Business Segment, Geographic And Concentration Risk Information (Significant Customers) (Details) - customer	12 Months Ended
	Jan. 01, 2016	Jan. 02, 2015	Jan. 03, 2014
Revenue, Major Customer [Line Items]
Number of Customers	4
Entity-Wide Revenue, Major Customer, Percentage	52.00%	54.00%	56.00%
Entity Wide Accounts Receivable, Major Customer, Percentage	44.00%	47.00%
Customer A [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	18.00%	18.00%	16.00%
Entity Wide Accounts Receivable, Major Customer, Percentage	23.00%	23.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	17.00%	18.00%	20.00%
Entity Wide Accounts Receivable, Major Customer, Percentage	8.00%	4.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	12.00%	12.00%	13.00%
Entity Wide Accounts Receivable, Major Customer, Percentage	6.00%	8.00%
Customer D [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	5.00%	6.00%	7.00%
Entity Wide Accounts Receivable, Major Customer, Percentage	7.00%	12.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Revenue, Major Customer [Line Items]
Number of Customers	4	4	4
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Revenue, Major Customer [Line Items]
Number of Customers	4	4