Concentration of Risk and Segment Information (Details Textual)	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Customer Concentration Risk [Member]
Geographic Areas, Revenues from External Customers
Percentage Of Revenue From Major Customers Or Licensees	48.00%	49.00%	43.00%
Accounts Receivable, Net [Abstract]
Percentage of Accounts Receivable from Major Customers	68.00%	64.00%
Apple Inc. [Member]
Geographic Areas, Revenues from External Customers
Percentage Of Revenue From Major Customers Or Licensees	19.00%	20.00%	13.00%
Accounts Receivable, Net [Abstract]
Percentage of Accounts Receivable from Major Customers	34.00%	32.00%
Best Buy Co., Inc. [Member]
Accounts Receivable, Net [Abstract]
Percentage of Accounts Receivable from Major Customers	10.00%	11.00%