Consolidated Balance Sheets (Parenthetical) (USD $)	May 31, 2013	May 31, 2012
Consolidated Balance Sheets Parenthetical (In Thousands, except per share data, unless otherwise specified)
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	10,599	9,135
Common stock, shares outstanding	10,599	9,135