Quarterly report [Sections 13 or 15(d)]

Fair Value Measurements (Common Stock Warrant Liabilities) (Details)

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Fair Value Measurements (Common Stock Warrant Liabilities) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Fair Value Measurements    
Common Stock Warrant liabilities at beginning of period $ 1  
Common Stock Warrant liabilities at end of period 0 $ 1
Common Stock Warrant    
Fair Value Measurements    
Common Stock Warrant liabilities at beginning of period 1 214
Common Stock Warrant liabilities at end of period   1
Checkpoint | Common Stock Warrant    
Fair Value Measurements    
Change in fair value of common stock warrants   108
Deconsolidation of common stock warrants   (306)
Avenue | Common Stock Warrant    
Fair Value Measurements    
Change in fair value of common stock warrants $ (1) $ (15)