Fair Value Disclosures - Assets and liabilities recorded at fair value on recurring basis (Details) - USD ($)	Dec. 31, 2015	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements - Assets	$ 6,487
Interest rate swap agreements - liability	59,092	$ 180,775
Recurring Basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements - Assets	0
Interest rate swap agreements - liability	0
Recurring Basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements - Assets	6,487
Interest rate swap agreements - liability	(59,092)	$ (180,775)
Recurring Basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements - Assets	0
Interest rate swap agreements - liability	0
Recurring Basis | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements - Assets	6,487
Interest rate swap agreements - liability	$ (59,092)	$ (180,775)