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PROPERTY, PLANT AND EQUIPMENT (Tables)
 3 Months Ended
Jul. 31, 2018
Property, Plant and Equipment Disclosure [Abstract]  
Property, Plant and Equipment [Table Text Block]
Property, plant and equipment, net consist of:
 
 
 
July 31,
 
 
April 30,
 
 
 
2018
 
 
2018
 
 
 
(in thousands)
 
Land, buildings and improvements
 
$
15,939
 
 
$
15,932
 
Furniture and equipment
 
 
18,280
 
 
 
18,239
 
 
 
 
34,219
 
 
 
34,171
 
Less accumulated depreciation
 
 
(24,727
)
 
 
(24,426
)
 
 
$
9,492
 
 
$
9,745