Note 12 - Earnings (Loss) Per Share - Antidilutive Securities (Details) - shares	3 Months Ended	9 Months Ended
Aug. 29, 2020	Aug. 31, 2019	Aug. 29, 2020	Aug. 31, 2019
Antidilutive securities (in shares)	3,500	45,653	93,403	45,653
Share-based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	0	0	5,250	0
Unvested Shares [Member]
Antidilutive securities (in shares)	3,500	45,653	88,153	45,653

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