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Note 11 - Finance Lease Right-of-use Assets (Tables)
3 Months Ended
Jul. 31, 2019
Notes Tables  
Lessee, Finance Lease, Right of Use Assets [Table Text Block]
   
July 31, 2019
 
Right-of-use assets
  $
43,680
 
Less accumulated depreciation
   
693
 
Total
  $
42,987
 
Finance Lease, Liability, Maturity [Table Text Block]
2020
  $
5,195
 
2021
   
5,242
 
2022
   
5,241
 
2023
   
5,293
 
2024
   
5,333
 
Thereafter
   
60,365
 
Total minimum lease payments
   
86,669
 
Less amount representing interest
   
43,215
 
Present value of net minimum lease payments
   
43,454
 
Less current maturities of finance lease liability
   
1,070
 
Finance lease liability, net of current maturities
  $
42,384
 
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
Increase in depreciation
  $
693
 
Increase in interest expense
   
1,035
 
Decrease in rent expense
   
(1,218
)
Decrease in net income for the three months ended July 31, 2019
  $
510