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, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020	Oct. 31, 2020
Net sales	$ 11,057	$ 10,390	$ 21,059	$ 22,804
Income (loss) before (benefit) provision for income taxes	5,493	(181)	4,896	(169)
Depreciation and amortization	177	253	414	508
Total assets	42,767	39,412	42,767	39,412	$ 40,822
Corporate, Non-Segment [Member]
Net sales	0	0	0	0
Income (loss) before (benefit) provision for income taxes	2,809	7	2,801	18
Depreciation and amortization	0	0	0	0
Total assets	18,469	15,265	18,469	15,265
RF Connector and Cable Assembly [Member] | Operating Segments [Member]
Net sales	3,552	3,768	7,127	6,957
Income (loss) before (benefit) provision for income taxes	1,495	697	1,947	979
Depreciation and amortization	35	41	70	83
Total assets	7,463	8,126	7,463	8,126
Custom Cabling Manufacturing and Assembly [Member] | Operating Segments [Member]
Net sales	7,505	6,622	13,932	15,847
Income (loss) before (benefit) provision for income taxes	1,189	(885)	148	(1,166)
Depreciation and amortization	142	212	344	425
Total assets	$ 16,835	$ 16,021	$ 16,835	$ 16,021