2. REVENUE RECOGNITION - Revenue disaggregated (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net revenues	$ 8,909	$ 8,791
Contract Manufacturers
Disaggregation of Revenue [Line Items]
Net revenues	1,535	3,863
Distribution
Disaggregation of Revenue [Line Items]
Net revenues	7,305	4,710
OEMs
Disaggregation of Revenue [Line Items]
Net revenues	$ 69	$ 218