Note 7 - Segment Information - Sales by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Net sales	$ 43,044	$ 55,325
UNITED STATES
Net sales	41,633	54,365
CANADA
Net sales	933	592
MEXICO
Net sales	12	109
All Other Foreign Countries [Member]
Net sales	466	259
Non-US [Member]
Net sales	$ 1,411	$ 960