Derivative Instruments and Fair Value Measurements - Unrealized Gain (Loss) on Derivative Instruments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on derivative instruments, net	$ (18,098)	$ (301,058)	$ (1,530,875)	$ 2,203,899
Forward freight agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on derivative instruments, net	(57,765)	115,675	60,405	233,130
Fuel swap contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on derivative instruments, net	19,924	(416,733)	(1,167,192)	1,970,769
Interest rate cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on derivative instruments, net	$ 19,743	$ 0	$ (424,088)	$ 0