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Note 4 - Property and Equipment, Net (Tables)
12 Months Ended
Oct. 31, 2018
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
October 31,
 
   
2018
   
2017
 
Land and land improvements
  $
3,148,834
    $
3,148,834
 
Building and improvements
   
8,244,384
     
8,165,637
 
Machinery and equipment
   
27,312,627
     
25,817,318
 
Furniture and fixtures
   
902,633
     
894,237
 
Construction in progress
   
225,759
     
1,727,591
 
Total property and equipment, at cost
   
39,834,237
     
39,753,617
 
Less accumulated amortization and depreciation
   
(28,629,598
)    
(27,542,925
)
Property and equipment, net
  $
11,204,639
    $
12,210,692