Consolidated Balance Sheets (Parenthetical) - USD ($)	Oct. 31, 2018	Oct. 31, 2017
Statement of Financial Position [Abstract]
Allowances for doubtful accounts	$ 144,000	$ 144,000
Accumulated depreciation	6,251,828	5,557,899
Customer list and relationships, accumulated amortization	108,875	72,250
Non-compete, accumulated amortization	$ 9,900	$ 0
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued
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	5,805,935
Treasury stock, shares	925,331	688,745