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Note 4 - Inventories (Tables)
6 Months Ended
Apr. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

April 30,

   

October 31,

 
   

2020

   

2019

 

Finished goods

  $ 5,109,148     $ 5,845,973  

Work in process

    3,794,390       3,321,216  

Raw materials

    7,862,534       8,632,230  

Production supplies

    271,080       296,208  

Total

  $ 17,037,152     $ 18,095,627