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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | $ 146,288 | $ 398,119
Money market funds |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 16,159 | 7,402
U.S. Government bonds and notes |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 66,680 | 102,812
Corporate notes, bonds and commercial paper |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 63,449 | 287,905
Recurring basis |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 146,288 | 398,119
Recurring basis | Money market funds |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 16,159 | 7,402
Recurring basis | U.S. Government bonds and notes |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 66,680 | 102,812
Recurring basis | Corporate notes, bonds and commercial paper |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 63,449 | 287,905
Recurring basis | Quoted market prices in active markets (Level 1) |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 16,159 | 7,402
Recurring basis | Quoted market prices in active markets (Level 1) | Money market funds |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 16,159 | 7,402
Recurring basis | Quoted market prices in active markets (Level 1) | U.S. Government bonds and notes |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 0 | 0
Recurring basis | Quoted market prices in active markets (Level 1) | Corporate notes, bonds and commercial paper |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 0 | 0
Recurring basis | Significant other observable inputs (Level 2) |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 130,129 | 390,717
Recurring basis | Significant other observable inputs (Level 2) | Money market funds |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 0 | 0
Recurring basis | Significant other observable inputs (Level 2) | U.S. Government bonds and notes |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 66,680 | 102,812
Recurring basis | Significant other observable inputs (Level 2) | Corporate notes, bonds and commercial paper |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 63,449 | 287,905
Recurring basis | Significant unobservable inputs (Level 3) |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 0 | 0
Recurring basis | Significant unobservable inputs (Level 3) | Money market funds |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 0 | 0
Recurring basis | Significant unobservable inputs (Level 3) | U.S. Government bonds and notes |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | 0 | 0
Recurring basis | Significant unobservable inputs (Level 3) | Corporate notes, bonds and commercial paper |  |
Financial assets subject to fair value measurements and the necessary disclosures |  |
Fair value, available-for-sale securities | $ 0 | $ 0

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