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Net Income (loss) per Common Share - Additional Information (Detail) - shares shares in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017
Net Income Loss Per Common Share |  |  |
Exercise of stock options | 0.1 | 0.1 | 0.1

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- Definition Net Income (Loss) Per Common Share [Line Items] + References No definition available. + Details
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- Definition Stock Issued During Period Shares Sale Of Stock And Exercise Of Stock Options + References No definition available. + Details
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