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Note E - Accrued Liabilities (Tables)
 9 Months Ended
Jan. 31, 2020
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
(In thousands)   January 31, 2020   April 30, 2019
         
Employee compensation   $
6,059
     $
6,321
  
Cash overdrafts (see Note B)    
1,052
      
1,274
  
Deferred sales tax (see Note B)    
2,611
      
3,571
  
Reserve for PPP claims    
2,882
      
2,433
  
Health insurance    
1,052
      
1,256
  
Other    
1,405
      
3,982
  
                 
Total   $
15,061
     $
18,837