PROPERTY AND EQUIPMENT - Property and Equipment and Related Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 105	$ 1,009
Less: accumulated depreciation	(105)	(966)
Total Property and Equipment, Net	0	43
Lab equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	94	569
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	0	16
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7	99
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4	32
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 0	$ 293