LEASES - Components of Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use-asset, net	$ 5,151	$ 6,490
Current operating lease liabilities	2,112	2,244
Long-term operating lease liabilities	3,057	4,267
Total operating lease liability	5,169	6,511
Operating lease costs	2,704	2,434
Short-term lease costs	281	767
Sublease Income	(99)	(247)
Net lease costs	2,886	2,954
Operating cash flows form operating leases	2,707	2,414
Right-of-use assets obtained in exchange for lease obligations	$ 1,048	$ 2,064
Weighted average discount rate	5.01%	5.77%
Weighted average remaining lease term	2 years 9 months 18 days	3 years 3 months 18 days
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent