Note 11 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2023	Jan. 31, 2023	Oct. 31, 2022	Jul. 31, 2022	Oct. 31, 2021
Finite-Lived Intangible Assets, Net	$ 14,439	$ 14,439	$ 15,296
Trademarks	$ 1,174		1,174
Trademarks [Member]
Trademarks		1,174	1,174
Noncompete Agreements [Member]
Non-compete agreement (estimated life 5 years)		423	423
Accumulated amortization		(356)	(334)
Finite-Lived Intangible Assets, Net		67	89
Finite-Lived Intangible Asset, Useful Life				5 years	5 years
Customer Relationships [Member]
Non-compete agreement (estimated life 5 years)		6,058	6,058
Accumulated amortization		(3,267)	(3,074)
Finite-Lived Intangible Assets, Net		2,791	2,984
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life				7 years	7 years
Order or Production Backlog [Member]
Non-compete agreement (estimated life 5 years)		327	327
Accumulated amortization		(327)	(313)
Finite-Lived Intangible Assets, Net		0	14
Order or Production Backlog [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life				1 year	1 year
Patents [Member]
Non-compete agreement (estimated life 5 years)		368	368
Accumulated amortization		(160)	(143)
Finite-Lived Intangible Assets, Net		208	225
Patents [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life				10 years	10 years
Trade Names [Member]
Non-compete agreement (estimated life 5 years)		1,700	1,700
Accumulated amortization		(132)	(76)
Finite-Lived Intangible Assets, Net		1,568	1,624
Finite-Lived Intangible Asset, Useful Life				15 years	15 years
Technology-Based Intangible Assets [Member]
Non-compete agreement (estimated life 5 years)		11,100	11,100
Accumulated amortization		(1,295)	(740)
Finite-Lived Intangible Assets, Net		$ 9,805	$ 10,360
Finite-Lived Intangible Asset, Useful Life				10 years	10 years