OPERATING LEASES - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lease costs
Operating lease cost	$ 1,862	$ 1,980
Short-term lease cost	17	40
Sublease income	(629)	(378)
Total lease cost	$ 1,250	$ 1,642