Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.2.0.727
Consolidated Balance Sheets (Parenthetical) - $ / shares
None in scaling factor is -9223372036854775296
May. 31, 2015
May. 31, 2014
Common stock, par value    
Common stock, shares authorized 200,000,000 100,000,000
Common stock, shares issued 63,644,348 55,753,311
Common stock, shares outstanding 63,644,348 55,753,311
Series B Convertible Preferred Stock    
Series B Convertible preferred stock, par value    
Series B Convertible preferred stock, shares authorized 400,000 400,000
Series B Convertible preferred stock, shares issued 95,100 95,100
Series B Convertible preferred stock, shares outstanding 95,100 95,100