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Note 10 - Business and Credit Concentrations, Major Customers and Geographic Information (Tables)
12 Months Ended
Oct. 31, 2018
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
   
Years ended October 31,
 
   
2018
   
2017
   
2016
 
United States
  $
74,778,141
    $
51,558,474
    $
51,379,528
 
Outside the United States
   
13,050,449
     
12,534,374
     
13,236,473
 
Total net sales
  $
87,828,590
    $
64,092,848
    $
64,616,001