Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Consolidated Balance Sheets (Parenthetical) - $ / shares
Nov. 30, 2017
May 31, 2017
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 375,000,000 350,000,000
Common stock, shares issued 165,135,154 149,468,244
Common stock, shares outstanding 165,135,154 149,468,244
Series B Convertible Preferred Stock    
Series B Convertible preferred stock, par value $ 0.001 $ 0.001
Series B Convertible preferred stock, shares authorized 400,000 400,000
Series B Convertible preferred stock, shares issued 92,100 92,100
Series B Convertible preferred stock, shares outstanding 92,100 92,100