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COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2023 USD ($) ft² | Sep. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) ft² | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Oct. 31, 2021 ft² | Oct. 01, 2021 USD ($) | Feb. 01, 2021 USD ($) | Jan. 31, 2021 USD ($) ft² | Jan. 29, 2021 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease agreement, extendable lease term |  |  |  |  |  |  | 5 years |  |  |  |
Operating lease, payments |  |  |  | $ 7.3 | $ 10.1 | $ 6.9 |  |  |  |  |
Operating lease, expense |  |  |  | $ 9.4 | $ 11.0 | $ 10.8 |  |  |  |  |
Operating lease, weighted average remaining lease term | 6 years 1 month 6 days |  |  | 6 years 1 month 6 days |  |  |  |  |  |  |
Operating lease, weighted average discount rate, percent | 5.60% |  |  | 5.60% |  |  |  |  |  |  |
Impairment losses of right-of-use assets | $ 0.1 | $ 17.6 | $ 11.2 | $ 28.9 |  |  |  |  |  |  |
License obligations | 0.6 |  |  | 0.6 |  |  |  |  |  |  |
Lonza Netherlands, B.V. |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contractual obligation | $ 5.2 |  |  | $ 5.2 |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease agreement, extendable lease term | 5 years |  |  | 5 years |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease agreement, extendable lease term | 10 years |  |  | 10 years |  |  |  |  |  |  |
Richmond, California |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease not yet commenced, area of real estate | ft² |  |  |  |  |  |  |  |  |  | 5,000 |
Lessee operating lease, lease not yet commenced amount |  |  |  |  |  |  |  | $ 9.1 | $ 0.7 | $ 0.9 |
Reimbursement, tenant improvement allowance |  |  |  |  |  |  |  | $ 2.6 |  |  |
Richmond, California | November 2021 through August 2031 |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) | ft² |  |  |  |  |  |  | 7,997 |  |  |  |
Valbonne, France |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease not yet commenced, area of real estate | ft² |  |  |  |  |  |  |  |  |  | 5,800 |
Lessee, operating lease, amount |  |  |  |  |  |  |  |  |  | $ 0.8 | $ 0.6
Office and Laboratory | Richmond, California | Expires in August 2031 |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) | ft² | 59,485 |  |  | 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 |  |  | 7,700 |  |  |  |  |  |  |
Office and Laboratory | Brisbane, California |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) | ft² | 103,089 |  |  | 103,089 |  |  |  |  |  |  |
Research and Office Space | Valbonne, France |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) | ft² | 28,048 |  |  | 28,048 |  |  |  |  |  |  |

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