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Stock-Based Compensation - Stock option activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Number of Options    
Options outstanding at beginning of the year 2,336,020  
Options granted 220,000  
Options expired (92,562)  
Options outstanding at end of the year 2,463,458 2,336,020
Options exercisable at end of the year 1,994,267  
Weighted Average Exercise Price    
Options outstanding at beginning of the year (in dollars per share) $ 11.39  
Options granted (in dollars per share) 2.09  
Options expired (in dollars per share) 10.12  
Options outstanding at end of the year (in dollars per share) 10.61 $ 11.39
Options exercisable at end of year (in dollars per share) $ 12.08  
Additional disclosures    
Options outstanding, Weighted average remaining contractual life (in years) 7 years 7 years 3 months 18 days
Options exercisable, Weighted average remaining contractual life (in years) 6 years 7 months 6 days  
Options outstanding, Aggregate intrinsic value $ 245 $ 1,298
Options exercisable, Aggregate intrinsic value $ 238