Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 03, 2014	Dec. 28, 2012	Dec. 30, 2011
Income Tax Disclosure [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ 6,007,000	$ 3,423,000	$ 2,361,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Tax Benefit For Stock Option Plans	4,267,000	3,948,000	2,378,000
Unrecognized Tax Benefits, Beginning Balance	1,147,000	908,000	388,000
Deferred Tax Liabilities, Undistributed Foreign Earnings	2,379,000
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	$ 118,000