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Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid Expenses and Other Current Assets

    December 31, 2018     December 31, 2017
Insurance and other claims $ 1,761   $ 348
Advances to suppliers and other assets   2,128     68
Prepaid vessel expenditure   840     327
Prepaid insurances   787     418
Other   698     215
Total $ 6,214   $ 1,376