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Summary of Significant Accounting Policies - Risks and Uncertainties (Details) - Customer Concentration Risk - Medicare
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Revenue Benchmark          
Concentration Risk [Line Items]          
Concentration risk (as a percent) 16.90% 13.60% 16.10% 13.90%  
Accounts Receivable          
Concentration Risk [Line Items]          
Concentration risk (as a percent)     13.60%   14.10%