Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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+ Details

The Company and Basis of Presentation (Details) (USD $)	9 Months Ended
The Company and Basis of Presentation (Details) (USD $)	Sep. 29, 2013	Dec. 30, 2012	Jul. 01, 2012	Jan. 01, 2012
Liquidity [Line Items]
Cash and cash equivalents	$ 14,871,000	$ 22,578,000	$ 24,948,000	$ 20,203,000
Percentage of revenue from major customer	49.00%
Revolving Credit Facility [Member] \| Silicon Valley Bank [Member]
Liquidity [Line Items]
Line of credit facility, additional borrowing capacity	$ 5,000,000