Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)

v3.20.4
Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
Oct. 31, 2020
Apr. 30, 2020
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 50,000,000 50,000,000
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 200,000,000 200,000,000
Common stock, shares issued 3,664,019 2,903,393
Common stock, shares outstanding 3,664,019 2,903,393
Convertible Series F Preferred Stock [Member]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 1,250 1,250
Preferred stock, shares issued
Preferred stock, shares outstanding
Convertible Series G Preferred Stock [Member]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 127 127
Preferred stock, shares issued 57
Preferred stock, shares outstanding 57
Convertible Series H Preferred Stock [Member]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 106,894
Preferred stock, shares issued 106,894
Preferred stock, shares outstanding 106,894
Preferred stock, liquidation preference
Convertible Series I Preferred Stock [Member]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 921,666
Preferred stock, shares issued 921,666
Preferred stock, shares outstanding 921,666
Preferred stock, liquidation preference