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Prepaid Expenses and Other Current Assets (Table) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Prepaid Expenses And Other Assets [Abstract]    
Prepaid voyage costs $ 134 $ 14
Inventory 1,004 220
Other 757 671
Total prepaid expenses and other current assets $ 1,895 $ 905