Bank Loan - Additional Information (Detail) (USD $)	9 Months Ended
	Jun. 30, 2013 Installment	Oct. 26, 2012
Debt Disclosure [Abstract]
Additional borrowings		$ 16,300,000
Total loan amount after amendment		18,400,000
Monthly payments	59 Months
Number of monthly installment payable	59
Principal amount plus interest at the bank's prime rate	153,333
Effective interest rate Current	3.25%
Spread on reference rate	0.75%
Effective interest rate on debt	4.00%
Final installment date	Oct. 26, 2017
Amortized loan costs	250,000
Amortized cost on straight-line basis in months	60 months
Unamortized loan cost	$ 210,000