LEASES - Maturity Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Aug. 14, 2019	Jan. 01, 2019
Leases, Operating [Abstract]
2020	$ 1,108
2021	1,377
2022	1,662
2023 and thereafter	8,434
Total lease payments	12,581
Less: imputed interest	(2,726)
Total operating lease liabilities	9,855	$ 8,100	$ 2,500
Expected payments on second expansion premises	$ 8,200
Lease term on second expansion premises	7 years