Condensed Consolidated Statements of Shareholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning balance at Mar. 31, 2022	$ 191,000	$ 227,184,000	$ 92,954,000	$ (5,066,000)	$ 315,263,000
Beginning balance (in shares) at Mar. 31, 2022	19,104,751
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation recognized under employee stock plans	$ 0	1,249,000	0	0	1,249,000
Exercise of stock options, net of shares withheld for employee taxes	$ 0	191,000	0	0	191,000
Exercise of stock options, net of shares withheld for employee taxes (in shares)	25,543
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes	$ 1,000	(895,000)	0	0	(894,000)
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes (in shares)	84,684
Foreign currency translation	$ 0	0	0	(868,000)	(868,000)
Net loss	0	0	(175,000)	0	(175,000)
Ending balance at Jun. 30, 2022	$ 192,000	227,729,000	92,779,000	(5,934,000)	314,766,000
Ending balance (in shares) at Jun. 30, 2022	19,214,978
Beginning balance at Mar. 31, 2023	$ 195,000	231,836,000	88,747,000	(303,000)	$ 320,475,000
Beginning balance (in shares) at Mar. 31, 2023	19,494,615				19,494,615
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation recognized under employee stock plans	$ 0	1,310,000	0	0	$ 1,310,000
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes	$ 1,000	(280,000)	0	0	(279,000)
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes (in shares)	104,530
Foreign currency translation	$ 0	0	0	3,343,000	3,343,000
Net loss	0	0	(1,410,000)	0	(1,410,000)
Ending balance at Jun. 30, 2023	$ 196,000	$ 232,866,000	$ 87,337,000	$ 3,040,000	$ 323,439,000
Ending balance (in shares) at Jun. 30, 2023	19,599,145				19,599,145