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Stock-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
equityCompensationPlan
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
Sep. 30, 2022
USD ($)
equityCompensationPlan
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
Dec. 31, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation expense | $ $ 18.0   $ 18.0    
Unrecognized compensation expense related to options outstanding, weighted average period for expense to be recognized     2 years    
Number of equity compensation plans | equityCompensationPlan 2   2    
Options outstanding (in shares) 11,726,937   11,726,937   10,086,167
Options, grants in period, weighted average grant date fair value (in USD per share) | $ / shares $ 2.01 $ 5.97 $ 3.19 $ 2.77  
Options, vested in period, fair value | $ $ 0.6 $ 0.1 $ 4.6 $ 0.7  
2014 Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized for grant (in shares) 800,000   800,000    
2019 Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized for grant (in shares) 19,500,000   19,500,000    
Share-based Payment Arrangement, Performance Based Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options outstanding (in shares) 900,000   900,000   1,200,000
Options not yet exercisable (in shares) 700,000   700,000   900,000