Leases - Right of use asset (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
May 31, 2021	Nov. 30, 2020
Balance, beginning	$ 476
Net amortization	(73)	$ (147)
Derecognition of Fairbanks warehouse lease		(93)
Balance, ending	559	476
Cumulative Effect, Period of Adoption, Adjusted Balance
Balance, beginning	$ 632	872
Balance, ending		$ 632

Amount of amortization of lease incentive costs incurred by the lessor for the benefit of the lessee.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121549951&loc=d3e40010-112707

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=121549951&loc=d3e40019-112707

Name:	us-gaap_AmortizationOfLeaseIncentives
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration