Note 11 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Oct. 31, 2019
Amortizable intangible assets, net	$ 3,527	$ 1,092
Non-amortizable intangible assets, trademarks	1,174	657
Noncompete Agreements [Member]
Amortizable intangible assets, gross	423	200
Accumulated amortization	(222)	(200)
Amortizable intangible assets, net	201
Customer Relationships [Member]
Amortizable intangible assets, gross	5,058	2,879
Accumulated amortization	(2,126)	(1,884)
Amortizable intangible assets, net	2,932	995
Order or Production Backlog [Member]
Amortizable intangible assets, gross	287	134
Accumulated amortization	(200)	(134)
Amortizable intangible assets, net	87
Patents [Member]
Amortizable intangible assets, gross	368	142
Accumulated amortization	(61)	(45)
Amortizable intangible assets, net	$ 307	$ 97