Recent Accounting Pronouncements - Revenue Earned (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues, net	$ 57,391,784	$ 69,391,315	$ 131,770,103	$ 146,780,912
Time charters
Disaggregation of Revenue [Line Items]
Revenues, net	20,506,088	32,138,075	48,336,563	59,642,266
Voyage charters
Disaggregation of Revenue [Line Items]
Revenues, net	$ 36,885,696	$ 37,253,240	$ 83,433,540	$ 87,138,646