8. LEASES - Maturity of lease liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Apr. 01, 2019
Maturity of Lease Liabilities
2020 (Remaining six months)	$ 325
2021	521
2022	149
2023	7
Total	1,002
Less: Imputed interest	53
Total operating lease liabilities	949	$ 1,100
Current	620
Non-current	329
Future minimum lease payments
2020 (Remaining six months)	325
2021	521
2022	149
2023	7
Total	$ 1,002