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Note 4 - Inventories (Tables)
9 Months Ended
Jul. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

July 31,

   

October 31,

 
   

2019

   

2018

 

Finished goods

  $ 5,965,837     $ 5,454,629  

Work in process

    4,169,232       3,877,670  

Raw materials

    8,385,386       7,871,145  

Production supplies

    292,056       271,311  

Total

  $ 18,812,511     $ 17,474,755