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Accrued Liabilities, detail (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Accrued Liabilities |  |
Interest on long-term debt | $ 2,193 | $ 1,627
Vessels' operating and voyage expenses | 1,568 | 1,784
Commissions | 139 | 76
Interest on derivatives and other finance expenses | 162 | 398
General and administrative expenses | 91 | 99
Total | $ 4,153 | $ 3,984

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