Note 8 - Bank Credit Facility (Details Textual) - Bank One [Member]	6 Months Ended
	May 27, 2023 USD ($)
Line of Credit Facility, Maximum Borrowing Capacity	$ 25,000,000
Letters of Credit Outstanding, Amount	3,731,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 21,269,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Debt Instrument, Covenant, Fixed Charge Coverage Ratio	1.4
Debt Instrument, Covenant, Lease-adjusted Leverage Ratio	3.0
Debt Instrument, Covenant, Minimum Tangible Net Worth	$ 140,000
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%