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Note 11 - Lease Right-to-use (Tables)
6 Months Ended
Oct. 31, 2020
Notes Tables  
Lessee, Finance Lease, Right of Use Assets [Table Text Block]
   
October 31, 2020
 
Right-to-use assets
  $
44,349
 
Less accumulated depreciation
   
4,273
 
Total
  $
40,076
 
Finance Lease, Liability, Fiscal Year Maturity [Table Text Block]
2022
  $
5,244
 
2023
   
5,260
 
2024
   
5,314
 
2025
   
5,317
 
2026
   
5,268
 
Thereafter
   
56,979
 
Total minimum lease payments
   
83,382
 
Less amount representing interest
   
40,567
 
Present value of net minimum lease payments
   
42,815
 
Less current maturities of lease liability
   
1,228
 
Lease liability, net of current maturities
  $
41,587