LEASES - Components of Lease Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Finance lease cost
Amortization of leased assets	$ 61
Interest on lease liabilities	25
Operating lease cost	2,135
Short-term lease cost	296
Total lease cost	$ 2,517
Weighted-average remaining lease term, operating leases	5 years 2 months 12 days
Weighted-average remaining lease term, finance leases	2 years 4 months 24 days
Weighted-average discount rate, operating leases	12.10%
Weighted-average discount rate, finance leases	13.40%