Quarterly report [Sections 13 or 15(d)]

Stockholders' Equity (Stock Option Activities) (Details)

v3.26.1
Stockholders' Equity (Stock Option Activities) (Details) - Employee Stock Option - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Options rollforward    
Stock Options, Outstanding, Number, Beginning Balance 1,521  
Options, Outstanding, Number, Ending Balance 1,521 1,521
Options vested and exercisable 951  
Weighted Average Exercise Price    
Weighted Average Exercise Price, Beginning $ 4,297.5  
Weighted Average Exercise Price, Ending 4,297.5 $ 4,297.5
Weighted Average Exercise Price, options vested and exercisable $ 4,297.5  
Weighted Average Remaining Contractual Life, Options outstanding (in years) 1 year 21 days 1 year 3 months 21 days
Weighted Average Remaining Contractual Life, Options vested and exercisable (in years) 1 year 21 days  
Unrecognized share-based compensation $ 0