8. LEASES - Operating leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022
Leases
Operating lease, option to extend	true
Operating lease, renewal term	5 years
Operating lease right-of-use assets	$ 1,129	$ 889
Lease liabilities, current	580	537
Lease liabilities, non-current	503	361
Total operating lease liabilities	$ 1,083	$ 898
Minimum
Leases
Operating lease, term of lease	14 months
Maximum
Leases
Operating lease, term of lease	58 months