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Restricted Cash (Tables)
 12 Months Ended
Dec. 31, 2020
Cash and Cash Equivalents [Abstract]  
Components of restricted cash
The following table provides the components of restricted cash (in thousands):
December 31,
2020		December 31,
2019
Reclamation surety bond cash collateral$39,677 $39,477 
First Lien Agreement restricted cash - Note 10— 3,270 
Total$39,677 $42,747