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Business Combination - Additional Information (Detail) - USD ($)
 12 Months Ended
Jun. 17, 2015
Sep. 30, 2016
Sep. 30, 2015
Business Acquisition [Line Items]      
Common stock, par value   $ 0.001 $ 0.001
Goodwill   $ 2,863,000 $ 2,873,000
Maximum [Member]      
Business Acquisition [Line Items]      
Business combination, escrow fund period 24 months    
IDchecker [Member]      
Business Acquisition [Line Items]      
Acquisition date Jun. 17, 2015    
Total consideration paid $ 5,900,000    
Payments to acquire businesses, gross 5,600,000    
Common stock issued during acquisition, value $ 2,700,000    
Common stock, par value $ 0.001    
Business combination consideration transfer, promissory notes $ 300,000    
Cash payment to escrow fund related to business acquisition $ 1,800,000    
Business combination, percentage of closing shares in escrow fund 20.00%    
Goodwill $ 2,863,000    
IDchecker [Member] | Closing Shares [Member]      
Business Acquisition [Line Items]      
Common stock issued during acquisition, share 712,790    
IDchecker [Member] | Maximum [Member]      
Business Acquisition [Line Items]      
Business combination, earnout shares $ 2,000,000 $ 2,000,000