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Basis of Presentation (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Advance hire $ 4,890,377 $ 2,232,444
Prepaid expenses 1,440,209 1,844,522
Derivative Asset 2,547,092 259,126
Other current assets 1,053,975 2,105,491
Advance hire, prepaid expenses and other current assets $ 9,931,653 $ 6,441,583