NOTE E - INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014	Apr. 30, 2014
NOTE E - INVENTORIES (Details) [Line Items]
Inventory, Net	$ 41,265	$ 41,227
UNITED STATES
NOTE E - INVENTORIES (Details) [Line Items]
Inventory, Net	32,600	33,400
BELGIUM
NOTE E - INVENTORIES (Details) [Line Items]
Inventory, Net	7,200	7,100
CHINA
NOTE E - INVENTORIES (Details) [Line Items]
Inventory, Net	$ 1,500	$ 700