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Inventories (Table) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Inventories [Abstract] |  |
Lubricants | $ 328 | $ 363
Gas cylinders | 63 | 52
Bunkers | 270 | 101
Total | $ 661 | $ 516

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