Note 3 - Allowance for Doubtful Accounts for Trade Accounts Receivable

6 Months Ended

Apr. 30, 2021

Notes to Financial Statements

Allowance for Doubtful Accounts for Trade Accounts Receivable Disclosure [Text Block]

(3) Allowance for Doubtful Accounts for Trade Accounts Receivable

A summary of changes in the allowance for doubtful accounts for trade accounts receivable for the six months ended April 30, 2021 and 2020 follows:

	Six Months Ended
	April 30,
	2021		2020
Balance at beginning of period	$	524,617	$	99,562
Bad debt expense		4,616		452,060
Balance at end of period	$	529,233	$	551,622