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Note 4 - Inventories (Tables)
6 Months Ended
Apr. 30, 2018
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
April 30,
   
October 31,
 
   
2018
   
2017
 
Finished goods
  $
4,831,941
    $
5,869,269
 
Work in process
   
3,621,043
     
2,507,434
 
Raw materials
   
10,015,377
     
8,108,433
 
Production supplies
   
295,214
     
296,313
 
Total
  $
18,763,575
    $
16,781,449