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11. RELATED PARTY TRANSACTION (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2023
Related Party Transaction [Line Items] |  |  |  |  |
Amount owed to WNC | $ 0 |  | $ 0 |  | $ 8,000
Non-Recurring Engineering Services | Wistron Neweb Corp |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Non-recurring engineering service expense | $ 0 | $ 140,000 | $ 0 | $ 197,000 |

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