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Note 1 - Business Activities and Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2023	Oct. 31, 2022
Amortizable intangible assets, net	$ 13,595	$ 15,296
Non-amortizable intangible assets	1,174	1,174
Trademarks [Member]
Non-amortizable intangible assets	$ 1,174	1,174
Noncompete Agreements [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years
Amortizable intangible assets, gross	$ 423	423
Accumulated amortization	(378)	(334)
Amortizable intangible assets, net	45	89
Customer Relationships [Member]
Amortizable intangible assets, gross	6,058	6,058
Accumulated amortization	(3,461)	(3,074)
Amortizable intangible assets, net	$ 2,597	2,984
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	7 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	15 years
Order or Production Backlog [Member]
Amortizable intangible assets, gross	$ 327	327
Accumulated amortization	(327)	(313)
Amortizable intangible assets, net	$ 0	14
Order or Production Backlog [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	1 year
Order or Production Backlog [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	2 years
Patents [Member]
Amortizable intangible assets, gross	$ 368	368
Accumulated amortization	(176)	(143)
Amortizable intangible assets, net	$ 192	225
Patents [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years
Patents [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	14 years
Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	15 years
Amortizable intangible assets, gross	$ 1,700	1,700
Accumulated amortization	(189)	(76)
Amortizable intangible assets, net	$ 1,511	1,624
Patented Technology [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years
Amortizable intangible assets, gross	$ 11,100	11,100
Accumulated amortization	(1,850)	(740)
Amortizable intangible assets, net	$ 9,250	$ 10,360

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
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-Section 50
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 928
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
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-Section 50
-Paragraph 5
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