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Vessels, net - Consolidated Statement of Comprehensive Income (Table) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Vessels, net [Abstract] |  |  |
Vessels depreciation | $ 4,831 | $ 4,985 | $ 6,047
Depreciation on office furniture and equipment | 23 | 29 | 38
Total | $ 4,854 | $ 5,014 | $ 6,085

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