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v3.25.1

Summary of Significant Accounting Policies - Narrative (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 USD ($) revenue_source segment | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2024 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Restricted cash | $ 105,281,000 | $ 100,230,000 |  | $ 104,215,000
Non-marketable equity and other investments | 11,100,000 |  |  | 16,100,000
Impairment of non-marketable equity securities | 5,000,000 |  | $ 22,100,000 |
Impairment or adjustments of non-marketable securities | 0 | 0 |  |
Contract asset | $ 4,200,000 |  |  | 3,400,000
Number of operating segments | segment | 1 |  |  |
Impairment of goodwill | $ 0 |  |  |
Number of revenue sources | revenue_source | 4 |  |  |
Revenue recognized in current period, delivered in prior periods | $ 12,200,000 | 15,800,000 |  |
Deferred revenue | 44,000,000.0 |  |  | 41,600,000
Deferred revenue long term | 7,700,000 |  |  | 6,100,000
Deferred revenue recognized | 10,100,000 | $ 7,100,000 |  |
TwinStrand Biosciences And University Of Washington vs. Guardant Health, Inc. |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Restricted cash | $ 104,600,000 |  |  | $ 103,600,000
Minimum |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Useful life (years) | 6 years |  |  |
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01 |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Remaining performance obligation, expected recognition period | 1 year |  |  |
Maximum |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Useful life (years) | 12 years |  |  |
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01 |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Remaining performance obligation, expected recognition period | 2 years |  |  |

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