Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues, net	$ 74,378,319	$ 77,389,597
Voyage expenses	26,564,358	25,906,140
Vessel expenses	23,700,109	20,093,706
Charter hire expenses	6,040,939	11,491,906
Depreciation and amortization	12,466,483	9,407,108
General and administrative expenses	7,961,072	8,409,919
Gain on sale of vessels	0	(4,106,547)
Total operating expenses	76,732,961	71,202,232
Operating (loss)/income	(2,354,642)	6,187,365
Interest expense	9,191,815	6,762,003
Interest income	(156,857)	(434,318)
Loss on debt extinguishment	0	2,268,452
Realized and unrealized (gain)/loss on derivative instruments, net	(7,861,841)	(2,438,255)
Total other expense, net	1,173,117	6,157,882
Net (loss)/income	$ (3,527,759)	$ 29,483
Weighted average shares outstanding:
Basic (in shares)	71,869,152	71,283,301
Diluted (in shares)	71,869,152	72,070,868
Per share amounts:
Basic net (loss)/income (in usd per share)	$ (0.05)	$ 0
Diluted net (loss)/income (in usd per share)	$ (0.05)	$ 0