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Stock Option Plan - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Jan. 01, 2025
Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 169,570 55,500    
Exercise of stock options (in shares) 108      
Shares were issued under the ESPP (in shares) 157,339      
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options, unrecognized compensation cost $ 0.5      
Stock options, cost not yet recognized, remaining weighted average vesting period 2 years 6 months      
Aggregate intrinsic value $ 0.0 $ 0.3    
Stock options | 2019 Incentive Award Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options, expiration period 10 years      
Stock options, vesting period 4 years      
Increase (decrease) in number of shares authorized (in shares)     705,613  
Employee stock purchase plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized, percentage 1.00%      
Increase (decrease) in number of shares authorized (in shares)     176,403  
Common stock reserved for future issuance (in shares) 542,808      
Maximum employee payroll deduction percentage 20.00%      
Employee stock purchase plan | 2019 Incentive Award Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized, percentage 4.00%      
Common Shares Available For Grant Under The 2019 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock reserved for future issuance (in shares) 2,411,086      
Restricted stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unvested shares outstanding (in shares) 1,764,912     1,710,373
Aggregate intrinsic value, vested $ 1.9 $ 0.5    
Awards granted (in dollars per share) $ 4.76 $ 2.09    
Stock options, unrecognized compensation cost $ 4.8      
Stock options, cost not yet recognized, remaining weighted average vesting period 2 years 7 months 6 days