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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 $)
6 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Balance at beginning of period $ 92,988us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 74,073us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Bad debt expense (recovery) (17,264)us-gaap_ProvisionForDoubtfulAccounts 12,111us-gaap_ProvisionForDoubtfulAccounts
Losses charged to allowance (6,820)us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs   
Balance at end of period $ 68,904us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 86,184us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent