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Stockholders' Equity - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended
Jun. 17, 2015
Jan. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Sep. 30, 2015
Feb. 19, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense     $ 8,579,699      
Weighted average period for unrecognized compensation expense expected to be recognized     2 years 10 months 2 days      
Purchase of common stock     3,621,853 3,523,065 3,647,705  
Recognized compensation expense     $ 988,857 $ 814,060    
Unrecognized compensation expense     2,742,665 3,891,848    
Total intrinsic value of options exercised     $ 104,842 $ 4,083    
Weighted average fair value of options granted     $ 4.31      
Weighted-average remaining contractual term     6 years 10 months 24 days 7 years 2 months 12 days    
Weighted-average exercise price, outstanding shares     $ 3.73 $ 3.52 $ 3.70  
Aggregate intrinsic value, outstanding shares     $ 4,688,679 $ 3,138,317    
Percentage of earnout shares vest and eligible for resale     12.50%      
Percentage of remaining earnout shares vest and eligible for resale     87.50%      
Earnout Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Recognized compensation expense     $ 84,217      
Vesting period of shares received     27 months      
Common stock trading period     10 days      
Earnout Shares [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Delivery period of written statement of calculation of revenue and net income for earnout period     75 days      
ID Checker [Member] | Subsequent Event [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Business combination, paid earnout shares issued   137,306        
ID Checker [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Business combination, earnout shares $ 1,000,000   $ 1,000,000      
ID Checker [Member] | Closing Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Recognized compensation expense     302,539      
Unrecognized compensation expense     $ 2,074,078      
Common stock issued during acquisition, share 712,790          
Vesting period of shares received 27 months          
2012 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock reserved for issuance           4,000,000
Purchase of common stock     2,360,520      
Number of common stock reserved for future grants     496,356      
2010 Stock Option Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Purchase of common stock     1,261,333      
Director Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of common stock reserved for future grants     130,171      
Scenario, Previously Reported [Member] | 2012 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock reserved for issuance           2,000,000
Restricted Stock Units (RSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average period for unrecognized compensation expense expected to be recognized     3 years 2 years 9 months 18 days    
Common stock reserved for issuance     1,000,000      
Options outstanding     1,769,588   802,917  
Recognized compensation expense     $ 500,194 $ 339,970    
Restricted Stock Units (RSUs) [Member] | 2012 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options outstanding     1,004,588      
Restricted Stock Units (RSUs) [Member] | Director Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Purchase of common stock     764,998      
Stock options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average period for unrecognized compensation expense expected to be recognized     2 years 9 months 18 days 2 years 10 months 24 days    
Recognized compensation expense     $ 488,663 $ 474,091    
Restricted stock units [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense     $ 5,837,034 $ 2,958,057