Cash and Investments (Details Textual)	6 Months Ended	12 Months Ended
	Jun. 28, 2014	Dec. 28, 2013
Investments, Debt and Equity Securities [Abstract]
Maximum maturity period of Available-for-sale marketable securities, classified as cash equivalents	90 days
Minimum maturity period of Available-for-sale marketable securities, classified as marketable securities	90 days
Maximum period of available for sale securities debt maturities	2 years	2 years