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8. LEASES - Maturity of lease liabilities (Details) - USD ($)
12 Months Ended
Mar. 31, 2019
Mar. 31, 2021
Mar. 31, 2020
Maturity of Lease Liabilities      
2022   $ 383,000  
2023   248,000  
2024   100,000  
Total   731,000  
Less: Imputed interest   (32,000)  
Total operating lease liabilities   699,000 $ 640,000
Current   375,000 498,000
Non-current   $ 324,000 $ 142,000
Rent expense $ 566,000