Note 8 - Other Liabilities - Current and Long Term Liabilities (Details) - USD ($) $ in Thousands	May 31, 2023	Nov. 30, 2022
Other current liabilities:
Remediation liabilities	$ 1,147	$ 1,156
Lease obligations	184	142
Other Liabilities, Current	1,331	1,298
Other long-term liabilities:
Remediation liabilities	200	200
Lease obligations	707	802
Other Liabilities, Noncurrent	$ 907	$ 1,002

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
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481372/852-10-55-10

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant