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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets carried at fair value |  |
Fair value | $ 218,489 | $ 398,119
Money market funds |  |
Assets carried at fair value |  |
Fair value | 15,763 | 7,402
U.S. Government bonds and notes |  |
Assets carried at fair value |  |
Fair value | 96,371 | 102,812
Corporate notes, bonds and commercial paper |  |
Assets carried at fair value |  |
Fair value | 106,355 | 287,905
Recurring basis |  |
Assets carried at fair value |  |
Total assets carried at fair value | 218,489 | 398,119
Liabilities carried at fair value |  |
Earn-out consideration related to PLDA acquisition | 14,800 | 16,900
Total liabilities carried at fair value | 14,800 | 16,900
Recurring basis | Money market funds |  |
Assets carried at fair value |  |
Fair value | 15,763 | 7,402
Recurring basis | U.S. Government bonds and notes |  |
Assets carried at fair value |  |
Fair value | 96,371 | 102,812
Recurring basis | Corporate notes, bonds and commercial paper |  |
Assets carried at fair value |  |
Fair value | 106,355 | 287,905
Recurring basis | Quoted market prices in active markets (Level 1) |  |
Assets carried at fair value |  |
Total assets carried at fair value | 15,763 | 7,402
Liabilities carried at fair value |  |
Earn-out consideration related to PLDA acquisition | 0 | 0
Total liabilities carried at fair value | 0 | 0
Recurring basis | Quoted market prices in active markets (Level 1) | Money market funds |  |
Assets carried at fair value |  |
Fair value | 15,763 | 7,402
Recurring basis | Quoted market prices in active markets (Level 1) | U.S. Government bonds and notes |  |
Assets carried at fair value |  |
Fair value | 0 | 0
Recurring basis | Quoted market prices in active markets (Level 1) | Corporate notes, bonds and commercial paper |  |
Assets carried at fair value |  |
Fair value | 0 | 0
Recurring basis | Significant other observable inputs (Level 2) |  |
Assets carried at fair value |  |
Total assets carried at fair value | 202,726 | 390,717
Liabilities carried at fair value |  |
Earn-out consideration related to PLDA acquisition | 0 | 0
Total liabilities carried at fair value | 0 | 0
Recurring basis | Significant other observable inputs (Level 2) | Money market funds |  |
Assets carried at fair value |  |
Fair value | 0 | 0
Recurring basis | Significant other observable inputs (Level 2) | U.S. Government bonds and notes |  |
Assets carried at fair value |  |
Fair value | 96,371 | 102,812
Recurring basis | Significant other observable inputs (Level 2) | Corporate notes, bonds and commercial paper |  |
Assets carried at fair value |  |
Fair value | 106,355 | 287,905
Recurring basis | Significant unobservable inputs (Level 3) |  |
Assets carried at fair value |  |
Total assets carried at fair value | 0 | 0
Liabilities carried at fair value |  |
Earn-out consideration related to PLDA acquisition | 14,800 | 16,900
Total liabilities carried at fair value | 14,800 | 16,900
Recurring basis | Significant unobservable inputs (Level 3) | Money market funds |  |
Assets carried at fair value |  |
Fair value | 0 | 0
Recurring basis | Significant unobservable inputs (Level 3) | U.S. Government bonds and notes |  |
Assets carried at fair value |  |
Fair value | 0 | 0
Recurring basis | Significant unobservable inputs (Level 3) | Corporate notes, bonds and commercial paper |  |
Assets carried at fair value |  |
Fair value | $ 0 | $ 0

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