Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit
Balance (in shares) at Mar. 31, 2022		42,416
Beginning balance, treasury stock (in shares) at Mar. 31, 2022			0
Balance at Mar. 31, 2022	$ 75,250	$ 4,242	$ 0	$ 186,720	$ (115,712)
Increase (Decrease) in Stockholders' Equity
Stock option exercises (in shares)		60
Stock option exercises	105	$ 7		98
Issuance of shares pursuant to Employee Stock Purchase Plan (in shares)		180
Issuance of shares pursuant to Employee Stock Purchase Plan	490	$ 19		471
Stock-based compensation	2,890			2,890
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes (in shares)		152
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes	(83)	$ 14		(97)
Treasury stock purchases (in shares)			300
Treasury stock purchases	(884)		$ (884)
Deferred shares held within rabbi trust (in shares)			69
Deferred shares held within rabbi trust	(7)		$ (7)
Net income	$ (14,855)				(14,855)
Balance (in shares) at Mar. 31, 2023	42,808	42,808
Ending balance, treasury stock (in shares) at Mar. 31, 2023			369
Balance at Mar. 31, 2023	$ 62,906	$ 4,282	$ (891)	190,082	(130,567)
Increase (Decrease) in Stockholders' Equity
Stock option exercises (in shares)		173
Stock option exercises	537	$ 18		519
Issuance of shares pursuant to Employee Stock Purchase Plan (in shares)		173
Issuance of shares pursuant to Employee Stock Purchase Plan	581	$ 17		564
Stock-based compensation	2,965			2,965
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes (in shares)		118
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes	(16)	$ 11		(27)
Issuance of shares pursuant to vesting of performance stock units, net of payroll withholding taxes (in shares)		40
Issuance of shares pursuant to vesting of performance stock units, net of payroll withholding taxes	(14)	$ 4		(18)
Treasury stock purchases (in shares)			40
Treasury stock purchases	(183)		$ (183)
Deferred shares held within rabbi trust (in shares)			79
Deferred shares held within rabbi trust	0		$ (8)	8
Treasury stock retirement (in shares)		(340)	(340)
Retirement of treasury stock	0	$ (34)	$ 1,067		(1,033)
Net income	$ 3,131				3,131
Balance (in shares) at Mar. 31, 2024	42,972	42,972
Ending balance, treasury stock (in shares) at Mar. 31, 2024			148
Balance at Mar. 31, 2024	$ 69,907	$ 4,298	$ (15)	$ 194,093	$ (128,469)