Stockholders’ Equity (Details 4) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Dec. 29, 2017 USD ($) $ / shares shares
Schedule of Employee Service Share-based Compensation [Line Items]
Options, Outstanding at December 30, 2016 \| shares	3,502
Options, Granted, Shares \| shares	956
Options, Exercised, Shares \| shares	(557)
Options, Forfeited or expired, Shares \| shares	(176)
Options,Outstanding at December 29, 2017 \| shares	3,725
Options, Exercisable at December 29, 2017 \| shares	2,577
Weighted Average Exercise Price, Options Outstanding at December 30, 2016 \| $ / shares	$ 8.28
Weighted Average Exercise Price, Options, Granted \| $ / shares	10.19
Weighted Average Exercise Price,Options, Exercised \| $ / shares	7.12
Weighted Average Exercise Price, Options, Forfeited and Expired \| $ / shares	11.62
Weighted Average Exercise Price, Options Outstanding at December 29, 2017 \| $ / shares	8.78
Weighted Average Exercise Price, Options Exercisable at December 29, 2017 \| $ / shares	$ 8.38
Weighted Average Remaining Contractual Term, Options, Outstanding at December 29, 2017	6 years 11 months 16 days
Weighted Average Remaining Contractual Term, Options, Exercisable at December 29, 2017	6 years
Aggregate Intrinsic Value, Options, Outstanding at December 29, 2017 \| $	$ 25,069
Aggregate Intrinsic Value, Options, Outstanding at December 29, 2017 \| $	$ 18,395

Line items represent the schedule of employee service share-based compensation.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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