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Commitments and Contingencies - Additional Information (Details) $ in Thousands |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 22, 2025 USD ($) | Dec. 31, 2024 USD ($) | Jan. 26, 2024 USD ($) | May 13, 2022 complaint | Mar. 14, 2022 USD ($) | Jul. 31, 2023 | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Dec. 23, 2024 advertisement | Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Operating leases right-of-use assets |  | $ 24,340 |  |  |  |  | $ 24,047 |  | $ 24,047 |  |  |
Short-term lease liability |  | 6,103 |  |  |  |  | 6,432 |  | 6,432 |  |  |
Operating lease liability, less current portion |  | 22,263 |  |  |  |  | $ 21,212 |  | $ 21,212 |  |  |
Operating lease, liability, current, statement of financial position [Extensible Enumeration] |  |  |  |  |  |  | Accrued and other liabilities |  | Accrued and other liabilities |  |  |
Litigation settlement expense |  |  |  |  |  |  | $ 0 | $ 0 | $ 5,710 | $ 0 |  |
Insurance matter |  |  |  |  |  |  |  |  | $ 15,000 |  |  |
iBox License and Collaboration Agreement |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
License period |  |  |  |  |  | 4 years |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Remaining lease terms |  |  |  |  |  |  | 8 months 1 day |  | 8 months 1 day |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Remaining lease terms |  |  |  |  |  |  | 7 years 4 months 2 days |  | 7 years 4 months 2 days |  |  |
CAREDX, INC. vs Natera Inc. |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Damages awarded |  |  |  |  | $ 44,900 |  |  |  |  |  |  |
Number of claims field | complaint |  |  |  | 2 |  |  |  |  |  |  |  |
Trial duration |  |  | 5 days |  |  |  |  |  |  |  |  |
Loss contingency, damages awarded, value |  |  | $ 96,300 |  |  |  |  |  |  |  |  |
Liability for damages awarded |  |  |  |  |  |  |  |  |  |  |  | $ 96,300
Loss contingency accrual, derecognized |  | $ 96,300 |  |  |  |  |  |  |  |  |  |
Range of possible loss (up to) |  |  |  |  |  |  |  | $ 96,300 |  | $ 96,300 |  |
CAREDX, INC. vs Natera Inc. | Compensatory Damages |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Damages awarded |  |  |  |  | 21,200 |  |  |  |  |  |  |
Number of advertisements | advertisement |  |  |  |  |  |  |  |  |  |  | 8 |
CAREDX, INC. vs Natera Inc. | Punitive Damages |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Damages awarded |  |  |  |  | $ 23,700 |  |  |  |  |  |  |
Securities Class Action |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Settlement amount | $ 20,250 |  |  |  |  |  |  |  |  |  |  |
Accrued litigation settlement expense |  |  |  |  |  |  | $ 20,250 |  | $ 20,250 |  |  |
Expected insurance proceeds |  |  |  |  |  |  | $ 14,900 |  | 14,900 |  |  |
Litigation settlement expense |  |  |  |  |  |  |  |  | $ 5,400 |  |  |

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