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4. BALANCE SHEET DETAIL - Accounts receivable, net (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Mar. 31, 2020
--- | --- | ---
Accounts receivable, net: |  |
Accounts receivable | $ 3,785 | $ 6,415
Less: Allowances for doubtful accounts and other | (120) | (85)
Total accounts receivable, net | $ 3,665 | $ 6,330

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