Note 8 - Segment Information - Sales by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Net sales	$ 16,918	$ 10,002
UNITED STATES
Net sales	16,418	9,379
CANADA
Net sales	297	525
MEXICO
Net sales	25	0
All Other Foreign Countries [Member]
Net sales	178	98
Non-US [Member]
Net sales	$ 500	$ 623