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Note 3 - Allowance for Doubtful Accounts (Tables)
 12 Months Ended
Nov. 30, 2018
Notes Tables  
Allowance for Credit Losses on Financing Receivables [Table Text Block]
   
For the Twelve Months Ended
 
   
November 30, 2018
    
November 30, 2017
  
Balance, beginning
   $
32,298
     $
22,746
  
Provision charged to expense
    
2,242
      
11,187
  
Less amounts charged-off
    
(9,440
 )    
(1,635
 )
Balance, ending
   $
25,100
     $
32,298