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Condensed Consolidated Statements of Cash Flows (unaudited) - Reconciliation of Cash, Cash Equivalents and Restricted Cash and Supplemental Disclosure of Non-cash Investing and Financing Activities - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Reconciliation of cash, cash equivalents, and restricted cash |  |
Cash and cash equivalents | $ 1,260,220 | $ 214,960
Restricted cash | 7,800 | 7,800
Total cash, cash equivalents, and restricted cash | 1,268,020 | 222,760
Supplemental disclosures of non-cash investing and financing activities: |  |
Purchase of property and equipment accrued and not yet paid | 1,193 | 99
Deferred offering costs not yet paid | 0 | 647
Conversion of redeemable convertible preferred stock to common stock | $ 0 | $ 809

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