Note 9 - Segment Information - Net Sales, Income Before Provision for Income Taxes and Other Related Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Oct. 31, 2020
Net sales	$ 10,002	$ 12,414
Income (loss) before (benefit) provision for income taxes	(597)	12
Depreciation and amortization	237	255
Total assets	40,635	39,832	$ 40,822
Corporate, Non-Segment [Member]
Net sales
Income (loss) before (benefit) provision for income taxes	(8)	11
Depreciation and amortization
Total assets	17,766	15,178
RF Connector and Cable Assembly [Member] | Operating Segments [Member]
Net sales	3,575	3,189
Income (loss) before (benefit) provision for income taxes	453	282
Depreciation and amortization	35	42
Total assets	7,667	7,496
Custom Cabling Manufacturing and Assembly [Member] | Operating Segments [Member]
Net sales	6,427	9,225
Income (loss) before (benefit) provision for income taxes	(1,042)	(281)
Depreciation and amortization	202	213
Total assets	$ 15,202	$ 17,158