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, 2022	$ 212,395,000	$ 3,000	$ 201,609,000	$ (654,520,000)	$ 665,303,000
Beginning balance, shares at Mar. 31, 2022		54,788,712		(37,219,625)
Stock issued under stock option plan, net of shares repurchased	1,851,000	$ 0	1,851,000	$ 0	0
Stock issued under stock option plan, net of shares repurchased, shares		43,646		0
Stock-based compensation expense share	1,379,000	$ 0	1,379,000	$ 0	0
Purchase of treasury stock	(26,688,000)	$ 0	0	$ (26,688,000)	0
Purchase of treasury stock, shares		0		(174,882)
Net income	16,691,000	$ 0	0	$ 0	16,691,000
Ending balance at Jun. 30, 2022	205,628,000	$ 3,000	204,839,000	$ (681,208,000)	681,994,000
Ending balance, shares at Jun. 30, 2022		54,832,358		(37,394,507)
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 share	1,312,000	$ 0	1,312,000	$ 0	0
Purchase of treasury stock	$ (17,787,000)	$ 0	0	$ (17,787,000)	0
Purchase of treasury stock, shares	(87,992)	0		(87,992)
Net income	$ 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