Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Apr. 30, 2020	Oct. 31, 2019
Trade accounts receivable, allowance for doubtful accounts	$ 38	$ 23
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	9,758,062	9,462,267
Common stock, shares outstanding (in shares)	9,758,062	9,462,267

Amount of allowance for credit loss on accounts receivable, classified as current.

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