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Cash and cash equivalents and Restricted cash (Table) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash and cash equivalents [abstract]        
Cash on hand $ 0 $ 1    
Cash at banks 2,756 162    
Total $ 2,756 $ 163 $ 2,005 $ 5,083