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Condensed Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Mar. 31, 2021
Dec. 31, 2020
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.00001 $ 0.00001
Common stock, shares authorized 500,000,000 500,000,000
Common stock, shares issued 90,675,268 89,301,664
Common stock, shares, outstanding 90,675,268 89,301,664