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Commitments and Contingencies - Additional Information (Detail) £ in Thousands, € in Millions | May 03, 2018 USD ($) | Sep. 08, 2014 complaint | May 16, 2014 patent | Jun. 30, 2018 EUR (€) ft² | Jun. 30, 2018 USD ($) ft² | Jun. 30, 2018 GBP (£) ft²
--- | --- | --- | --- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |  |  |  |
Annual base rent |  |  |  |  | $ 1,000,000 |
Tenant improvement allowances |  |  |  |  | 1,000,000 |
Unamortized lease incentives |  |  |  |  | 800,000 |
Revolving Credit Facility | Line of Credit |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | $ 10,000,000 |  |  |  |  |
Interest rate floor | 4.50% |  |  |  |  |
Minimum unrestricted cash and unused borrowing capacity | $ 15,000,000 |  |  |  |  |
Adjusted quick ratio requirement | 1.75 |  |  |  |  |
Borrowings outstanding |  |  |  |  | 0 |
Revolving Credit Facility | Prime Rate | Line of Credit |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 0.25% |  |  |  |  |
A2iA Group II, S.A.S. | France |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Annual base rent |  |  |  | € 0.4 | 400,000 |
A2iA Group II, S.A.S. | United States |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Annual base rent |  |  |  |  | 300,000 |
IDchecker |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Annual base rent |  |  |  | € 0.2 | 200,000 |
Other current liabilities |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Unamortized lease incentives |  |  |  |  | 100,000 |
Other non-current liabilities |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Unamortized lease incentives |  |  |  |  | $ 700,000 |
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] |  |  |  |  |  |
Annual base rent |  |  |  |  | $ 83,000 | £ 63
RMII Patent Infringement Case |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of patents allegedly infringed (in patents) | patent |  |  | 4 |  |  |
Number of additional claims filed (in complaints) | complaint |  | 3 |  |  |  |

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