Financial Instruments and Fair Value Disclosures (Details) - Interest rate swaps	Jun. 30, 2015 USD ($) item	Mar. 31, 2015 USD ($)
Derivative asset and liability
Number of interest rate swaps | item	5
Derivatives not designated as hedging instruments | Long-term liabilities-Derivatives instruments
Derivative asset and liability
Liability derivatives	$ 11,343,576	$ 12,730,462