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11. RELATED PARTY TRANSACTION (Details) - USD ($)
9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Related Party Transaction [Line Items]    
Amount owed to WNC $ 74,000 $ 243,000
Non-Recurring Engineering Services | Wistron Neweb Corp    
Related Party Transaction [Line Items]    
Non-recurring engineering service expense $ 349,000 $ 326,000