Recent Accounting Pronouncements - Revenue Earned (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues, net	$ 68,182,301	$ 74,110,376	$ 199,952,404	$ 220,891,288
Time charters
Disaggregation of Revenue [Line Items]
Revenues, net	25,279,434	37,086,461	73,798,878	96,728,727
Voyage charters
Disaggregation of Revenue [Line Items]
Revenues, net	$ 42,902,867	$ 37,023,915	$ 126,153,526	$ 124,162,561