XML 103 R77.htm IDEA: XBRL DOCUMENT v3.8.0.1
DEBT - Schedule of Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jul. 31, 2015
Disclosure of detailed information about borrowings [line items]        
Current portion $ 15,864 $ 15,378    
Long term portion 79,741 89,445    
Total 95,605 104,823    
Equipment financing credit facility        
Disclosure of detailed information about borrowings [line items]        
Current portion 147 931    
Long term portion 0 188    
Finance leases        
Disclosure of detailed information about borrowings [line items]        
Current portion 1,229 1,153    
Long term portion 269 806    
Ecobank Loan III        
Disclosure of detailed information about borrowings [line items]        
Current portion 2,222 0    
Long term portion 7,337 0    
Total 10,000      
5% Convertible Debentures        
Disclosure of detailed information about borrowings [line items]        
Current portion $ 0 13,294    
Borrowings, interest rate 5.00%      
7% Convertible Debentures        
Disclosure of detailed information about borrowings [line items]        
Long term portion $ 42,515 47,617    
Total $ 42,515 47,617 $ 0  
Borrowings, interest rate 7.00%      
Royal Gold loan        
Disclosure of detailed information about borrowings [line items]        
Long term portion $ 18,817 18,496    
Total $ 20,000     $ 20,000
Borrowings, interest rate 8.00%     11.50%
Vendor agreement        
Disclosure of detailed information about borrowings [line items]        
Current portion $ 12,266 0    
Long term portion $ 10,803 $ 22,338    
Borrowings, interest rate 7.50%