Note 3 - Allowance for Doubtful Accounts for Trade Accounts Receivable (Tables)

9 Months Ended

Jul. 31, 2020

Notes Tables

Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable [Table Text Block]

	Nine Months Ended
	July 31,
	2020		2019
Balance at beginning of period	$	99,562	$	64,242
Bad debt expense		431,746		56,483
Losses charged to allowance		—		(25,061	)
Balance at end of period	$	531,308	$	95,664