Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Apr. 30, 2021	Oct. 31, 2020
Trade accounts receivable, allowance for doubtful accounts	$ 64	$ 66
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)	10,001,056	9,814,118
Common stock, shares outstanding (in shares)	10,001,056	9,814,118