Note 15 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Aug. 29, 2020	Nov. 30, 2019
Accrued Environmental Loss Contingencies, Noncurrent	$ 6,989	$ 8,535
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
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	$ 3,851	$ 4,117

Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable after twelve months or beyond the next operating cycle if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 10
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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