Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	May 31, 2014	May 31, 2013
Consolidated Balance Sheets Parenthetical
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	10,000	10,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	11,203	10,599
Common stock, shares outstanding	11,203	10,599