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The Company - Merger with Spring Valley (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Subscription Agreements |  |
Class of Stock [Line Items] |  |
Value of shares issued contingent on closing of the Merger | $ 211,000 | $ 211,000
Value of shares issued contingent on entry into definitive documents | $ 30,000 | $ 30,000
Class B ordinary share |  |
Class of Stock [Line Items] |  |
Share exchange ratio | 1 | 1
Class A Common Stock |  |
Class of Stock [Line Items] |  |
Share exchange ratio | 1 | 1

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