Cash, Cash Equivalents and Short-term Investments - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 28, 2013
Investment [Line Items]
Variable rate demand notes maturity year	2037
Net loss recognized	$ 300,000
Contracts expiration date	Aug. 31, 2013
Variable Rate Demand Notes [Member]
Investment [Line Items]
Securities amortized cost, Due in one year or less	1,200,000
Securities fair value, Due in one year or less	$ 1,200,000