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Note 4 - Inventories (Tables)
9 Months Ended
Aug. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

August 31,

   

December 1,

 
   

2019

   

2018

 

Raw materials

  $ 171,786     $ 169,228  

Finished goods

    201,823       179,233  

Total inventories

  $ 373,609     $ 348,461