Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Oct. 31, 2020	Oct. 31, 2019
Trade accounts receivable, allowance for doubtful accounts	$ 66	$ 23
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	21,250,000	20,000,000
Common stock, shares issued (in shares)	9,814,118	9,462,267
Common stock, shares outstanding (in shares)	9,814,118	9,462,267