Note 6 - Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Nov. 28, 2020	Nov. 30, 2019
Operating lease right-of-use assets	$ 28,445	$ 0
Other Noncurrent Assets [Member]
Operating lease right-of-use assets	28,445
Other Accrued Expenses [Member]
Current operating lease liabilities	8,706	0
Other Noncurrent Liabilities [Member]
Noncurrent operating lease liabilities	19,498	$ 0
Other Accrued Expenses and Other Noncurrent Liabilities [Member]
Total operating lease liabilities	$ 28,204