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Condensed Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Statement Of Financial Position [Abstract]    
Convertible preferred stock, Series A, par value $ 0.0001 $ 0.0001
Convertible preferred stock, Series A, shares authorized 27,564,260 27,564,260
Convertible preferred stock, Series A, shares issued 9,993,727 9,993,727
Convertible preferred stock, Series A, shares outstanding 9,993,727 9,993,727
Convertible preferred stock, Series A, liquidation preference, value $ 39,390 $ 37,969
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 50,700,000 50,700,000
Common stock, shares, issued 3,764,488 3,764,488
Common stock, shares, outstanding 3,764,488 3,764,488