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Note 8 - Product Warranty (Tables)
12 Months Ended
Nov. 30, 2015
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
 
 
November 30, 2015
 
 
November 30, 2014
 
Balance, beginning
  $ 234,265     $ 220,719  
Settlements / adjustments
    (329,672 )     (421,787 )
Warranties issued
    274,938       435,333  
Balance, ending
  $ 179,531     $ 234,265