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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 | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Net revenues by reportable segment: |  |  |  |  |
Net revenues | $ 91,124 | $ 102,446 | $ 177,045 | $ 202,596 |
Operating loss by reportable segment: |  |  |  |  |
Operating loss | (7,744) | (4,445) | (16,929) | (42,272) |
Identifiable assets by reportable segment: |  |  |  |  |
Identifiable assets | 150,396 |  | 150,396 |  | 161,531
Operating Segments [Member] | Mobile Computing Products [Member] |  |  |  |  |
Net revenues by reportable segment: |  |  |  |  |
Net revenues | 80,823 | 92,552 | 156,443 | 183,431 |
Operating loss by reportable segment: |  |  |  |  |
Operating loss | (3,348) | (718) | (8,848) | (4,188) |
Identifiable assets by reportable segment: |  |  |  |  |
Identifiable assets | 131,536 |  | 131,536 |  | 141,045
Operating Segments [Member] | M2M Products and Solutions [Member] |  |  |  |  |
Net revenues by reportable segment: |  |  |  |  |
Net revenues | 10,301 | 9,894 | 20,602 | 19,165 |
Operating loss by reportable segment: |  |  |  |  |
Operating loss | (4,396) | (3,727) | (8,081) | (38,084) |
Identifiable assets by reportable segment: |  |  |  |  |
Identifiable assets | $ 18,860 |  | $ 18,860 |  | $ 20,486

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