6. INCOME TAXES - Provision for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Loss before income taxes:
U.S.	$ (11,132)	$ (10,775)	$ (8,574)
Foreign	(5,281)	(10,395)	(1,516)
Loss before income taxes	(16,413)	(21,170)	(10,090)
Current income tax expense (benefit):
U.S. federal		(379)	(39)
Foreign	(48)	714	274
State	1	(1)	1
Current income tax expense (benefit)	(47)	334	236
Deferred income tax expense (benefit):
U.S. federal	2	1	12
State			(1)
Deferred income tax expense (benefit)	2	1	11
Provision (benefit) for income taxes	$ (45)	$ 335	$ 247