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Note 8 - Product Warranty (Details) - Changes In Product Warranty Liability (USD $)
12 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Changes In Product Warranty Liability [Abstract]    
Balance, beginning $ 578,864 $ 201,630
Balance, ending 220,719 578,864
Settlements / adjustments (605,281) (436,096)
Warranties issued $ 247,136 $ 813,330