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Subsequent Event - Additional Information (Detail) - USD ($)
1 Months Ended
Oct. 31, 2015
Oct. 30, 2015
May. 10, 2012
Subsequent Event [Line Items]      
Additional financing     $ 8,000,000
Loan Agreement with Private Lender [Member] | Subsequent Event [Member]      
Subsequent Event [Line Items]      
Loan amount borrowed   $ 1,000,000  
Unused borrowing capacity $ 1,000,000    
Interest rate, stated percentage 12.00%    
Default interest rate 14.00%    
Maturity date Dec. 18, 2015    
Loan Agreement with Private Lender [Member] | Subsequent Event [Member] | Maximum [Member]      
Subsequent Event [Line Items]      
Additional financing $ 2,000,000