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Intangible Assets - Schedule of Amortizable Purchased Intangible Assets from 2010 Acquisition (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 42,520 | $ 42,520
Accumulated Amortization | (11,424) | (10,752)
Accumulated Impairment | (29,749) | (29,749)
Net | 1,347 | 2,019
Developed Technologies [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 26,000 | 26,000
Accumulated Amortization | (6,371) | (6,120)
Accumulated Impairment | (19,547) | (19,547)
Net | 82 | 333
Trade Name [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 12,800 | 12,800
Accumulated Amortization | (3,053) | (2,665)
Accumulated Impairment | (8,582) | (8,582)
Net | 1,165 | 1,553
Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 3,720 | 3,720
Accumulated Amortization | (2,000) | (1,967)
Accumulated Impairment | (1,620) | (1,620)
Net | $ 100 | $ 133

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