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Employee Benefit Plan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Contributions made to profit sharing plan	$ 0.3us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount	$ 0.3us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount	$ 0.3us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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