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Inventories
3 Months Ended
Jul. 31, 2018
Inventories [Abstract]  
Inventories
 
Note 9 Inventories

Inventories were as follows:

  
July 31, 2018
  
April 30, 2018
 
Finished goods
 
$
33,388
  
$
36,503
 
Work-in-process
  
2,414
   
2,139
 
Paper and other materials
  
696
   
550
 
  
$
36,498
  
$
39,192
 
Inventory value of estimated sales returns
  
4,478
   
4,626
 
LIFO reserve
  
(4,404
)
  
(4,329
)
Total inventories
 
$
36,572
  
$
39,489