Continuing operations and reported as discontinued operations (Details) - Comnet Telecom Division [Member] - USD ($)	3 Months Ended	9 Months Ended
	Jul. 31, 2018	Jul. 31, 2018
Major line items constituting pretax income from discontinued operations:
Net sales	$ 2,030,000	$ 6,270,000
Cost of sales	(1,509,000)	(4,703,000)
Gross profit	521,000	1,567,000
Selling, general and administrative expenses	(394,000)	(1,187,000)
Pretax income from discontinued operations	127,000	380,000
Provision for income taxes	38,000	102,000
Income from discontinued operations	$ 89,000	$ 278,000