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Note 4 - Inventories (Tables)
3 Months Ended
Jan. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
January 31,
   
October 31,
 
   
2019
   
2018
 
Finished goods
  $
6,479,017
    $
5,454,629
 
Work in process
   
3,635,301
     
3,877,670
 
Raw materials
   
9,071,998
     
7,871,145
 
Production supplies
   
299,240
     
271,311
 
Total
  $
19,485,556
    $
17,474,755