v3.26.1
Summary of Significant Accounting Policies - Segment information (Details)
3 Months Ended
Mar. 31, 2026
USD ($)
segment
Dec. 31, 2025
USD ($)
Summary of Significant Accounting Policies    
Number of operating segments | segment 1  
Number of reportable segments | segment 1  
United States    
Summary of Significant Accounting Policies    
Long-lived assets | $ $ 51,000 $ 58,000
Spain    
Summary of Significant Accounting Policies    
Long-lived assets | $ $ 143,000 $ 164,000