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Net sales, income (loss) before provision for income taxes and other related segment information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2019
Jul. 31, 2018
Oct. 31, 2018
Segment Reporting Information [Line Items]          
Net sales $ 15,511 $ 11,820 $ 39,784 $ 40,302  
Income (loss) from continuing operations before provision for income taxes 1,315 2,028 3,499 6,352  
Depreciation and amortization 140 129 418 383  
Total assets 36,113 32,913 36,113 32,913 $ 32,502
RF Connector and Cable Assembly          
Segment Reporting Information [Line Items]          
Net sales 3,462 3,139 10,061 8,503  
Income (loss) from continuing operations before provision for income taxes 151 219 697 (420)  
Depreciation and amortization 40 42 130 129  
Total assets 6,969 6,336 6,969 6,336  
Custom Cabling Manufacturing and Assembly          
Segment Reporting Information [Line Items]          
Net sales 12,049 8,681 29,723 31,799  
Income (loss) from continuing operations before provision for income taxes 1,125 1,796 2,727 6,753  
Depreciation and amortization 100 87 288 254  
Total assets 15,007 9,006 15,007 9,006  
Corporate          
Segment Reporting Information [Line Items]          
Net sales 0 0 0 0  
Income (loss) from continuing operations before provision for income taxes 39 13 75 19  
Depreciation and amortization 0 0 0 0  
Total assets $ 14,137 $ 17,571 $ 14,137 $ 17,571