Business Acquisitions - Additional Information (Detail) - USD ($)			1 Months Ended	2 Months Ended	3 Months Ended		9 Months Ended
	Jun. 02, 2015	Nov. 02, 2014	May. 19, 2015	Jul. 31, 2015	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jun. 05, 2015
Payments to Acquire Businesses, Gross							$ 2,100,000
Revenues					$ 8,899,000	$ 5,536,000	23,868,000	$ 17,150,000
Rel-Tech Electronics, Inc
Business Acquisition Cost Of Acquired Entity Purchase Price value									$ 100
Business Acquisition, Additional Payment In Cash							$ 800,000
Business Acquisition Unregistered Common Stock Shares							50,467
Business Acquisition Unregistered Common Stock Value							$ 200,000
Payments to Acquire Businesses, Gross	$ 2,100,000						$ 3,100,000
Business Combination, Consideration Transferred	610,000
Business Acquisition, Share Price				$ 3.96	$ 3.96		$ 3.96
Revenues				$ 1,200,000
Business Acquisition Cost Of Acquired Entity Purchases Price	$ 2,910,000
Rel-Tech Electronics, Inc | Palumbo
Salary Payable To President							$ 150,000
Description For President Annual Bonus							earn an annual bonus of up to 50% of his base salary
CompPro Product Line
Payments to Acquire Businesses, Gross			$ 700,000
Business Acquisition Cost Of Acquired Entity Purchases Price			$ 700,000
Comnet Telecom Supply Inc
Business Acquisition Cost Of Acquired Entity Purchase Price value				$ 1,060,000	$ 1,060,000		$ 1,060,000
Business Acquisition, Additional Payment In Cash							$ 300,000
Business Acquisition Unregistered Common Stock Shares							252,381
Business Acquisition, Percentage of Voting Interests Acquired				100.00%	100.00%		100.00%
Payments to Acquire Businesses, Gross		$ 3,090,000
Business Combination, Consideration Transferred		1,235,000
Revenues					$ 2,800,000		$ 7,800,000
Business Acquisition Cost Of Acquired Entity Purchases Price		$ 5,385,000		$ 4,150,000	4,150,000		4,150,000
Comnet Telecom Supply Inc | Mr. Portera
Business Acquisition Cost Of Acquired Entity Purchase Price value				$ 4,150,000	$ 4,150,000		4,150,000
Business Acquisition, Additional Payment In Cash							$ 1,360,000
Description For President Annual Bonus							earn an annual bonus of up to 50% of his base salary
Business Combination, Consideration Transferred							$ 210,000
Business Acquisition, Share Price				$ 4.20	$ 4.20		$ 4.20