Interest Rate Swap Agreements - Summary of locations and amounts of (gains) losses in income (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Periodic change in fair value of interest rate swap agreements	$ (250,798)	$ 144,999	$ (128,170)	$ 105,878
Periodic settlement differentials included in interest expense	89,360	98,517	278,838	297,355
Total	$ (161,438)	$ 243,516	$ 150,668	$ 403,233