(Credit Facility) (Details)		3 Months Ended	12 Months Ended			17 Months Ended
	Nov. 08, 2017	Jan. 02, 2018 USD ($)	Jan. 02, 2018 USD ($)	Jan. 03, 2017 USD ($)	Dec. 29, 2015 USD ($)	Jun. 04, 2019 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 97,500,000	$ 97,500,000
Amount outstanding		58,800,000	58,800,000
Letters of credit outstanding		3,300,000	3,300,000
Interest Expense			3,839,000	$ 2,916,000	$ 1,432,000
Amortization of debt issuance costs		500,000	$ 500,000	$ 100,000	$ 100,000
Minimum
Line of Credit Facility [Line Items]
Commitment fee on unused portion of facility	0.35%
Credit facility interest range			3.77%
Maximum
Line of Credit Facility [Line Items]
Commitment fee on unused portion of facility	0.55%
Credit facility interest range			7.00%
Secondary Rates [Member] | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.50%
Secondary Rates [Member] | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.50%
London Interbank Offered Rate (LIBOR) [Member] | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.75%
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
London interbank rate (LIBOR)	LIBOR
Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Line of Credit [Member]
Line of Credit Facility [Line Items]
Negative covenant ratio	3.75
Periodic payment		$ 2,500,000
Capital expenditures			$ 22,000,000.0
Scenario, Forecast [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Capital expenditures						$ 10,000,000.0