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4. BALANCE SHEET DETAIL - Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Mar. 31, 2020
Inventories:    
Work-in-progress $ 1,561 $ 1,650
Finished goods 2,764 2,612
Inventory at distributors 18 20
Total inventory $ 4,343 $ 4,282