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Note E - Accrued Liabilities (Tables)
 12 Months Ended
Apr. 30, 2020
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
(In thousands)   April 30, 2020   April 30, 2019
         
Employee compensation   $
8,199
     $
6,321
  
Cash overdrafts (see Note B)    
-
      
1,274
  
Deferred sales tax (see Note B)    
2,974
      
3,571
  
Reserve for PPP claims    
2,926
      
2,433
  
Health insurance    
1,187
      
-
  
Fair value of contingent consideration    
2,713
      
-
  
Other    
1,730
      
5,238
  
                 
Accrued liabilities   $
19,729
     $
18,837