Vessels - Vessel and Vessel Improvements (Details)	6 Months Ended
	Jun. 30, 2019 USD ($)
Movement in Property, Plant and Equipment [Roll Forward]
Sale of Vessels	$ (8,732,865)
Vessels and Vessel Improvements
Movement in Property, Plant and Equipment [Roll Forward]
Vessels and vessel improvements, beginning balance	682,944,936
Advance paid for purchase of Cape Town Eagle at December 31, 2018	2,040,000
Purchase of Vessels and Vessel Improvements	18,477,740
Vessel depreciation expense	(16,308,674)
Vessels and vessel improvements, ending balance	$ 678,421,137