Consolidated Statements of Stockholders' Equity - (Unaudited) - USD ($)	Total	Common Stock [Member]	Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]
Beginning balance at Mar. 31, 2023	$ 202,176,000	$ 3,000	$ 218,700,000	$ (748,195,000)	$ 731,668,000
Beginning balance, shares at Mar. 31, 2023		54,987,366		(37,817,866)
Stock issued under stock option plan, net of shares repurchased	1,474,000	$ 0	1,474,000	$ 0	0
Stock issued under stock option plan, net of shares repurchased, shares		32,407		0
Stock-based compensation expense	1,312,000	$ 0	1,312,000	$ 0	0
Purchase of treasury stock	(17,787,000)		0	$ (17,787,000)	0
Purchase of treasury stock, shares		0		(87,992)
Net Income (Loss)	19,805,000	$ 0	0	$ 0	19,805,000
Ending balance at Jun. 30, 2023	206,980,000	$ 3,000	221,486,000	$ (765,982,000)	751,473,000
Ending balance, shares at Jun. 30, 2023		55,019,773		(37,905,858)
Beginning balance at Mar. 31, 2024	247,647,000	$ 3,000	233,629,000	$ (793,905,000)	807,920,000
Beginning balance, shares at Mar. 31, 2024		55,162,075		(38,033,179)
Stock issued under stock option plan, net of shares repurchased	3,105,000	$ 0	3,105,000	$ 0	0
Stock issued under stock option plan, net of shares repurchased, shares		32,803		0
Stock-based compensation expense	1,070,000	$ 0	1,070,000	$ 0	0
Purchase of treasury stock	$ (9,526,000)	$ (9,500,000)	0	$ (9,526,000)	0
Purchase of treasury stock, shares	(38,138)	0		(38,138)
Net Income (Loss)	$ 21,577,000	$ 0	0	$ 0	21,577,000
Ending balance at Jun. 30, 2024	$ 263,873,000	$ 3,000	$ 237,804,000	$ (803,431,000)	$ 829,497,000
Ending balance, shares at Jun. 30, 2024		55,194,878		(38,071,317)