Consolidated Balance Sheets (Parenthetical) - USD ($)	Oct. 31, 2020	Oct. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 144,000	$ 144,000
Accumulated depreciation	7,610,864	6,931,913
Customer list and relationships, accumulated amortization	194,379	151,627
Non-compete, accumulated amortization	$ 49,500	$ 29,700
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	6,633,930	6,494,680
Common stock, shares outstanding	5,708,599	5,569,349
Treasury stock, shares	925,331	925,331