LEASES - Summary of Lease Cost and Other Operating Lease Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)
Lease Cost
Operating lease cost	$ 274	$ 386
Short-term lease cost	211	476
Variable lease cost	9	31
Total lease cost	$ 494	893
Other Operating Lease Information
Cash paid for amounts included in the measurement of lease liability		$ 167
Weighted-average remaining lease term	7 years 4 months 24 days	7 years 4 months 24 days
Weighted-average discount rate	5.40%	5.40%