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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Jun. 30, 2019
Dec. 31, 2018
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 10,000,000 0
Preferred stock, shares issued 0  
Preferred stock, shares outstanding 0  
Common stock, par value $ 0.000005 $ 0.000005
Common stock, shares authorized 200,000,000 130,000,000
Common stock, shares issued 51,401,015 16,717,117
Common stock, shares outstanding 50,590,543 15,906,645
Series A Convertible Preferred Stock    
Preferred stock, par value   $ 0.0001
Preferred stock, shares authorized   25,650,000
Preferred stock, shares issued   25,650,000
Preferred stock, shares outstanding   25,650,000
Series B Convertible Preferred Stock    
Preferred stock, par value   $ 0.0001
Preferred stock, shares authorized   21,956,100
Preferred stock, shares issued   21,956,095
Preferred stock, shares outstanding   21,956,095