Note 9 - Segment Information - Net Sales, Income Before Provision for Income Taxes and Other Related Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019	Oct. 31, 2019
Net sales	$ 9,544	$ 15,511	$ 32,348	$ 39,784
Income (loss) before benefit for income taxes	(219)	1,315	(388)	3,499
Depreciation and amortization	252	140	760	418
Total assets	40,894	36,113	40,894	36,113	$ 37,700
Corporate, Non-Segment [Member]
Net sales
Income (loss) before benefit for income taxes	1	39	19	75
Depreciation and amortization
Total assets	16,942	14,137	16,942	14,137
RF Connector and Cable Assembly [Member] | Operating Segments [Member]
Net sales	3,611	3,462	10,568	10,061
Income (loss) before benefit for income taxes	500	151	1,479	697
Depreciation and amortization	40	40	123	130
Total assets	8,413	6,969	8,413	6,969
Custom Cabling Manufacturing and Assembly [Member] | Operating Segments [Member]
Net sales	5,933	12,049	21,780	29,723
Income (loss) before benefit for income taxes	(720)	1,125	(1,886)	2,727
Depreciation and amortization	212	100	637	288
Total assets	$ 15,539	$ 15,007	$ 15,539	$ 15,007