Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Apr. 30, 2019	Oct. 31, 2018
Statement of Financial Position [Abstract]
Allowances for doubtful accounts	$ 144,000	$ 144,000
Accumulated depreciation	6,582,909	6,251,828
Customer list and relationships, accumulated amortization	128,834	108,875
Non-compete, accumulated amortization	$ 19,800	$ 9,900
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	6,494,680	6,494,680
Common stock, shares outstanding	5,569,349	5,569,349
Treasury stock, shares	925,331	925,331

Non-compete, accumulated amortization.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of allowance for credit loss on accounts receivable, classified as current.

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