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Administrative Expenses (Table) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Administrative Expenses [Abstract]      
Personnel expenses $ 628 $ 1,040 $ 981
Audit fees 101 111 112
Travelling expenses 3 4 9
Consulting fees 54 28 90
Communication 11 19 15
Stationery 2 2 2
Greek authorities tax (note 20) 116 264 256
Other 309 626 286
Total $ 1,224 $ 2,094 $ 1,751