Deferred Drydock Costs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Changes in Deferred Drydock Costs [Roll Forward]
Beginning Balance	$ 12,186,356	$ 9,749,751
Drydocking expenditures	11,903,474	8,323,191	$ 2,579,111
Drydock amortization	(6,227,851)	(5,353,102)	(4,336,669)
Write-off due to sale of vessels *	(366,709)	(533,484)
Ending Balance	$ 17,495,270	$ 12,186,356	$ 9,749,751