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Geographic Information (Tables)
6 Months Ended
Nov. 30, 2014
Geographic Information Disclosure [Abstract]  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

 

Six Months Ended

November 30,

 

Three Months Ended

November 30,

 

 

 

2014

 

2013

 

2014

 

2013

 

 

 

 

 

 

 

 

 

 

 

 

Revenues from sales to unaffiliated customers:

 

 

 

 

 

 

 

 

 

 

 

United States

$

473,000

 

$

505,000

 

$

220,000

 

$

251,000

Asia

 

118,000

 

 

216,000

 

 

102,000

 

 

80,000

Europe

 

1,444,000

 

 

1,199,000

 

 

693,000

 

 

594,000

South America

 

6,000

 

 

7,000

 

 

3,000

 

 

4,000

Middle East

 

113,000

 

 

20,000

 

 

111,000

 

 

5,000

Other

 

14,000

 

 

2,000

 

 

5,000

 

 

1,000

 

$

2,168,000

 

$

1,949,000

 

$

1,134,000

 

$

935,000