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Intangible Assets - Schedule of Amortizable Purchased Intangible Assets from Acquisition (Detail) (USD $) | Sep. 30, 2013 | Dec. 31, 2012
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Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 42,520,000 | $ 42,520,000
Accumulated Amortization | (10,528,000) | (9,856,000)
Accumulated Impairment | (29,749,000) | (29,749,000)
Net | 2,243,000 | 2,915,000
Developed technologies [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 26,000,000 | 26,000,000
Accumulated Amortization | (6,036,000) | (5,786,000)
Accumulated Impairment | (19,547,000) | (19,547,000)
Net | 417,000 | 667,000
Trade name [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 12,800,000 | 12,800,000
Accumulated Amortization | (2,536,000) | (2,147,000)
Accumulated Impairment | (8,582,000) | (8,582,000)
Net | 1,682,000 | 2,071,000
Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 3,720,000 | 3,720,000
Accumulated Amortization | (1,956,000) | (1,923,000)
Accumulated Impairment | (1,620,000) | (1,620,000)
Net | $ 144,000 | $ 177,000

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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