Note 1 - Business Activities and Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Oct. 31, 2020
Amortizable intangible assets	$ 2,739	$ 3,181
Trademarks	1,174	1,174
Trademarks [Member]
Trademarks	1,174	1,174
Noncompete Agreements [Member]
Amortizable intangible assets, gross	423	423
Accumulated amortization	(289)	(245)
Amortizable intangible assets	134	178
Customer Relationships [Member]
Amortizable intangible assets, gross	5,058	5,058
Accumulated amortization	(2,711)	(2,367)
Amortizable intangible assets	2,347	2,691
Order or Production Backlog [Member]
Amortizable intangible assets, gross	287	287
Accumulated amortization	(287)	(266)
Amortizable intangible assets	0	21
Patents [Member]
Amortizable intangible assets, gross	368	368
Accumulated amortization	(110)	(77)
Amortizable intangible assets	$ 258	$ 291

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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