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Discontinued Operations - Schedule of Details on Income Statement Caption on TSA Billing (Detail) (Aurora [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Total TSA billing to Aurora | $ 977
Product cost of revenue [Member] |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Total TSA billing to Aurora | 577
Research and development expense [Member] |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Total TSA billing to Aurora | 21
Selling, general and administrative expenses [Member] |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Total TSA billing to Aurora | $ 379

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