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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 |  |

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