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Stock-Based Compensation - Summary of Restricted Stock Units Activity (Details) - Restricted Stock Units - 2019 Plan and Inducement Plan - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Unvested Restricted Stock Units, Number of Shares, Beginning Balance 2,621,482 1,679,696 619,218
Unvested Restricted Stock Units, Number of Shares, granted 24,500 2,071,201 1,387,656
Unvested Restricted Stock Units, Number of Shares, vested (839,194) (897,871) (266,119)
Unvested Restricted Stock Units, Number of Shares, forfeited (552,962) (231,544) (61,059)
Unvested Restricted Stock Units, Number of Shares, Ending Balance 1,253,826 2,621,482 1,679,696
Unvested Restricted Stock Units, Weighted-Average Grant Date Fair Value, Beginning Balance $ 9.33 $ 16.35 $ 10.41
Estimated fair value (per share) 2.18 4.86 18.05
Unvested Restricted Stock Units, Weighted-Average Grant Date Fair Value, vested 9.91 11.74 10.93
Unvested Restricted Stock Units, Weighted-Average Grant Date Fair Value, forfeited 8.89 10.94 18.45
Unvested Restricted Stock Units, Weighted-Average Grant Date Fair Value, Ending Balance $ 8.99 $ 9.33 $ 16.35
Unvested Restricted Stock Units, Aggregate Fair Value $ 5,191 $ 23,969 $ 22,670
Restricted Stock Units, Aggregate Fair Value, vested 1,520 3,189 5,521
Unvested Restricted Stock Units, Aggregate Fair Value $ 2,633 $ 5,191 $ 23,969