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, 2021	$ 79,876	$ 9,482	$ (2,278)	$ 37,257	$ 35,376	$ 39
Beginning balance (in shares) at Mar. 31, 2021		31,607	(7,596)
Share-based compensation	10,847			10,847
Restricted shares issued, net			$ 31	(31)
Restricted shares issued, net (in shares)			103
Shares issued upon exercise of SSARs			$ 187	(187)
Shares issued upon exercise of SSARs (in shares)			626
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(1,458)		$ (8)	(1,450)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(28)
Net income	4,496				4,496
Series A convertible preferred stock dividends	(1,377)				(1,377)
Unrealized translation adjustments	29					29
Ending balance at Dec. 31, 2021	92,413	$ 9,482	$ (2,068)	46,436	38,495	68
Ending balance (in shares) at Dec. 31, 2021		31,607	(6,895)
Beginning balance at Sep. 30, 2021	87,718	$ 9,482	$ (2,100)	42,867	37,412	57
Beginning balance (in shares) at Sep. 30, 2021		31,607	(7,000)
Share-based compensation	3,794			3,794
Restricted shares issued, net			$ 28	(28)
Restricted shares issued, net (in shares)			(92)
Shares issued upon exercise of SSARs			$ 5	(5)
Shares issued upon exercise of SSARs (in shares)			17
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(193)		$ (1)	(192)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(4)
Net income	1,542				1,542
Series A convertible preferred stock dividends	(459)				(459)
Unrealized translation adjustments	11					11
Ending balance at Dec. 31, 2021	92,413	$ 9,482	$ (2,068)	46,436	38,495	68
Ending balance (in shares) at Dec. 31, 2021		31,607	(6,895)
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	9,342			9,342
Restricted shares issued, net			$ 99	(99)
Restricted shares issued, net (in shares)			331
Shares issued upon exercise of SSARs			$ 55	(55)
Shares issued upon exercise of SSARs (in shares)			181
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(3,002)		$ (17)	(2,985)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(55)
Net income	10,507				10,507
Series A convertible preferred stock dividends	(1,377)				(1,377)
Unrealized translation adjustments	(902)					(902)
Ending balance at Dec. 31, 2022	111,912	$ 9,482	$ (1,926)	56,166	49,148	(958)
Ending balance (in shares) at Dec. 31, 2022		31,607	(6,422)
Beginning balance at Sep. 30, 2022	106,594	$ 9,482	$ (1,965)	54,072	45,715	(710)
Beginning balance (in shares) at Sep. 30, 2022		31,607	(6,550)
Share-based compensation	3,323			3,323
Restricted shares issued, net			$ 26	(26)
Restricted shares issued, net (in shares)			86
Shares issued upon exercise of SSARs			$ 18	(18)
Shares issued upon exercise of SSARs (in shares)			58
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares	(1,190)		$ (5)	(1,185)
Shares withheld for taxes upon exercise of SSARs or vesting of restricted shares (in shares)			(16)
Net income	3,892				3,892
Series A convertible preferred stock dividends	(459)				(459)
Unrealized translation adjustments	(248)					(248)
Ending balance at Dec. 31, 2022	$ 111,912	$ 9,482	$ (1,926)	$ 56,166	$ 49,148	$ (958)
Ending balance (in shares) at Dec. 31, 2022		31,607	(6,422)