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Summary of Significant Accounting Policies - Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Subsidiary, Sale of Stock [Line Items] |  |
Total cash and cash equivalents | $ 304,320 | $ 100,130
Preferred stock warrant liability | 0 | 177
Fair Value, Measurements, Recurring |  |
Subsidiary, Sale of Stock [Line Items] |  |
Cash | 13,621 | 1,502
Cash equivalents | 290,699 | 98,628
Total cash and cash equivalents | 304,320 | 100,130
Preferred stock warrant liability | 0 | 177
Loan facility derivative liability | 1,496 | 1,782
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 |  |
Subsidiary, Sale of Stock [Line Items] |  |
Cash | 13,621 | 1,502
Cash equivalents | 290,699 | 98,628
Total cash and cash equivalents | 304,320 | 100,130
Preferred stock warrant liability | 0 | 0
Loan facility derivative liability | 0 | 0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |
Subsidiary, Sale of Stock [Line Items] |  |
Cash | 0 | 0
Cash equivalents | 0 | 0
Total cash and cash equivalents | 0 | 0
Preferred stock warrant liability | 0 | 0
Loan facility derivative liability | 0 | 0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 |  |
Subsidiary, Sale of Stock [Line Items] |  |
Cash | 0 | 0
Cash equivalents | 0 | 0
Total cash and cash equivalents | 0 | 0
Preferred stock warrant liability | 0 | 177
Loan facility derivative liability | $ 1,496 | $ 1,782

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