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

12 Months Ended

Oct. 31, 2020

Notes Tables

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

		Years ended October 31,
		2020				2019				2018
Balance at beginning of year		$	99,562			$	64,242			$	87,446
Bad debt expense (recovery)			425,055				60,381				(18,455	)
Losses charged to allowance			—				(25,061	)			(4,749	)
Balance at end of year		$	524,617			$	99,562			$	64,242

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