Note 5 - Product Warranties (Details Textual) - USD ($)	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Oct. 31, 2016	Oct. 31, 2015
Standard and Extended Product Warranty Accrual	$ 85,000	$ 90,000	$ 70,000	$ 130,000
Product Warranty Expense	47,855	$ 12,730
Accounts Payable and Accrued Liabilities [Member]
Standard and Extended Product Warranty Accrual	$ 85,000		$ 70,000