Vessels Under Construction (Details)	6 Months Ended
	Sep. 30, 2015 USD ($)
Vessels under construction
Balance	$ 398,175,504
Balance	234,665,268
Vessels under commitment
Vessels under construction
Balance	398,175,504
Installment payments to shipyards	463,693,929
Other capitalized expenditures	13,949,868
Capitalized interest	3,630,321
Vessels delivered (transferred to Vessels)	(644,784,354)
Balance	234,665,268
LPG coolant cost included in Other capitalized expenditures	2,200,000
Vessels under commitment | Third party vendors
Vessels under construction
Other capitalized expenditures	$ 11,700,000