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Share-Based Compensation - Total Share-Based Compensation Expense Included in Consolidated Statements of Comprehensive Income (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |
Total share-based compensation expense |  |  | $ 10,825
Cost of goods sold |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |
Total share-based compensation expense | $ 351 | $ 355 | 348
Selling, general and administrative |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |
Total share-based compensation expense | 13,272 | 9,443 | 8,139
Research and development |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |
Total share-based compensation expense | 3,564 | 2,705 | 2,338
Employee Stock Option |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost | $ 12,000 | $ 12,200 | $ 10,800

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- Definition Schedule Of Share Based Compensation Arrangements [Line Items] + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Amount of capitalized and expensed compensation cost from equity-based compensation arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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