Other Expense, Net (Components of Other Nonoperating (Income) Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Other expense, net:
Post-retirement income	$ (15)	$ (18)	$ (21)
Miscellaneous (income) expense	18	39	22
Other expense, net	$ (3)	$ (21)	$ (1)