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Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Contributions to Revenue and Receivables by Payer (Details) - Customer Concentration Risk | 3 Months Ended | 9 Months Ended | 12 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Net Revenue | Payer A |  |  |  |  |
Accounts Receivable And Net Revenue [Line Items] |  |  |  |  |
Concentration risk | 22.40% | 27.70% | 28.30% | 30.00% |
Net Revenue | Payer B |  |  |  |  |
Accounts Receivable And Net Revenue [Line Items] |  |  |  |  |
Concentration risk | 15.00% | 15.40% | 15.80% | 14.80% |
Net Revenue | Payer C |  |  |  |  |
Accounts Receivable And Net Revenue [Line Items] |  |  |  |  |
Concentration risk |  | 10.70% | 10.00% | 10.60% |
Net Revenue | Payer D |  |  |  |  |
Accounts Receivable And Net Revenue [Line Items] |  |  |  |  |
Concentration risk |  | 12.00% |  |  |
Receivables, Net and Receivables-Related Parties and Other Receivables | Payer A |  |  |  |  |
Accounts Receivable And Net Revenue [Line Items] |  |  |  |  |
Concentration risk |  |  | 36.30% |  | 38.90%
Receivables, Net and Receivables-Related Parties and Other Receivables | Payer E |  |  |  |  |
Accounts Receivable And Net Revenue [Line Items] |  |  |  |  |
Concentration risk |  |  | 15.70% |  | 16.10%
Receivables, Net and Receivables-Related Parties and Other Receivables | Payer F |  |  |  |  |
Accounts Receivable And Net Revenue [Line Items] |  |  |  |  |
Concentration risk |  |  |  |  | 18.30%

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