Business Segment, Geographic And Concentration Risk Information (Significant Customers) (Details) - customer	12 Months Ended
	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Revenue, Major Customer [Line Items]
Number of Customers	4
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Number of Customers	4	4	4
Entity-Wide Revenue, Major Customer, Percentage	56.00%	52.00%	53.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	18.00%	17.00%	18.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	17.00%	18.00%	18.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	12.00%	12.00%	12.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer D [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	9.00%	5.00%	5.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Number of Customers	4	4
Entity Wide Accounts Receivable, Major Customer, Percentage	45.00%	44.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Entity Wide Accounts Receivable, Major Customer, Percentage	7.00%	8.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Entity Wide Accounts Receivable, Major Customer, Percentage	20.00%	23.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Entity Wide Accounts Receivable, Major Customer, Percentage	4.00%	6.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer D [Member]
Revenue, Major Customer [Line Items]
Entity Wide Accounts Receivable, Major Customer, Percentage	14.00%	7.00%