Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues.
Revenues	$ 40,807,542	$ 34,729,021	$ 68,451,824	$ 75,754,493
Expenses
Voyage expenses	435,224	1,275,521	535,397	1,514,966
Vessel operating expenses	17,375,273	15,740,438	34,060,730	32,625,727
Depreciation and amortization	16,437,653	16,464,707	32,702,709	32,757,865
General and administrative expenses	7,462,726	5,421,145	15,866,012	13,956,054
Total expenses	41,710,876	38,901,811	83,164,848	80,854,612
Other income—related parties	584,632	638,070	1,229,149	1,271,953
Operating loss	(318,702)	(3,534,720)	(13,483,875)	(3,828,166)
Other income/(expenses)
Interest and finance costs	(10,152,672)	(8,602,430)	(20,526,953)	(16,080,164)
Interest income	451,923	28,226	912,896	44,042
Unrealized gain/(loss) on derivatives	1,051,460	652,160	2,759,076	(1,718,031)
Realized gain/(loss) on derivatives	830,991	(435,920)	1,613,556	(1,048,783)
Gain on early extinguishment of debt				4,117,364
Foreign currency loss, net	(40,120)	(22,452)	(48,378)	(91,368)
Total other income/(expenses), net	(7,858,418)	(8,380,416)	(15,289,803)	(14,776,940)
Net loss	$ (8,177,120)	$ (11,915,136)	$ (28,773,678)	$ (18,605,106)
Weighted average shares outstanding basic and diluted (in shares)	54,431,820	54,076,271	54,313,255	53,976,330
Loss per common share—basic and diluted (in dollars per share)	$ (0.15)	$ (0.22)	$ (0.53)	$ (0.34)
Net pool revenue - related party
Revenues.
Revenues	$ 32,027,042	$ 20,468,380	$ 48,133,443	$ 48,943,739
Time charter revenue
Revenues.
Revenues	8,640,000	12,507,394	20,107,881	25,072,049
Voyage charter revenue
Revenues.
Revenues		1,733,247		1,733,247
Other revenue, net
Revenues.
Revenues	$ 140,500	$ 20,000	$ 210,500	$ 5,458