Acquisitions - Summary of Allocation of Purchase Price (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Apr. 16, 2021	Dec. 31, 2020	Feb. 12, 2020
Business Acquisition [Line Items]
Goodwill	$ 35,041		$ 12,266
Avast PLC Family Safety Mobile Software Business [Member]
Business Acquisition [Line Items]
Cash		$ 6,351
Accounts receivable		6,225
Prepaid expenses		513
Fixed assets		921
Intangible assets		38,033
Goodwill		22,775
Total assets		74,818
Accounts payable		392
Accrued payroll and benefits		1,662
Accrued expenses		31
Total liabilities		2,085
Total purchase price		$ 72,733
Circle [Member]
Business Acquisition [Line Items]
Intangible assets				$ 10,483
Goodwill				4,469
Total assets				14,966
Accounts payable				176
Total liabilities				1,466
Total purchase price				13,500
Inventory, net				14
Deferred revenue				$ 1,290