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Note 5 - Inventory
 6 Months Ended
May 31, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
 
5
)
Inventory
 
Major classes of inventory are:
 
   
May 31, 2018
    
November 30, 2017
  
Raw materials
   $
8,293,049
     $
8,731,985
  
Work in process
    
252,598
      
460,687
  
Finished goods
    
4,839,361
      
5,395,353
  
Gross inventory
   $
13,385,008
     $
14,588,025
  
Less: Reserves
    
(2,655,936
 )    
(2,621,303
 )
Net Inventory
   $
10,729,072
     $
11,966,722