OPERATING LEASES - COMPONENTS OF LEASE COSTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease Cost
Operating lease costs	$ 946	$ 1,143	$ 783
Variable lease costs	252	293	17
Total lease costs	$ 1,198	$ 1,436	$ 800