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Summary of Significant Accounting Policies - Narrative (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) segment | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2023 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Restricted cash |  | $ 103,300,000 |  | $ 103,300,000 |  |  |
Non-marketable equity and other investments |  | 11,100,000 |  | 11,100,000 |  |  | $ 8,600,000
Impairment of non-marketable equity securities and other related assets | $ 7,000,000 |  |  |  | $ 22,100,000 | $ 5,300,000 |
Impairment or adjustments of non-marketable securities |  |  |  | 0 |  |  |
Contract asset |  | 4,600,000 |  | $ 4,600,000 |  |  | 4,900,000
Number of operating segments | segment |  |  |  | 1 |  |  |
Impairment of goodwill |  | 0 |  | $ 0 |  |  |
Revenue recognized in current period, delivered in prior periods |  | 18,200,000 | $ 7,400,000 | 31,900,000 | 12,200,000 |  |
Deferred revenue |  | 32,500,000 |  | 32,500,000 |  |  | 22,900,000
Deferred revenue long term |  | $ 3,000,000.0 |  | 3,000,000.0 |  |  | $ 5,000,000.0
Deferred revenue recognized |  |  |  | $ 12,600,000 | $ 12,700,000 |  |
Minimum |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Useful life (years) |  | 6 years |  | 6 years |  |  |
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01 |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Remaining performance obligation, expected recognition period |  | 1 year |  | 1 year |  |  |
Maximum |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Useful life (years) |  | 12 years |  | 12 years |  |  |
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01 |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Remaining performance obligation, expected recognition period |  | 2 years |  | 2 years |  |  |

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