Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (21,001)	$ (34,067)	$ (13,164)
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation adjustments	(162)	460	(4)
Total comprehensive loss	$ (21,163)	$ (33,607)	$ (13,168)