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v3.19.1

Long-Term Payment Obligation - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2012
Related Party Transaction [Line Items] |  |  |
Interest accreted on long-term payment obligation | $ 44,000 | $ 64,000 |
Secure Keyboards Ltd |  |  |
Related Party Transaction [Line Items] |  |  |
Percentage of ownership by a related party following acquisition | 24.50% |  | 30.00%
Secure Networks Ltd |  |  |
Related Party Transaction [Line Items] |  |  |
Percentage of ownership by a related party following acquisition |  |  | 9.00%
Settlement Agreement | Maximum |  |  |
Related Party Transaction [Line Items] |  |  |
Installment payment, contractual payment year | 2020 |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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