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Product Development Assets (Tables)
12 Months Ended
Apr. 30, 2022
Product Development Assets [Abstract]  
Product Development Assets
Product development assets, net consisted of the following at April 30:

 
2022
   
2021
 
Book composition costs
 
$
20,574
   
$
20,474
 
Software costs
   
17,479
     
23,262
 
Content development costs
   
3,405
     
5,781
 
Product development assets, net
 
$
41,458
   
$
49,517