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COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Thousands		3 Months Ended		12 Months Ended
	Feb. 05, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) ft²	Dec. 31, 2023 USD ($)
Commitments And Contingencies [Line Items]
Lessee, operating lease, required notice of termination	30 days
Lessee, required letter of credit outstanding, amount	$ 1,500
Lessee, operating lease, discount rate	9.60%
Lease liabilities	$ 1,900			$ 5,579	$ 5,037
Operating lease, payments				$ 7,500	7,300
Operating lease, weighted average remaining lease term				5 years 2 months 12 days
Operating lease, weighted average discount rate, percent				7.70%
Impairment losses of right-of-use assets		$ 900	$ 2,000	$ 2,900	$ 28,900
License obligations				500
Thermo Fisher Scientific Inc.
Commitments And Contingencies [Line Items]
Contractual obligation				$ 2,900
Minimum
Commitments And Contingencies [Line Items]
Lease agreement, extendable lease term				5 years
Maximum
Commitments And Contingencies [Line Items]
Lease agreement, extendable lease term				10 years
Richmond, California
Commitments And Contingencies [Line Items]
Reduction to right of use asset from lease modification	$ 1,900
Office and Laboratory | Richmond, California | Expires in August 2031
Commitments And Contingencies [Line Items]
Area of space leased (in sqft) | ft²				59,485
Office and Laboratory | Richmond, California | Expires in August 2026
Commitments And Contingencies [Line Items]
Area of space leased (in sqft) | ft²				7,700
Office and Laboratory | Brisbane, California
Commitments And Contingencies [Line Items]
Area of space leased (in sqft) | ft²				103,089

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