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12. SEGMENT AND GEOGRAPHIC INFORMATION - Revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)
Net revenues by geographic area
Net revenues	$ 6,444	$ 4,550	$ 12,727	$ 9,221
Number of reporting units | segment			1
United States
Net revenues by geographic area
Net revenues	3,414	1,885	$ 7,887	3,451
China
Net revenues by geographic area
Net revenues	995	797	1,399	1,895
Singapore
Net revenues by geographic area
Net revenues	624	505	1,108	1,280
Netherlands
Net revenues by geographic area
Net revenues	106	237	209	273
Germany
Net revenues by geographic area
Net revenues	1,051	978	1,622	1,908
Rest of the world
Net revenues by geographic area
Net revenues	$ 254	$ 148	$ 502	$ 414

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