Long-Term Debt (Details) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Sep. 01, 2016
Line of Credit Facility [Line Items]
Interest Expense, Debt	$ 288,000	$ 946,000
Wells Fargo Bank, N.A. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	87,100,000
Letters of Credit Outstanding, Amount	12,900,000
Revolving Credit Facility [Member] | Wells Fargo Bank, N.A. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	50,000,000		$ 100,000,000
Line of Credit [Member] | Wells Fargo Bank, N.A. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 50,000,000		$ 50,000,000