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Acquisitions - Additional Information (Detail) |  |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 16, 2021 USD ($) | Feb. 12, 2020 Customer | Dec. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Revenues |  |  |  | $ 58,422,000 | $ 51,300,000
Cost of revenues |  |  |  | $ 12,698,000 | $ 5,190,000
Avast PLC Family Safety Mobile Software Business [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Date of acquisition agreement | Apr. 16, 2021 |  |  |  |
Revenues |  |  | $ 19,700,000 |  |
Cost of revenues |  |  | $ 6,200,000 |  |
Avast PLC Family Safety Mobile Software Business [Member] | Maximum [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Earn-out provision for additional future payments | $ 14,000,000.0 |  |  |  |
Avast PLC Family Safety Mobile Software Business [Member] | Other Accrued Liabilities [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Contingent consideration | 13,700,000 |  |  |  |
Avast PLC Family Safety Mobile Software Business [Member] | Operating Expense [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Earn-out provision for additional future payments | 12,900,000 |  |  |  |
Avast PLC Family Safety Mobile Software Business [Member] | Purchase Price Allocation [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Earn-out provision for additional future payments | $ 1,100,000 |  |  |  |
Circle [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of customer contracts | Customer |  | 2 |  |  |

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