Note 14 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 01, 2018	Dec. 02, 2017	Dec. 03, 2016	Sep. 01, 2018
Operating Leases, Rent Expense, Total	$ 20,620	$ 15,199	$ 12,884
Accrued Environmental Loss Contingencies, Noncurrent	10,665	11,380
Penalties from Possible Resale of Products by Customers Contrary to U.S. Law and Regulations [Member] | Minimum [Member]
Loss Contingency, Estimate of Possible Loss	0			$ 0
Penalties from Possible Resale of Products by Customers Contrary to U.S. Law and Regulations [Member] | Maximum [Member]
Loss Contingency, Estimate of Possible Loss	10,000
Facility in Simpsonville, South Carolina [Member]
Operating Leases, Rent Expense, Total	$ 4,784	$ 5,000