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Intangible Assets - Expected remaining amortization expense (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Intangible Assets    
2025 (remaining three months) $ 16  
2026 63  
2027 63  
2028 63  
2029 63  
Thereafter 70  
Total intangible assets, net $ 338 $ 385