9. Stock-Based Compensation : Equity compensation (Details) - shares	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Shares Outstanding	1,690,000	1,847,000	1,522,000
2009 Stock Incentive Plan
Shares Authorized	3,000,000
Shares Available for Grant	0
Shares Outstanding	1,027,500
Last Date for Grant of Shares	Feb. 24, 2019
2019 Stock Incentive Plan
Shares Authorized	5,000,000
Shares Available for Grant	4,337,500
Shares Outstanding	662,500
Last Date for Grant of Shares	Feb. 26, 2029