Note 8 - Other Liabilities - Current and Long Term Liabilities (Details) - USD ($) $ in Thousands	May 31, 2022	Nov. 30, 2021
Other current liabilities:
Remediation liabilities, current	$ 769	$ 840
Lease obligations, current	146	224
Other Liabilities, Current	915	1,064
Other long-term liabilities:
Remediation liabilities, noncurrent	280	280
Lease obligations, noncurrent	901	184
Other Liabilities, Noncurrent	$ 1,181	$ 464

Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_OtherLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant