Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.19.1
Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Jan. 31, 2019
Apr. 30, 2018
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 19,125,263 17,590,574
Common stock, shares outstanding 18,600,763 17,590,574
Convertible Series C Preferred Stock [Member]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 45,002 45,002
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Convertible Series E Preferred Stock [Member]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 2,500 2,500
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0