LEASES - SUMMARY OF RIGHT OF USE ASSETS AND LEASE LIABILITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Right-of-use assets	$ 2,337	$ 2,202
Liabilities
Operating lease liabilities - current	1,406	1,150
Operating lease liabilities - long-term	2,324	2,664
Total lease liabilities	$ 3,730	$ 3,814