Operating Segment and Geographic Information (Details Textual)	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		18.00%	18.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage Of Accounts Receivables		22.00%
Customer One [Member] | Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	17.00%
Customer One [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Percentage Of Accounts Receivables	22.00%
Customer Two [Member] | Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	18.00%	13.00%
Customer Two [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Percentage Of Accounts Receivables	25.00%	20.00%
Consolidated Total Revenues [Member]
Segment Reporting Information [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	39.40%
Percentage Of Consolidated Revenues For Remaining Customers	No other customer accounted for 10% or more of consolidated total revenues.