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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
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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 |

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