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Benefit Plan (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Jan. 02, 2015 | Dec. 27, 2013 | Dec. 28, 2012
Benefit Plan [Abstract] |  |  |
Percentage of pre-tax annual compensation contributed to the plan | 15.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent |  |
Percentage of matching contributions of employee | 25.00%us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage | 25.00%us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage | 25.00%us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage
Percentage of matching contributions of employee's gross salary | 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent | 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent | 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Company's matching contributions | $ 0.3 us-gaap_DefinedBenefitPlanContributionsByEmployer | $ 0.3 us-gaap_DefinedBenefitPlanContributionsByEmployer | $ 0.3 us-gaap_DefinedBenefitPlanContributionsByEmployer

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- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
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- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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Period Type: | duration

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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Percentage of employer's matching contributions to a defined contribution plan that vests in a given year. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration