LEASES - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) contract	Dec. 31, 2020 USD ($) ft²	Jul. 31, 2020 USD ($) ft²	Feb. 28, 2019 ft²
Lessee, Lease, Description [Line Items]
Number of leases | contract	2
Gain on lease termination | $	$ 5
Operating lease expense | $	$ 3,921	$ 1,545
Principal office, July 2020 lease
Lessee, Lease, Description [Line Items]
Lease term			7 years
Lease term, optional extension			5 years
Area leased | ft²			25,578
Letter of credit outstanding | $			$ 1,168
Principal office, February 2019 lease
Lessee, Lease, Description [Line Items]
Lease term, optional extension				3 years
Area leased | ft²				2,357
Office and laboratory, December 2020 lease
Lessee, Lease, Description [Line Items]
Lease term		11 years
Lease term, optional extension		5 years
Area leased | ft²		18,120