Quarterly report pursuant to Section 13 or 15(d)

CONDENSED BALANCE SHEETS (UNAUDITED) (Parenthetical)

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CONDENSED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares
Jun. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 21,596,544 21,189,943
Common stock shares outstanding (in shares) 21,596,544 21,189,943