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COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) $ in Millions | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) ft² | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Oct. 31, 2021 ft² | Oct. 01, 2021 USD ($) | Feb. 01, 2021 USD ($) | Jan. 31, 2021 USD ($) ft² | Jan. 29, 2021 USD ($) | May 31, 2020 USD ($) ft²
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Lease agreement, extendable lease term |  |  |  | 5 years |  |  |  |  |
Operating lease, payments | $ | $ 6.9 |  |  |  |  |  |  |  |
Operating lease, expense | $ | $ 10.8 | $ 10.4 | $ 7.9 |  |  |  |  |  |
Operating lease, weighted average remaining lease term | 8 years |  |  |  |  |  |  |  |
Operating lease, weighted average discount rate, percent | 5.60% |  |  |  |  |  |  |  |
License obligations | $ | $ 0.8 |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |
Lease not yet commenced, area of real estate |  |  |  |  |  |  | 5,000 |  | 8,500
Lessee operating lease, lease not yet commenced amount | $ |  |  |  |  | $ 9.1 | $ 0.7 | $ 0.9 |  | $ 1.3
Reimbursement, tenant improvement allowance | $ |  |  |  |  | $ 2.6 |  |  |  |
Richmond, California | November 1, 2021 through August 31, 2031 |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) |  |  |  | 7,997 |  |  |  |  |
Valbonne, France |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Lease not yet commenced, area of real estate |  |  |  |  |  |  | 5,800 |  |
Lessee, operating lease, amount | $ |  |  |  |  |  |  | $ 0.8 | $ 0.6 |
Office And Laboratory | Brisbane, California |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) | 87,700 |  |  |  |  |  |  |  |
Office And Laboratory | Richmond, California | Expires in August 2031 |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) | 59,485 |  |  |  |  |  |  |  |
Office And Laboratory | Richmond, California | Expires in August 2026 |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) | 7,700 |  |  |  |  |  |  |  |
Research and Office Space | Valbonne, France | Property Subject To Operating Lease One |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Area of space leased (in sqft) | 25,600 |  |  |  |  |  |  |  |

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