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Fair Value Measurements - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Assets: |  |
Total available for sale investments | $ 101,041 | $ 128,878
Recurring basis |  |
Assets: |  |
Total included in cash and cash equivalents | 20,089 | 10,990
Total available for sale investments | 101,041 | 128,878
Total assets measured at fair value on a recurring basis | 121,130 | 139,868
Recurring basis | Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 12,860 | 1,260
Recurring basis | Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 63,386 | 88,390
Recurring basis | Commercial paper |  |
Assets: |  |
Total available for sale investments | 10,135 | 14,454
Recurring basis | Non U.S. government |  |
Assets: |  |
Total available for sale investments |  | 728
Recurring basis | U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 14,660 | 24,046
Recurring basis | Money market fund |  |
Assets: |  |
Total included in cash and cash equivalents | 20,089 | 10,990
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  |
Assets: |  |
Total included in cash and cash equivalents | 20,089 | 10,990
Total available for sale investments | 14,660 | 24,046
Total assets measured at fair value on a recurring basis | 34,749 | 35,036
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Commercial paper |  |
Assets: |  |
Total available for sale investments | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Non U.S. government |  |
Assets: |  |
Total available for sale investments |  | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 14,660 | 24,046
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Money market fund |  |
Assets: |  |
Total included in cash and cash equivalents | 20,089 | 10,990
Recurring basis | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Total included in cash and cash equivalents | 0 | 0
Total available for sale investments | 86,381 | 104,832
Total assets measured at fair value on a recurring basis | 86,381 | 104,832
Recurring basis | Significant Other Observable Inputs (Level 2) | Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 12,860 | 1,260
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 63,386 | 88,390
Recurring basis | Significant Other Observable Inputs (Level 2) | Commercial paper |  |
Assets: |  |
Total available for sale investments | 10,135 | 14,454
Recurring basis | Significant Other Observable Inputs (Level 2) | Non U.S. government |  |
Assets: |  |
Total available for sale investments |  | 728
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 0 | 0
Recurring basis | Significant Other Observable Inputs (Level 2) | Money market fund |  |
Assets: |  |
Total included in cash and cash equivalents | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Total included in cash and cash equivalents | 0 | 0
Total available for sale investments | 0 | 0
Total assets measured at fair value on a recurring basis | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Commercial paper |  |
Assets: |  |
Total available for sale investments | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Non U.S. government |  |
Assets: |  |
Total available for sale investments |  | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Money market fund |  |
Assets: |  |
Total included in cash and cash equivalents | $ 0 | $ 0

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