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Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) - USD ($) $ in Thousands | Jun. 28, 2019 | Dec. 31, 2018
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Acquired Finite-Lived Intangible Assets [Line Items] |  |
2019 (remaining six months) | $ 4,166 |
2020 | 3,974 |
2021 | 500 |
Total future amortization expense | 8,640 | $ 12,817
Cost of Revenue [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
2019 (remaining six months) | 2,590 |
2020 | 951 |
2021 | 0 |
Total future amortization expense | 3,541 |
Operating Expense [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
2019 (remaining six months) | 1,576 |
2020 | 3,023 |
2021 | 500 |
Total future amortization expense | $ 5,099 |

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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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