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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, 2022
Jul. 31, 2022
Apr. 30, 2022
Jan. 31, 2022
Oct. 31, 2021
Jul. 31, 2021
Apr. 30, 2021
Jan. 31, 2021
Oct. 31, 2022
Oct. 31, 2021
Oct. 31, 2020
Net sales $ 20,055,750 $ 17,382,640 $ 17,200,578 $ 14,440,295 $ 15,883,847 $ 15,634,760 $ 15,741,114 $ 11,876,573 $ 69,079,263 $ 59,136,294 $ 55,277,400
UNITED STATES                      
Net sales                 58,415,280 48,537,091 44,661,958
Non-US [Member]                      
Net sales                 $ 10,663,983 $ 10,599,203 $ 10,615,442