6. INCOME TAXES - Provision for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income (loss) before income taxes:
U.S.	$ (8,574)	$ (5,487)	$ (3,654)
Foreign	(1,516)	5,755	(408)
Income (loss) before income taxes	(10,090)	268	(4,062)
Current income tax expense (benefit):
U.S. federal	(39)	(28)	367
Foreign	274	121	153
State	1	1	1
Current income tax expense (benefit)	236	94	521
Deferred income tax expense (benefit):
U.S. federal	12	13	(90)
Foreign			22
State	(1)	(2)
Deferred income tax expense (benefit)	11	11	(68)
Provision for income taxes	$ 247	$ 105	$ 453