Note 6 - Leases (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Feb. 19, 2020	Nov. 30, 2019	Nov. 27, 2021
Lessee, Operating and Finance Leases, Renewal Term (Year)	5 years
Operating Lease, Weighted Average Remaining Lease Term (Year)			7 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent			3.30%
Finance Lease, Weighted Average Remaining Lease Term (Year)			10 years 1 month 6 days
Finance Lease, Weighted Average Discount Rate, Percent			2.90%
Operating Leases, Rent Expense, Net, Total		$ 19,618
Accounting Standards Update 2016-02 [Member]
Lessee, Operating and Finance Leases, Right-of-Use Assets	$ 28,254
Lessee, Operating and Finance Lease, Liabilities	$ 28,254