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NOTE E - INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Apr. 30, 2013
NOTE E - INVENTORIES (Details) [Line Items]
Inventory, Net	$ 40,667	$ 37,521
United States [Member]
NOTE E - INVENTORIES (Details) [Line Items]
Inventory, Net	32,100	29,900
Belgium [Member]
NOTE E - INVENTORIES (Details) [Line Items]
Inventory, Net	7,800	6,900
China [Member]
NOTE E - INVENTORIES (Details) [Line Items]
Inventory, Net	$ 700	$ 700

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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 35

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

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