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Segment Information and Concentrations of Risk - Schedule of Net Revenues, Operating Income (Loss) and Identifiable Assets of Segments (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Net revenues by reportable segment:                      
Net revenues $ 65,335 $ 92,673 $ 91,124 $ 85,921 $ 70,675 $ 71,017 $ 102,446 $ 100,150 $ 335,053 $ 344,288 $ 402,862
Operating income (loss):                      
Operating loss                 (43,221) (88,743) (33,727)
Identifiable assets by reportable segment:                      
Identifiable assets 111,465       161,531       111,465 161,531  
Mobile Computing Products [Member]
                      
Net revenues by reportable segment:                      
Net revenues                 297,499 312,508 358,106
Operating income (loss):                      
Operating loss                 (27,939) (22,924) (13,764)
Identifiable assets by reportable segment:                      
Identifiable assets 96,516       141,045       96,516 141,045  
M2M Products and Solutions [Member]
                      
Net revenues by reportable segment:                      
Net revenues                 37,554 31,780 44,756
Operating income (loss):                      
Operating loss                 (15,282) (65,819) (19,963)
Identifiable assets by reportable segment:                      
Identifiable assets $ 14,949       $ 20,486       $ 14,949 $ 20,486