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Bank Loan - Additional Information (Detail) (USD $)
0 Months Ended 1 Months Ended 12 Months Ended
Jun. 30, 2013
Oct. 26, 2012
Sep. 30, 2013
Installment
Sep. 30, 2012
Debt Instrument [Line Items]        
Additional borrowings   $ 16,300,000    
Long-term loan outstanding principal balance   1,900,000 16,866,667 1,900,000
Total loan amount after amendment   18,400,000    
Monthly payments     59 Months  
Number of monthly installment payable     59  
Required monthly loan principal repayment     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   250,000  
Amortized cost on straight-line basis in months 60 months   60 months  
Unamortized loan cost     200,000  
Adjustment made to loan for loan modification or exchange   0    
Amortization expenses     44,956 6,295
Notes [Member]
       
Debt Instrument [Line Items]        
Long-term loan outstanding principal balance     $ 30,000,000