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Note 11 - Revenue Recognition (Tables)
Apr. 30, 2022
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
   

Three months ended

   

Six months ended

 
   

April 30,

   

April 30,

 
   

2022

   

2021

   

2022

   

2021

 

United States

  $ 14,792,289     $ 12,381,735     $ 26,936,668     $ 22,085,345  

Outside the United States

    2,408,289       3,359,379       4,704,205       5,532,342  

Total net sales

  $ 17,200,578     $ 15,741,114     $ 31,640,873     $ 27,617,687