Note 9 - Bank Credit Facility (Details Textual)		12 Months Ended
	Jan. 27, 2022	Nov. 26, 2022 USD ($)
Bank One [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 25,000,000
Letters of Credit Outstanding, Amount		3,931,000
Line of Credit Facility, Remaining Borrowing Capacity		$ 21,069,000
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
Bank One [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		1.50%
Bank Two [Member]
Letters of Credit Outstanding, Amount		$ 250,000