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Bank Loan - Additional Information (Detail) - US Bank National Association Loan [Member]	3 Months Ended		9 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Installment	Jun. 30, 2014 USD ($)	Nov. 01, 2013 USD ($)	Oct. 26, 2012 USD ($)
Debt Instrument [Line Items]
Long-term loan outstanding principal balance						$ 1,900,000
Additional borrowings						16,300,000
Outstanding bank loan					$ 30,000,000	$ 18,400,000
Monthly payments			P47M
Number of monthly installments payable | Installment			47
Required monthly loan principal repayment			$ 312,500
Debt instrument, stated interest rate	3.25%		3.25%
Spread on reference rate			0.75%
Effective interest rate on debt	4.00%		4.00%
Final installment date			Oct. 26, 2017
Increase in outstanding loan					$ 13,300,000
Amortized loan costs			$ 376,226
Amortized cost on straight-line basis in months			60 months
Amortization expenses	$ 21,624	$ 21,624	$ 64,871	$ 61,703
Unamortized loan cost	$ 201,822		$ 201,822

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