Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	May 31, 2012	May 31, 2011
Consolidated Balance Sheets Parenthetical
Preferred stock shares par value	$ 0.01	$ 0.01
Preferred stock shares Authorized	10,000	10,000
Preferred stock shares Issued	0	0
Preferred stock shares Outstanding	0	0
Common stock shares par value	$ 0.01	$ 0.01
Common stock shares Authorized	75,000	75,000
Common stock shares Issued	9,135	8,932
Common stock shares Outstanding	9,135	8,932