Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Income Taxes (Textual) [Abstract]
Excess benefits due to stock option exercise	$ 100,000
Change in amount of operating loss carryforwards valuation allowance	1,400,000	2,100,000
Undistributed earnings from non-U.S. operations	2,900,000
Research tax credit		600,000
Maximum amount company recognize from unrecognized tax benefit	4,436,000	3,464,000	3,599,000	3,370,000
Unrecognized tax benefits that would impact effective tax rate if recognized	1,200,000
Additional Paid-in Capital [Member]
Income Taxes (Textual) [Abstract]
State research and experimental tax credit carryforward	200,000
California Tax Authority [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	27,500,000
California Tax Authority [Member] | Additional Paid-in Capital [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	2,700,000
Foreign Tax Authority [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	37,600,000
Foreign Tax Authority [Member] | Additional Paid-in Capital [Member]
Income Taxes (Textual) [Abstract]
Operating loss carryforwards	1,800,000
Federal [Member]
Income Taxes (Textual) [Abstract]
State research and experimental tax credit carryforward	5,500,000
State [Member]
Income Taxes (Textual) [Abstract]
State research and experimental tax credit carryforward	$ 5,000,000