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Fair Value - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets: |  |
Marketable securities | $ 96,752,000 | $ 0
Recurring |  |
Assets: |  |
Total cash and cash equivalents | 98,829,000 | 74,854,000
Marketable securities | 96,752,000 |
Total |  | 74,854,000
Liabilities: |  |
Loans payable |  | 12,880,000
Total |  | 12,880,000
Recurring | Cash in bank balances |  |
Assets: |  |
Total cash and cash equivalents | 12,035,000 |
Recurring | Money Market Funds |  |
Assets: |  |
Total cash and cash equivalents | 86,794,000 |
Recurring | Non-U.S. Government Securities |  |
Assets: |  |
Marketable securities | 11,265,000 |
Recurring | Corporate Debt Securities |  |
Assets: |  |
Marketable securities | 40,640,000 |
Recurring | Asset-backed Securities |  |
Assets: |  |
Marketable securities | 13,394,000 |
Recurring | Commercial Paper |  |
Assets: |  |
Marketable securities | 31,453,000 |
Recurring | Level 1 |  |
Assets: |  |
Total cash and cash equivalents | 98,829,000 | 74,854,000
Total |  | 74,854,000
Recurring | Level 1 | Cash in bank balances |  |
Assets: |  |
Total cash and cash equivalents | 12,035,000 |
Recurring | Level 1 | Money Market Funds |  |
Assets: |  |
Total cash and cash equivalents | 86,794,000 |
Recurring | Level 2 |  |
Assets: |  |
Marketable securities | 96,752,000 |
Recurring | Level 2 | Non-U.S. Government Securities |  |
Assets: |  |
Marketable securities | 11,265,000 |
Recurring | Level 2 | Corporate Debt Securities |  |
Assets: |  |
Marketable securities | 40,640,000 |
Recurring | Level 2 | Asset-backed Securities |  |
Assets: |  |
Marketable securities | 13,394,000 |
Recurring | Level 2 | Commercial Paper |  |
Assets: |  |
Marketable securities | $ 31,453,000 |
Recurring | Level 3 |  |
Liabilities: |  |
Loans payable |  | 12,880,000
Total |  | $ 12,880,000

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