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

3 Months Ended

Jan. 31, 2019

Notes Tables

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

	Three Months Ended
	January 31,
	2019		2018
Balance at beginning of period	$	64,242	$	87,446
Bad debt expense		23,809		23,489
Losses charged to allowance		—		(3,127	)
Balance at end of period	$	88,051	$	107,808