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Note 11 - Revenue Recognition - Revenue Attributed to United States and All Other Countries (Details) - USD ($)
 3 Months Ended 12 Months Ended
Oct. 31, 2023
Jul. 31, 2023
Apr. 30, 2023
Jan. 31, 2023
Oct. 31, 2022
Jul. 31, 2022
Apr. 30, 2022
Jan. 31, 2022
Oct. 31, 2023
Oct. 31, 2022
Oct. 31, 2021
Net sales $ 17,329,163 $ 16,941,378 $ 19,619,536 $ 18,283,675 $ 20,055,750 $ 17,382,640 $ 17,200,578 $ 14,440,295 $ 72,173,752 $ 69,079,263 $ 59,136,294
UNITED STATES                      
Net sales                 59,062,858 58,415,280 48,537,091
Non-US [Member]                      
Net sales                 $ 13,110,894 $ 10,663,983 $ 10,599,203