Net Income (Loss) Per Share - Antidilutive Securities (Details) - shares shares in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 30, 2017 |
Dec. 31, 2016 |
Dec. 26, 2015 |
|
| Stock options | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Antidilutive securities (shares) | 1,365 | 4,312 | 3,482 |
| Restricted Stock Units (RSUs) | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Antidilutive securities (shares) | 140 | 1,780 | 1,306 |
| Series A Redeemable Convertible Preferred Stock | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Antidilutive securities (shares) | 4,787 | 4,539 | 0 |