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Note 11 - Revenue Recognition (Tables)
12 Months Ended
Oct. 31, 2020
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
  

Years ended October 31,

 
  

2020

  

2019

  

2018

 

United States

 $44,661,958  $58,207,966  $74,778,141 

Outside the United States

  10,615,442   13,116,480   13,050,449 

Total net sales

 $55,277,400  $71,324,446  $87,828,590