Acquisitions - Additional Information (Details) - USD ($)		3 Months Ended			6 Months Ended
	Apr. 16, 2021	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Business Acquisition [Line Items]
Revenues			$ 15,919,000	$ 12,933,000	$ 27,300,000	$ 26,255,000
Cost of revenues			3,358,000	$ 1,269,000	4,903,000	$ 2,441,000
Avast PLC Family Safety Mobile Software Business [Member]
Business Acquisition [Line Items]
Date of acquisition agreement	Apr. 16, 2021
Goodwill expected tax deductible amount	$ 0
Revenues		$ 6,000,000.0
Cost of revenues		1,700,000
Avast PLC Family Safety Mobile Software Business [Member] | Other Accrued Liabilities [Member]
Business Acquisition [Line Items]
Contingent consideration		$ 1,100,000	$ 1,100,000		$ 1,100,000
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