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Note 11 - Finance Lease Right-of-use (Tables)
9 Months Ended
Jan. 31, 2020
Notes Tables  
Lessee, Finance Lease, Right of Use Assets [Table Text Block]
   
January 31, 2020
 
Right-of-use assets
  $
44,349
 
Less accumulated depreciation
   
2,130
 
Total
  $
42,219
 
Finance Lease, Liability, Maturity [Table Text Block]
2021
  $
5,223
 
2022
   
5,243
 
2023
   
5,273
 
2024
   
5,328
 
2025
   
5,292
 
Thereafter
   
60,937
 
Total minimum lease payments
   
87,296
 
Less amount representing interest
   
43,652
 
Present value of net minimum lease payments
   
43,644
 
Less current maturities of finance lease liability
   
1,123
 
Finance lease liability, net of current maturities
  $
42,521
 
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
Increase in depreciation
  $
2,118
 
Increase in interest expense
   
3,128
 
Decrease in rent expense
   
(3,845
)
Decrease in net income for the nine months ended January 31, 2020
  $
1,401