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Inventories (Tables)
9 Months Ended
Jan. 31, 2022
Inventories [Abstract]  
Inventories
Inventories, net consisted of the following:

 
January 31, 2022
   
April 30, 2021
 
Finished goods
 
$
29,613
   
$
31,704
 
Work-in-process
   
2,053
     
2,060
 
Paper and other materials
   
260
     
331
 
Total inventories before estimated sales returns and LIFO reserve
 
$
31,926
   
$
34,095
 
Inventory value of estimated sales returns
   
10,243
     
10,886
 
LIFO reserve
   
(2,443
)
   
(2,443
)
Inventories, net
 
$
39,726
   
$
42,538