Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ 3,423,000	$ 2,361,000	$ 2,995,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%
Tax benefit for stock option plans	3,948,000	2,378,000	3,972,000
Unrecognized Tax Benefits	908,000	388,000	376,000
Deferred Tax Liabilities, Undistributed Foreign Earnings	2,174,000
Unrecognized deferred tax liability	$ 108,000