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Note 12 - Sales-type Leases (Tables)
 12 Months Ended
Nov. 30, 2019
Notes Tables  
Schedule of Sales-type Leases [Table Text Block]
   
November 30, 2019
    
November 30, 2018
  
Minimum lease receivable, current
   $
162,425
     $
159,500
  
Unearned interest income, current
    
(14,420
 )    
(36,445
 )
Net investment in sales-type leases, current
   $
148,005
     $
123,055
  
                 
Minimum lease receivable, long-term
   $
5,851
     $
168,277
  
Unearned interest income, long-term
    
(69
 )    
(14,490
 )
Net investment in sales-type leases, long-term
   $
5,782
     $
153,787
  
Sales-type Leases, Lease Receivable Maturity [Table Text Block]
Year Ending November 30,
    
Amount
  
2020
      
162,425
  
2021
      
5,851
  
Total
     $
168,276