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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Statement Of Financial Position [Abstract]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 25,000,000 25,000,000
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 250,000,000 250,000,000
Common stock, shares issued 66,818,520 57,838,220
Common stock, shares outstanding 66,818,520 57,838,220