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Segment Information and Concentrations of Risk - Schedule of Net Revenues, Operating Loss and Identifiable Assets of Segments (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Net revenues by reportable segment:          
Net revenues $ 92,673 $ 71,017 $ 269,718 $ 273,613  
Operating loss by reportable segment:          
Operating loss (4,864) (31,853) (21,793) (74,125)  
Identifiable assets by reportable segment:          
Identifiable assets 144,493   144,493   161,531
Operating Segments [Member] | Mobile Computing Products [Member]
          
Net revenues by reportable segment:          
Net revenues 84,067 65,189 240,510 248,620  
Operating loss by reportable segment:          
Operating loss (953) (7,513) (9,801) (11,701)  
Identifiable assets by reportable segment:          
Identifiable assets 128,111   128,111   141,045
Operating Segments [Member] | M2M Products and Solutions [Member]
          
Net revenues by reportable segment:          
Net revenues 8,606 5,828 29,208 24,993  
Operating loss by reportable segment:          
Operating loss (3,911) (24,340) (11,992) (62,424)  
Identifiable assets by reportable segment:          
Identifiable assets $ 16,382   $ 16,382   $ 20,486