Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.22.4
Consolidated Balance Sheets (Parenthetical) - $ / shares
shares in Thousands
Nov. 30, 2022
May 31, 2022
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000 5,000
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 1,350,000 1,350,000
Common stock, shares issued 825,279 720,028
Common stock, shares outstanding 824,836 719,585
Treasury stock, shares 443 443
Series B Convertible Preferred Stock    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 400 400
Preferred stock, shares issued 19 19
Preferred stock, shares outstanding 19 19
Series C Convertible Preferred Stock    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 8 8
Preferred stock, shares issued 6 7
Preferred stock, shares outstanding 6 7
Series D Convertible Preferred Stock    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 12 12
Preferred stock, shares issued 9 9
Preferred stock, shares outstanding 9 9