Note 10 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Oct. 31, 2021
Amortizable intangible assets, net	$ 2,644	$ 2,739
Non-amortizable intangible assets, trademarks	1,174	1,174
Noncompete Agreements [Member]
Amortizable intangible assets, gross	423	423
Accumulated amortization	(300)	(289)
Amortizable intangible assets, net	123	134
Customer Relationships [Member]
Amortizable intangible assets, gross	5,058	5,058
Accumulated amortization	(2,786)	(2,711)
Amortizable intangible assets, net	2,272	2,347
Order or Production Backlog [Member]
Amortizable intangible assets, gross	287	287
Accumulated amortization	(287)	(287)
Amortizable intangible assets, net	249	258
Patents [Member]
Amortizable intangible assets, gross	368	368
Accumulated amortization	$ (119)	$ (110)