XML 100 R90.htm IDEA: XBRL DOCUMENT v3.8.0.1
Financial risk management objectives and policies - Liquidity risk (Table) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disclosure of financial liabilities [line items]    
Long-term debt $ 44,419 $ 69,569
Accrued liabilities and other payables 1,455 2,609
Trade payables 4,258 4,757
Total 50,132 76,935
Less than 3 months    
Disclosure of financial liabilities [line items]    
Long-term debt 1,145 1,966
Accrued liabilities and other payables 1,455 2,609
Trade payables 4,258 4,757
Total 6,858 9,332
3 to 12 months    
Disclosure of financial liabilities [line items]    
Long-term debt 12,989 23,268
Accrued liabilities and other payables 0 0
Trade payables 0 0
Total 12,989 23,268
1 to 5 years    
Disclosure of financial liabilities [line items]    
Long-term debt 30,285 44,335
Accrued liabilities and other payables 0 0
Trade payables 0 0
Total 30,285 44,335
More than 5 years    
Disclosure of financial liabilities [line items]    
Long-term debt 0 0
Accrued liabilities and other payables 0 0
Trade payables 0 0
Total $ 0 $ 0