Note 7 - Segment Information - Sales by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Net sales	$ 57,424	$ 43,044
UNITED STATES
Net sales	54,960	41,633
CANADA
Net sales	1,856	933
MEXICO
Net sales	130	12
All Other Foreign Countries [Member]
Net sales	478	466
Non-US [Member]
Net sales	$ 2,464	$ 1,411