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Acquisitions - Summary of Consideration Paid for Acquisitions (Detail) - USD ($) $ in Thousands | Apr. 16, 2021 | Feb. 12, 2020
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Avast PLC Family Safety Mobile Software Business [Member] |  |
Business Acquisition [Line Items] |  |
Fair value of assets acquired | $ 74,818 |
Fair value of liabilities assumed | 2,085 |
Total purchase price | 72,733 |
Components of purchase price: |  |
Cash | 63,216 |
Common stock | 8,381 |
Contingent consideration | 1,136 |
Total purchase price | $ 72,733 |
Circle [Member] |  |
Business Acquisition [Line Items] |  |
Fair value of assets acquired |  | $ 14,966
Fair value of liabilities assumed |  | 1,466
Total purchase price |  | 13,500
Components of purchase price: |  |
Cash |  | 13,500
Total purchase price |  | $ 13,500

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