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Stock-based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Stock-based Compensation        
Weighted-average grant-date per share fair values granted (in USD per share) $ 0.42 $ 1.72 $ 1.36 $ 4.29
Stock-based options forfeited (in shares) 2,562,180   2,078,034  
Future compensation cost for awards not vested $ 3.7   $ 7.2  
Weighted-average period compensation cost of unvested awards to be expensed (in years) 2 years 3 months 18 days   2 years 6 months  
Two Thousand Fourteen Stock Incentive Plan        
Stock-based Compensation        
Terms (in years) 10 years   10 years  
Vesting period (in years) 4 years   4 years  
Shares available for issuance (in shares) 5,600,000   4,800,000  
Two Thousand Fourteen Employee Stock Purchase Plan        
Stock-based Compensation        
Shares available for issuance (in shares) 200,000   200,000  
Discount to the market price (as a percent) 15.00%   15.00%  
Cash Preservation Plan, 2025        
Stock-based Compensation        
Stock-based options forfeited (in shares) 2,600,000      
Stock options | Two Thousand Seventeen Stock Incentive Plan        
Stock-based Compensation        
Terms (in years) 10 years   10 years  
Vesting period (in years) 4 years   4 years