3. BALANCE SHEET DETAIL - Prepaid expenses and other current assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Prepaid expenses and other current assets:
Prepaid tooling and masks	$ 558	$ 836
Prepaid income taxes	22	43
Escrow deposit	755	1,234
Other receivables	197	216
Other prepaid expenses and other current assets	878	448
Total prepaid expenses and other current assets	$ 2,410	$ 2,777