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Income Taxes (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Feb. 28, 2014
May 31, 2014
May 31, 2013
May 31, 2012
Current        
Federal   $ (133) $ (1,622) $ 448
State and local   99 (52) (19)
Non U.S.   157 468 18
Current, Total   123 (1,206) 447
Deferred   3,169 1,175 (635)
Income tax expense/(benefit), Total $ 176 $ 3,292 $ (31) $ (188)