Fair Value Measurements - Summary of Estimated Fair Value of Success Payment Liabilities Unobservable Inputs (Details) |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
|
| Expected Stock Price Volatility | Cobalt | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Fair value measurement input | 0.95 | 0.775 |
| Expected Stock Price Volatility | Harvard | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Fair value measurement input | 0.95 | 0.775 |
| Expected Term (Years) | Cobalt | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Fair value measurement input expected term (years) | 12 years 4 months 24 days | 13 years 1 month 6 days |
| Expected Term (Years) | Harvard | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Fair value measurement input expected term (years) | 4 years 6 months | 5 years 2 months 12 days |