XML 35 R24.htm IDEA: XBRL DOCUMENT v3.10.0.1
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, 2018
Jul. 31, 2017
Balance $ 87,446 $ 74,266
Bad debt expense (recovery) (29,247) 6,161
Losses charged to allowance (4,648) (4,729)
Recoveries added to allowance 129
Balance $ 53,551 $ 75,827