Segment, Customer Concentration and Geographical Information - Company's Customers that Represent 10% or More of Company's Net Revenues (Detail) - Revenues [Member] - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Wireless [Member] | Sprint and Affiliates [Member]
Revenue from External Customer [Line Items]
Customer concentrating on 10% or more of net revenue	64.50%	72.80%	64.70%	67.50%
Graphics [Member] | FastSpring [Member]
Revenue from External Customer [Line Items]
Customer concentrating on 10% or more of net revenue	13.70%	11.20%	12.80%	10.40%