Note 9 - Segment Information - Net Sales, Income Before Provision for Income Taxes and Other Related Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019	Oct. 31, 2019
Net sales	$ 10,390	$ 13,626	$ 22,804	$ 24,273
Income (loss) before provision for income taxes	(181)	1,376	(169)	2,184
Depreciation and amortization	253	141	508	278
Total assets	39,412	34,405	39,412	34,405	$ 37,700
Corporate, Non-Segment [Member]
Net sales
Income (loss) before provision for income taxes	7	14	18	36
Depreciation and amortization
Total assets	15,265	14,660	15,265	14,660
RF Connector and Cable Assembly [Member] | Operating Segments [Member]
Net sales	3,768	3,341	6,957	6,599
Income (loss) before provision for income taxes	697	257	979	537
Depreciation and amortization	41	45	83	90
Total assets	8,126	6,972	8,126	6,972
Custom Cabling Manufacturing and Assembly [Member] | Operating Segments [Member]
Net sales	6,622	10,285	15,847	17,674
Income (loss) before provision for income taxes	(885)	1,105	(1,166)	1,611
Depreciation and amortization	212	96	425	188
Total assets	$ 16,021	$ 12,773	$ 16,021	$ 12,773