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Note 6 - Product Warranties (Details Textual) (USD $)
12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2012
Standard Product Warranty Disclosure [Abstract]      
Product Warranty Accrual $ 100,000us-gaap_ProductWarrantyAccrual $ 190,000us-gaap_ProductWarrantyAccrual $ 250,000us-gaap_ProductWarrantyAccrual
Product Warranty Expense 220,525us-gaap_ProductWarrantyExpense 224,969us-gaap_ProductWarrantyExpense 348,947us-gaap_ProductWarrantyExpense
Accounts Payable and Accrued Liabilities [Member]      
Standard Product Warranty Disclosure [Abstract]      
Product Warranty Accrual $ 100,000us-gaap_ProductWarrantyAccrual
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccountsPayableAndAccruedLiabilitiesMember
$ 190,000us-gaap_ProductWarrantyAccrual
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccountsPayableAndAccruedLiabilitiesMember