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Note 13 - Sales-type Leases (Tables)
 6 Months Ended
May 31, 2019
Notes Tables  
Schedule of Sales-type Leases [Table Text Block]
   
May 31, 2019
    
November 30, 2018
  
Minimum lease receivable, current
   $
174,000
     $
159,500
  
Unearned interest income, current
    
(28,201
 )   $
(36,445
 )
Net investment in sales-type leases, current
    
145,799
      
123,055
  
                 
Minimum lease receivable, long-term
    
81,276
     $
168,277
  
Unearned interest income, long-term
    
(3,669
 )   $
(14,490
 )
Net investment in sales-type leases, long-term
   $
77,607
     $
153,787
  
Sales-type Leases, Lease Receivable Maturity [Table Text Block]
Year Ending November 30,
  
Amount
  
2019
   $
87,000
  
2020
    
162,425
  
2021
    
5,851
  
Total
   $
255,276