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Supplemental Financial Statement Information - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Cash and Cash Equivalents [Line Items] |  |
Restricted cash | $ 3,354 | $ 3,354
China |  |
Cash and Cash Equivalents [Line Items] |  |
Deposits | $ 3,500 |

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