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Cash and cash equivalents and Restricted cash (Table) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Cash and cash equivalents [abstract]        
Cash on hand $ 17 $ 10    
Cash at banks 18,210 2,356    
Total $ 18,227 $ 2,366 $ 2,709 $ 46