Note 17 - Earnings (Loss) Per Share - Antidilutive Securities (Details) - shares	12 Months Ended
Nov. 28, 2020	Nov. 30, 2019	Nov. 24, 2018
Restricted Stock [Member]
Antidilutive securities (in shares)	34,500	90,153	45,036
Share-based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	5,250	5,250	0

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration