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Fair Value Measurements - Summary of Changes in Estimated Fair Value of Financial Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Fred Hutch | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |
Success Payment Liabilities |  |  |  |
Success payment expense (gain) | $ 500 | $ 2,200 | $ (600) | $ (600)
Stanford | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |
Success Payment Liabilities |  |  |  |
Success payment expense (gain) | 600 | $ 1,400 | 0 | $ 400
Success Payment Liabilities | Level 3 |  |  |  |
Success Payment Liabilities |  |  |  |
Beginning Balance |  |  | 4,356 |
Change in fair value |  |  | (603) |
Ending Balance | $ 3,753 |  | $ 3,753 |

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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