
Share-based compensation	14,549			14,549
Restricted shares issued, net			$ 34	(34)
Restricted shares issued, net (in shares)			113
Shares Issued Upon Exercise of SSARs			$ 190	(190)
Shares issued upon exercise of SSARs, Shares			636
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(1,628)		$ (9)	(1,619)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(32)
Net income (loss)	6,478				6,478
Series A convertible preferred stock dividends	(1,836)				(1,836)
Unrealized translation adjustments	(95)					(95)
Ending balance at Mar. 31, 2022	97,344	$ 9,482	$ (2,063)	49,963	40,018	(56)
Ending balance (in shares) at Mar. 31, 2022		31,607	(6,879)
Share-based compensation	12,778			12,778
Restricted shares issued, net			$ 99	(99)
Restricted shares issued, net (in shares)			331
Shares Issued Upon Exercise of SSARs			$ 121	(121)
Shares issued upon exercise of SSARs, Shares			403
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(9,584)		$ (41)	(9,543)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(135)
Net income (loss)	14,582				14,582
Series A convertible preferred stock dividends	(1,836)				(1,836)
Unrealized translation adjustments	(3,974)					(3,974)
Ending balance at Mar. 31, 2023	$ 109,310	$ 9,482	$ (1,884)	$ 52,978	$ 52,764	$ (4,030)
Ending balance (in shares) at Mar. 31, 2023		31,607	(6,280)