Revenues (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 55,113,295		$ 123,565,119
Net pool revenue - related party
Revenues	46,683,295		94,816,738
Time charter revenue
Revenues	8,370,000		28,477,881
Other revenues, net
Revenues	$ 60,000		$ 270,500
Revenue Guidance in Effect before Topic 606
Revenues		$ 44,545,589		$ 120,300,082
Revenue Guidance in Effect before Topic 606 | Net pool revenue - related party
Revenues		31,610,427		80,554,166
Revenue Guidance in Effect before Topic 606 | Time charter revenue
Revenues		12,498,849		37,570,898
Revenue Guidance in Effect before Topic 606 | Voyage charter revenue
Revenues		335,244		2,068,491
Revenue Guidance in Effect before Topic 606 | Other revenues, net
Revenues		$ 101,069		$ 106,527