Note 2 - Business Acquisition - Unaudited Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Revenue			$ 40,642	$ 44,527
Net (loss) income			$ (581)	$ 739
Basic (in dollars per share)			$ (0.06)	$ 0.07
Diluted (in dollars per share)			$ (0.06)	$ 0.07
Basic (in shares)			10,256,158	10,087,309
Diluted (in shares)			10,256,158	10,229,704
Microlab/FXR LLC [Member]
Revenue	$ 22,298	$ 22,559
Net (loss) income	$ 581	$ 429
Basic (in dollars per share)	$ 0.06	$ 0.04
Diluted (in dollars per share)	$ 0.06	$ 0.04
Basic (in shares)	10,290,911	10,107,687
Diluted (in shares)	10,327,271	10,243,636