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Fair Value Measurements - Schedule of Financial Assets and Liabilities Subject to Fair Value Measurements on a Recurring Basis and the Level of Inputs Used (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets: |  |
Marketable investments | $ 418,875 | $ 410,031
Liabilities: |  |
Warrant liabilities | 31,230 | 343,400
U.S. treasury securities |  |
Assets: |  |
Marketable investments | 161,465 | 155,347
U.S. agency and government sponsored securities |  |
Assets: |  |
Marketable investments | 4,970 | 19,996
Corporate bonds |  |
Assets: |  |
Marketable investments | 165,190 | 45,450
Asset-backed securities |  |
Assets: |  |
Marketable investments | 46,466 | 7,018
Fair Value, Recurring |  |
Assets: |  |
Total cash equivalents | 26,604 | 198,292
Marketable equity investments | 44,216 |
Total marketable investments | 462,141 | 276,710
Liabilities: |  |
Warrant liabilities | 31,230 | 343,400
Fair Value, Recurring | Public Warrants |  |
Liabilities: |  |
Warrant liabilities |  | 228,933
Fair Value, Recurring | Private Warrants |  |
Liabilities: |  |
Warrant liabilities | 31,230 | 114,467
Fair Value, Recurring | U.S. treasury securities |  |
Assets: |  |
Total cash equivalents |  | 24,999
Marketable investments | 161,465 | 130,348
Fair Value, Recurring | U.S. agency and government sponsored securities |  |
Assets: |  |
Marketable investments | 4,970 | 19,996
Fair Value, Recurring | Commercial paper |  |
Assets: |  |
Marketable investments | 39,834 | 73,898
Fair Value, Recurring | Corporate bonds |  |
Assets: |  |
Marketable investments | 165,190 | 45,450
Fair Value, Recurring | Asset-backed securities |  |
Assets: |  |
Marketable investments | 46,466 | 7,018
Fair Value, Recurring | Money market funds |  |
Assets: |  |
Total cash equivalents | 25,654 | 64,971
Fair Value, Recurring | Commercial paper |  |
Assets: |  |
Total cash equivalents | 950 | 108,322
Level 1 | Fair Value, Recurring |  |
Assets: |  |
Total cash equivalents | 25,654 | 89,970
Marketable equity investments | 44,216 |
Total marketable investments | 205,681 | 130,348
Liabilities: |  |
Warrant liabilities | 0 | 228,933
Level 1 | Fair Value, Recurring | Public Warrants |  |
Liabilities: |  |
Warrant liabilities |  | 228,933
Level 1 | Fair Value, Recurring | Private Warrants |  |
Liabilities: |  |
Warrant liabilities | 0 | 0
Level 1 | Fair Value, Recurring | U.S. treasury securities |  |
Assets: |  |
Total cash equivalents |  | 24,999
Marketable investments | 161,465 | 130,348
Level 1 | Fair Value, Recurring | U.S. agency and government sponsored securities |  |
Assets: |  |
Marketable investments | 0 | 0
Level 1 | Fair Value, Recurring | Commercial paper |  |
Assets: |  |
Marketable investments | 0 | 0
Level 1 | Fair Value, Recurring | Corporate bonds |  |
Assets: |  |
Marketable investments | 0 | 0
Level 1 | Fair Value, Recurring | Asset-backed securities |  |
Assets: |  |
Marketable investments | 0 | 0
Level 1 | Fair Value, Recurring | Money market funds |  |
Assets: |  |
Total cash equivalents | 25,654 | 64,971
Level 1 | Fair Value, Recurring | Commercial paper |  |
Assets: |  |
Total cash equivalents | 0 | 0
Level 2 | Fair Value, Recurring |  |
Assets: |  |
Total cash equivalents | 950 | 108,322
Marketable equity investments | 0 |
Total marketable investments | 256,460 | 146,362
Liabilities: |  |
Warrant liabilities | 0 | 114,467
Level 2 | Fair Value, Recurring | Public Warrants |  |
Liabilities: |  |
Warrant liabilities |  | 0
Level 2 | Fair Value, Recurring | Private Warrants |  |
Liabilities: |  |
Warrant liabilities | 0 | 114,467
Level 2 | Fair Value, Recurring | U.S. treasury securities |  |
Assets: |  |
Total cash equivalents |  | 0
Marketable investments | 0 | 0
Level 2 | Fair Value, Recurring | U.S. agency and government sponsored securities |  |
Assets: |  |
Marketable investments | 4,970 | 19,996
Level 2 | Fair Value, Recurring | Commercial paper |  |
Assets: |  |
Marketable investments | 39,834 | 73,898
Level 2 | Fair Value, Recurring | Corporate bonds |  |
Assets: |  |
Marketable investments | 165,190 | 45,450
Level 2 | Fair Value, Recurring | Asset-backed securities |  |
Assets: |  |
Marketable investments | 46,466 | 7,018
Level 2 | Fair Value, Recurring | Money market funds |  |
Assets: |  |
Total cash equivalents | 0 | 0
Level 2 | Fair Value, Recurring | Commercial paper |  |
Assets: |  |
Total cash equivalents | 950 | 108,322
Level 3 | Fair Value, Recurring |  |
Assets: |  |
Total cash equivalents | 0 | 0
Marketable equity investments | 0 |
Total marketable investments | 0 | 0
Liabilities: |  |
Warrant liabilities | 31,230 | 0
Level 3 | Fair Value, Recurring | Public Warrants |  |
Liabilities: |  |
Warrant liabilities |  | 0
Level 3 | Fair Value, Recurring | Private Warrants |  |
Liabilities: |  |
Warrant liabilities | 31,230 | 0
Level 3 | Fair Value, Recurring | U.S. treasury securities |  |
Assets: |  |
Total cash equivalents |  | 0
Marketable investments | 0 | 0
Level 3 | Fair Value, Recurring | U.S. agency and government sponsored securities |  |
Assets: |  |
Marketable investments | 0 | 0
Level 3 | Fair Value, Recurring | Commercial paper |  |
Assets: |  |
Marketable investments | 0 | 0
Level 3 | Fair Value, Recurring | Corporate bonds |  |
Assets: |  |
Marketable investments | 0 | 0
Level 3 | Fair Value, Recurring | Asset-backed securities |  |
Assets: |  |
Marketable investments | 0 | 0
Level 3 | Fair Value, Recurring | Money market funds |  |
Assets: |  |
Total cash equivalents | 0 | 0
Level 3 | Fair Value, Recurring | Commercial paper |  |
Assets: |  |
Total cash equivalents | $ 0 | $ 0

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