CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Loss [Abstract]
Net loss	$ (16,368)	$ (21,505)	$ (10,337)
Net unrealized gain (loss) on available-for-sale investments	(134)	(91)	108
Total comprehensive loss	$ (16,502)	$ (21,596)	$ (10,229)