Fair Value of Financial Instruments - Schedule of Change in Fair Value of Success Payment Liabilities Based on Level 3 Inputs (Details) - Success Payment Liabilities - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||
| Beginning Balance | $ 18,300 | $ 42,200 |
| Change in fair value | (7,500) | (23,900) |
| Ending Balance | 10,800 | 18,300 |
| Harvard | ||
| Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||
| Beginning Balance | 9,000 | 21,000 |
| Change in fair value | (3,800) | (12,000) |
| Ending Balance | 5,200 | 9,000 |
| Broad Institute | ||
| Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||
| Beginning Balance | 9,300 | 21,200 |
| Change in fair value | (3,700) | (11,900) |
| Ending Balance | $ 5,600 | $ 9,300 |