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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