Note 7 - Bank Credit Facility (Details Textual) $ in Thousands		6 Months Ended
	Jan. 27, 2022 USD ($)	May 28, 2022 USD ($)
Bank One [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 25,000
Letters of Credit Outstanding, Amount		3,931
Line of Credit Facility, Remaining Borrowing Capacity		$ 21,069
Debt Instrument, Covenant, Fixed Charge Coverage Ratio	1.4
Debt Instrument, Covenant, Lease-adjusted Leverage Ratio	3.0
Debt Instrument, Covenant, Tangible Net Worth	$ 140,000
Bank One [Member] | One-Month Term Secured Overnight Financing Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		1.50%
Bank Two [Member]
Letters of Credit Outstanding, Amount		$ 325