Provision for Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 600
Undistributed Earnings of Foreign Subsidiaries		22,800
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount		$ (1,800)
Effective Income Tax Rate Reconciliation, Percent		35.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		$ (2,986)	$ 0	$ 0
Increase (Decrease) in Income Taxes		$ (1,800)
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, Percent	21.00%