Quarterly report pursuant to Section 13 or 15(d)

Restricted Cash (Details)

v3.21.1
Restricted Cash (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Restricted Cash (Details)    
Cash pledged for reclamation $ 7,860 $ 7,859
Restricted cash $ 7,860 $ 7,859