Note 1 - Business Activities and Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2024	Oct. 31, 2023
Amortizable intangible assets, net	$ 11,908	$ 13,595
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	(423)	(378)
Amortizable intangible assets, net	0	45
Customer Relationships [Member]
Amortizable intangible assets, gross	6,058	6,058
Accumulated amortization	(3,848)	(3,461)
Amortizable intangible assets, net	$ 2,210	2,597
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)	(327)
Amortizable intangible assets, net	$ 0	0
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	(208)	(176)
Amortizable intangible assets, net	$ 160	192
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	(302)	(189)
Amortizable intangible assets, net	$ 1,398	1,511
Patented Technology [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years
Amortizable intangible assets, gross	$ 11,100	11,100
Accumulated amortization	(2,960)	(1,850)
Amortizable intangible assets, net	$ 8,140	$ 9,250