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COMMITMENTS AND CONTINGENCIES - ADDITIONAL INFORMATION (Detail) € in Thousands, £ in Thousands, $ in Thousands |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 20, 2016 patent | Sep. 08, 2014 complaint | May 16, 2014 patent | Sep. 30, 2017 USD ($) ft² | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2017 GBP (£) ft² | Sep. 30, 2017 EUR (€) ft²
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Company contribution, percent of designated deferral of eligible compensation |  |  |  | 25.00% |  |  |  |
Company contribution, percent of employee compensation eligible for company match |  |  |  | 6.00% |  |  |  |
Employer contribution amount |  |  |  | $ 121 | $ 91 | $ 42 |  |
Commencement date of term of lease |  |  |  | Oct. 01, 2016 |  |  |  |
Expiration date of term of lease |  |  |  | Apr. 30, 2020 |  |  |  |
Annual base rent |  |  |  | $ 600 |  |  |  |
Tenant improvement allowances |  |  |  | $ 300 |  |  |  |
Previous facility lease termination date |  |  |  | Oct. 16, 2016 |  |  |  |
Unamortized lease incentives |  |  |  | $ 49 |  |  |  |
Rent expense for the Company's operating leases |  |  |  | $ 600 | $ 300 | $ 400 |  |
IDchecker |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Expiration date of term of lease |  |  |  | May 31, 2020 |  |  |  |
Annual base rent | € |  |  |  |  |  |  |  | € 48
Building |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Amended office space subject to the lease (in square feet) | ft² |  |  |  | 28,791 |  |  | 28,791 | 28,791
Sales office |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Expiration date of term of lease |  |  |  | May 31, 2018 |  |  |  |
Annual base rent | £ |  |  |  |  |  |  | £ 77 |
Rothschild Mobile Imaging Innovations, Inc. Patent Infringement |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of patents infringed upon | patent |  |  | 4 |  |  |  |  |
Number of new claims filed | complaint |  | 3 |  |  |  |  |  |
Number of patents found not infringed upon | patent | 4 |  |  |  |  |  |  |

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