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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

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