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Note 2 - Allowance for Doubtful Accounts for Trade Accounts Receivable - Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable (Details) - USD ($)
12 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Oct. 31, 2014
Balance at beginning of year $ 63,011 $ 92,988 $ 74,073
Bad debt expense (recovery) 11,254 (16,889) 18,915
Losses charged to allowance (13,088)
Balance at end of year $ 74,266 $ 63,011 $ 92,988