13. SEGMENT AND GEOGRAPHIC INFORMATION - Revenue (Details) $ in Thousands	12 Months Ended
	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