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Stock-Based Compensation - Stock Options - Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Number of Shares Outstanding      
Outstanding as of beginning of year (in shares) 296,391    
Granted (in shares) 45,090    
Exercised (in shares) 0 (2,260)  
Forfeited (in shares) (21,988)    
Outstanding as of end of period (in shares) 319,493   296,391
Weighted Average Exercise Price      
Outstanding as of beginning of year (in dollars per share) $ 50.5    
Granted (in dollars per share) 4.89    
Forfeited (in dollars per share) 112.14    
Outstanding as of end of period (in dollars per share) $ 38.12   $ 50.5
Additional Information      
Weighted average remaining contractual life, outstanding 7 years 6 months 14 days   7 years 11 months 19 days
Aggregate intrinsic value, outstanding $ 40   $ 26
Number of shares outstanding, vested and exercisable (in shares) 182,079    
Weighted average exercise price, vested and exercisable (in dollars per share) $ 51.15    
Weighted average remaining contractual life, vested and exercisable 6 years 6 months 3 days