Note 2 - Allowance for Doubtful Accounts for Trade Accounts Receivable (Tables)

12 Months Ended

Oct. 31, 2021

Notes Tables

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

	Years ended October 31,
	2021			2020		2019
Balance at beginning of year	$	524,617		$	99,562	$	64,242
Bad debt expense		10,750			425,055		60,381
Losses charged to allowance		(473,840	)		—		(25,061	)
Balance at end of year	$	61,527		$	524,617	$	99,562