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Commitments (Table) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Disclosure of finance lease and operating lease by lessor [line items]    
Total $ 2,991 $ 1,548
Within one year    
Disclosure of finance lease and operating lease by lessor [line items]    
Total $ 2,991 $ 1,548