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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Common stock, par value (USD per share) $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 27,448,571 27,402,648
Common stock, shares outstanding (in shares) 27,448,571 27,402,648
Series C-1 Convertible Preferred Stock    
Preferred stock, par value (USD per share) $ 0.0001 $ 0.0001
Preferred stock, shares authorized (in shares) 11,000 11,000
Preferred stock, shares issued (in shares) 3,906 3,906
Preferred stock, shares outstanding (in shares) 3,906 3,906
Preferred stock, liquidation $ 3,906 $ 3,906