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Note 5 - Product Warranties (Details Textual) - USD ($)
3 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Oct. 31, 2015
Oct. 31, 2014
Accounts Payable and Accrued Liabilities [Member]        
Product Warranty Accrual $ 90,000   $ 130,000  
Product Warranty Accrual 90,000 $ 105,000 $ 130,000 $ 100,000
Product Warranty Expense $ 12,730 $ 39,079