Stockholders' Equity (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Jan. 02, 2015
Schedule of Employee Service Share-based Compensation [Line Items]
Options,Outstanding as of January 3, 2014	3,299
Options, Granted, Shares	617
Options, Exercised, Shares	(584)
Options, Forfeited or expired, Shares	(157)
Options,Outstanding as of January 2, 2015	3,175
Options,Exercisable as of January 2, 2015	2,085
Weighted Average Exercise Price, Options Outstanding at January 3, 2014	$ 6.17
Weighted Average Exercise Price, Options, Granted	$ 15.43
Weighted Average Exercise Price,Options, Exercised	$ 6.09
Weighted Average Exercise Price, Options, Forfeited and Expired	$ 11.92
Weighted Average Exercise Price, Options Outstanding at January 2, 2015	$ 7.79
Weighted Average Exercise Price, Exercisable at January 2, 2015	$ 5.71
Weighted Average Remaining Contractual Term, Options, Outstanding at January 2, 2015	6 years 2 months 8 days
Weighted Average Remaining Contractual Term, Options, Exercisable at January 2, 2015	4 years 10 months 28 days
Aggregate Intrinsic Value, Options, Outstanding at January 2, 2015	$ 8,692
Aggregate Intrinsic Value, Options, Exercisable at January 2, 2015	$ 7,583

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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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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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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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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 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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