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Note 3 - Allowance for Doubtful Accounts for Trade Accounts Receivable - Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable (Details) - USD ($)
9 Months Ended
Jul. 31, 2015
Jul. 31, 2014
Balance at beginning of period $ 92,988 $ 74,073
Bad debt expense (recovery) (14,203) $ 18,655
Losses charged to allowance (6,820)  
Balance at end of period $ 71,965 $ 92,728