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Note J - Commitments and Contingencies (Tables)
3 Months Ended
Jul. 31, 2020
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Maturity of lease liabilities

    

2021 (remaining)

 $5,150 

2022

  6,917 

2023

  6,843 

2024

  6,322 

2025

  6,139 

Thereafter

 $56,888 

Total undiscounted operating lease payments

  88,259 

Less: imputed interest

  (22,939)

Present value of operating lease liabilities

 $65,320