Geographic Information - Schedule of Revenue From Customer By Geographic Area (Detail) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue		$ 38,514	$ 43,379
United States [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue		21,078	28,135
France [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue		9,558	7,406
Japan [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue		4,644	4,506
Other foreign countries [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	[1]	$ 3,234	$ 3,332

[1] No individual country represented more than 10% of the respective totals.