Note 5 - Product Warranties (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Oct. 31, 2016	Oct. 31, 2015
Standard and Extended Product Warranty Accrual	$ 95,000	$ 75,000	$ 95,000	$ 75,000	$ 70,000	$ 130,000
Product Warranty Expense	33,783	$ 10,952	81,638	$ 23,682
Accounts Payable and Accrued Liabilities [Member]
Standard and Extended Product Warranty Accrual	$ 95,000		$ 95,000		$ 70,000