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Commitments and Contingencies - Additional Information (Detail) € in Thousands, £ in Thousands, $ in Millions | Jul. 20, 2016 patent | Sep. 08, 2014 complaint | May 16, 2014 patent | Mar. 31, 2017 EUR (€) ft² | Mar. 31, 2017 USD ($) ft² | Mar. 31, 2017 GBP (£) ft²
--- | --- | --- | --- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |  |  |  |
Annual base rent |  |  |  |  | $ 0.6 |
Tenant improvement allowances |  |  |  |  | 0.3 |
Unamortized lease incentives |  |  |  |  | 0.3 |
IDchecker |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Annual base rent | € |  |  |  | € 48 |  |
Other current liabilities |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Unamortized lease incentives |  |  |  |  | 0.1 |
Other non-current liabilities |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Unamortized lease incentives |  |  |  |  | $ 0.2 |
Building |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Amended office space subject to the lease (in square feet) | ft² |  |  |  | 28,354 | 28,354 | 28,354
Sales Office |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Annual base rent | £ |  |  |  |  |  | £ 65
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 |  |  |  |
Number of patents not found to be infringed upon (in patents) | patent | 4 |  |  |  |  |

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