2. REVENUE RECOGNITION - Revenue disaggregated (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Net revenues	$ 8,953	$ 7,797	$ 17,862	$ 16,588
Contract Manufacturers
Disaggregation of Revenue [Line Items]
Net revenues	1,671	1,988	3,206	5,852
Distribution
Disaggregation of Revenue [Line Items]
Net revenues	6,813	5,500	14,118	10,209
OEMs
Disaggregation of Revenue [Line Items]
Net revenues	$ 469	$ 309	$ 538	$ 527