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

6 Months Ended

Apr. 30, 2021

Notes Tables

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

	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