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Note 6 - Inventory (Tables)
 6 Months Ended
May 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
May 31, 2020
    
November 30, 2019
  
Raw materials
   $
7,400,831
     $
7,156,001
  
Work in process
    
393,939
      
492,125
  
Finished goods
    
4,315,166
      
3,905,373
  
Gross inventory
   $
12,109,936
     $
11,553,499
  
Less: Reserves
    
(2,577,225
 )    
(2,774,992
 )
Net Inventory
   $
9,532,711
     $
8,778,507