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13. SEGMENT AND GEOGRAPHIC INFORMATION - Revenue (Details) $ in Thousands | 12 Months Ended
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Mar. 31, 2025 USD ($) segment | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($)
Net revenues by geographic area |  |  |
Net revenues | $ 20,518 | $ 21,765 | $ 29,691
Number of reporting units | segment | 1 |  |
United States |  |  |
Net revenues by geographic area |  |  |
Net revenues | $ 8,152 | 11,461 | 14,435
China |  |  |
Net revenues by geographic area |  |  |
Net revenues | 5,326 | 1,262 | 1,582
Singapore |  |  |
Net revenues by geographic area |  |  |
Net revenues | 2,009 | 2,034 | 4,941
Netherlands |  |  |
Net revenues by geographic area |  |  |
Net revenues | 554 | 2,825 | 3,087
Germany |  |  |
Net revenues by geographic area |  |  |
Net revenues | 3,716 | 3,498 | 4,474
Rest of the world |  |  |
Net revenues by geographic area |  |  |
Net revenues | $ 761 | $ 685 | $ 1,172

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