COMMITMENTS AND CONTINGENCIES - Leases (Details) $ in Thousands			1 Months Ended	12 Months Ended
	Nov. 23, 2021 USD ($)	Jun. 01, 2021 USD ($)	May 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	May 03, 2018 ft²
Lessee, Lease, Description [Line Items]
Letter of credit terminated amount			$ 60
Borrowing rate used in modification	5.97%	5.74%
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 486	$ 143		$ 629
Cambridge Lease
Lessee, Lease, Description [Line Items]
Standby letter of credit		$ 100
Cambridge Lease | Sublease
Lessee, Lease, Description [Line Items]
Lease space (in square feet) | ft²					5,104