XML 69 R54.htm IDEA: XBRL DOCUMENT v3.21.2
Accrued Expenses and Other Liabilities (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Accrued royalty payments $ 1,401 $ 1,796
Dividends payable   247
Zinc derivatives 144  
Employee profit sharing obligation 1,569  
Other payables 774 232
Total accrued expenses and other current liabilities 3,888 2,275
Other Liabilities, Noncurrent [Abstract]    
Accrued non-current labor obligation 682  
Deferred stock unit ("DSU") compensation liability 204  
Other long-term liabilities 15 13
Total other non-current liabilities 901 $ 13
Other Long-term Liabilities And Other Expenses [member]    
Other Liabilities, Noncurrent [Abstract]    
Accrued non-current labor obligation $ 700  
Deferred Profit Sharing [Member]    
Other Liabilities, Noncurrent [Abstract]    
Percentage of statutory profit sharing payable 10.00%  
Deferred Profit Sharing [Member] | Current Liabilities And Production Cost [Member]    
Employee profit sharing obligation $ 1,600