8. LEASES - Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Apr. 01, 2019
Leases
Operating lease, option to extend	true
Operating lease, renewal term	5 years
Operating lease right-of-use assets	$ 910	$ 1,100
Lease liabilities, current	559
Lease liabilities, non-current	380
Total operating lease liabilities	$ 939	$ 1,100
Minimum
Leases
Operating lease, term of lease	2 months
Maximum
Leases
Operating lease, term of lease	34 months