Commitments and Contingencies (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Leases
Operating lease rent expense	$ 108,358	$ 90,992	$ 214,550	$ 206,022
Commitments under Operating Leases
Less than one year	247,648		247,648
One to three years	95,284		95,284
Total	342,932		342,932
Fixed time charter
Fixed Time Charter Contracts
Less than one year	43,783,113		43,783,113
One to three years	40,951,227		40,951,227
Three to five years	1,058,252		1,058,252
Total	$ 85,792,592		$ 85,792,592