4. BALANCE SHEET DETAIL - Prepaid expenses and other current assets (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025
Prepaid expenses and other current assets:
Prepaid tooling and masks	$ 1,632	$ 1,834
Other receivables	687	695
Other prepaid expenses and other current assets	693	432
Total prepaid expenses and other current assets	$ 3,012	$ 2,961