Segment, Concentration and Geographical Information - Wireless Revenues by Product Line (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenue from External Customer [Line Items]
Total revenues	$ 20,555	$ 40,862
Wireless
Revenue from External Customer [Line Items]
Total revenues	20,555	40,862
Wireless | Family Safety
Revenue from External Customer [Line Items]
Total revenues	16,430	34,513
Wireless | CommSuite
Revenue from External Customer [Line Items]
Total revenues	2,956	2,834
Wireless | ViewSpot
Revenue from External Customer [Line Items]
Total revenues	$ 1,169	$ 3,515