Note 14 - Commitments and Contingencies - Asbestos Related Lawsuits and Claims (Details) - Asbestos Related Lawsuits and Claims [Member] $ in Thousands	12 Months Ended
Nov. 28, 2020 USD ($)	Nov. 30, 2019 USD ($)	Dec. 01, 2018 USD ($)
Lawsuits and claims settled	4	8	7
Settlement amounts	$ 130	$ 424	$ 390
Insurance payments received or expected to be received	$ 88	$ 291	$ 281

Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12053-110248

Name:	us-gaap_LossContingencyReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant