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Note 8 - Segment Information - Sales by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Net sales	$ 18,910	$ 16,110	$ 38,110	$ 29,568
UNITED STATES
Net sales	16,461	14,415	34,520	26,475
CANADA
Net sales	1,990	949	2,626	1,830
GERMANY
Net sales	107	46	167	95
NETHERLANDS
Net sales	92	42	124	71
UNITED KINGDOM
Net sales	90	211	127	267
All Other Foreign Countries [Member]
Net sales	170	447	546	830
Non-US [Member]
Net sales	$ 2,449	$ 1,695	$ 3,590	$ 3,093

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