LEASES - Quantitative information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Finance lease cost components:
Amortization of finance lease assets	$ 129	$ 136
Interest on finance lease liabilities	26	29
Total finance lease costs	155	165
Operating lease cost components:
Operating lease cost	765	786
Short-term lease cost	132	146
Variable lease cost	195	178
Sublease income	(45)	(44)
Total operating lease costs	1,047	1,066
Total lease cost	1,202	1,231
Supplemental cash flow information related to our operating leases is as follows for the three months ended March 31, 2020 and 2019:
Operating cash outflow from operating leases	$ 888	$ 875
Weighted-average remaining lease term-finance leases at end of period (in years)	1 year 2 months 12 days	1 year 7 months 6 days
Weighted-average remaining lease term-operating leases at end of period (in years)	10 years 6 months	10 years 10 months 24 days
Weighted-average discount rate-finance leases at end of period	9.20%	8.40%
Weighted-average discount rate-operating leases at end of period	8.80%	9.00%