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Derivative Warrant Liabilities (Details) - SPRING VALLEY ACQUISITION CORP | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 $ / shares shares | Dec. 31, 2021 D $ / shares shares | Dec. 31, 2020 shares
Class of Warrant or Right [Line Items] |  |  |
Public Warrants expiration term | 5 years |  |
Redemption price per public warrant (in dollars per share) | $ 0.01 |  |
Minimum threshold written notice period for redemption of public warrants | 30 days |  |
Threshold trading days for redemption of public warrants | 20 days |  |
Threshold consecutive trading days for redemption of public warrants | 30 days |  |
Restrictions on transfer period of time after business combination completion | 1 year |  |
Warrants |  |  |
Class of Warrant or Right [Line Items] |  |  |
Maximum period after business combination in which to file registration statement |  | 20 days |
Period of time within which registration statement is expected to become effective |  | 60 days |
Private Placement Warrant |  |  |
Class of Warrant or Right [Line Items] |  |  |
Number of warrants outstanding | shares | 8,900,000 | 8,900,000 | 8,900,000
Public Warrants |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrant exercise period condition one |  | P30D |
Warrant exercise period condition two |  | P1Y |
Public Warrants expiration term |  | 5 years |
Stock price trigger for redemption of public warrants (in dollars per share) |  | $ 9.20 |
Percentage of gross new proceeds to total equity proceeds used to measure dilution of warrant |  | 60 |
Trading period after business combination used to measure dilution of warrant | D |  | 20 |
Warrant exercise price adjustment multiple |  | 115 |
Warrant redemption price adjustment multiple |  | 180 |
Restrictions on transfer period of time after business combination completion |  | 30 days |
Number of warrants outstanding | shares | 11,500,000 | 11,500,000 | 11,500,000
Public Warrants | Redemption of Warrants When the Price per Class A Ordinary Share Equals or Exceeds $18.00 |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrant redemption condition minimum share price |  | $ 18.00 |
Redemption price per public warrant (in dollars per share) |  | $ 0.01 |
Minimum threshold written notice period for redemption of public warrants |  | 30 days |
Threshold trading days for redemption of public warrants | 20 days | 20 days |
Threshold consecutive trading days for redemption of public warrants |  | 30 days |
Threshold number of business days before sending notice of redemption to warrant holders | 3 days | 3 days |
Public Warrants | Redemption of Warrants When the Price per Class A Ordinary Share Equals or Exceeds $10.00 |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrant redemption condition minimum share price |  | $ 10.00 |
Warrant redemption condition minimum share price scenario two |  | 10.00 |
Redemption price per public warrant (in dollars per share) |  | $ 0.10 |
Minimum threshold written notice period for redemption of public warrants |  | 30 days |
Threshold trading days for redemption of public warrants | 20 days | 20 days |
Threshold consecutive trading days for redemption of public warrants |  | 30 days |
Threshold number of business days before sending notice of redemption to warrant holders | 3 days | 3 days |
Public Warrants | Redemption Of Warrants When Price Per Share Of Class Common Stock Less Than 18.00 |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrant redemption condition minimum share price |  | $ 18.00 |
Threshold trading days for redemption of public warrants |  | 20 days |
Threshold consecutive trading days for redemption of public warrants |  | 30 days |
Threshold number of business days before sending notice of redemption to warrant holders |  | 3 days |

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- Definition The minimum threshold period during which a written notice is required for redemption of warrants, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition In the event of dilution of the warrant, the multiple to be applied to the higher of the market price or the price of newly issued shares in order to obtain the adjusted exercise price. + References No definition available. + Details
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