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Interest Expense and Finance Costs (Table) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Interest Expense and Finance Costs [Abstract]      
Interest payable on long-term borrowings $ 1,778 $ 2,430 $ 2,523
Bank charges 34 33 32
Amortization of debt discount 84 128 146
Other finance expenses 325 85 82
Total $ 2,221 $ 2,676 $ 2,783