Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	Mar. 30, 2013	Dec. 29, 2012
Equity [Abstract]
Net of allowance for doubtful accounts	$ 600,000	$ 300,000
Deferred revenue	6,700,000	3,600,000
Deferred profit	5,561,000	2,139,000	[1]
Accumulated other comprehensive income (loss)	$ (2,163,000)	$ 1,783,000	[1]

[1] Derived from December 29, 2012 audited financial statements