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Commitments and Contingencies - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2015 USD ($) ft² | Sep. 30, 2014 USD ($) | Sep. 30, 2013 USD ($) | Sep. 30, 2015 EUR (€) ft²
Loss Contingencies [Line Items] |  |  |  |
Expiration date of term of lease | Jun. 30, 2019 |  |  |
Annual base rent | $ 471,000 |  |  |
Increased percentage of Company's annual base rent | 3.00% |  |  | 3.00%
Tenant improvement allowances | $ 675,690 |  |  |
Unamortized lease incentives | 393,392 |  |  |
Rent expense for the Company's operating leases | $ 381,957 | $ 368,835 | $ 379,529 |
Building [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Amended office space subject to the lease | ft² | 22,523 |  |  | 22,523
Other current liabilities [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Unamortized lease incentives | $ 104,905 |  |  |
Other non-current liabilities [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Unamortized lease incentives | $ 288,487 |  |  |
ID Checker [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Expiration date of term of lease | May 31, 2020 |  |  |
Annual base rent | € |  |  |  | € 48,000
Standby letter of credit [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Standby letter of credit to the landlord | $ 210,000 |  |  |
Defined contribution 401 K Plan [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Employer contribution amount | $ 42,114 | $ 0 | $ 0 |

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