Annual report [Section 13 and 15(d), not S-K Item 405]

Stockholders' Equity (Stock Option Activities) (Details)

v3.26.1
Stockholders' Equity (Stock Option Activities) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award    
Options vested and expected to vest, Number of shares 558,896  
Number of shares, Exercised 0 0
Number of shares, Forfeited (540,000)  
Number of shares, Expired (18,896)  
Options vested and expected to vest, Number of shares   558,896
Options vested and expected to vest, Weighted average exercise price $ 2.32  
Weighted average exercise price, Forfeited 1.68  
Weighted average exercise price, Expired $ 20.55  
Options vested and expected to vest, Weighted average exercise price   $ 2.32
Total weighted average intrinsic value, Options vested and expected to vest $ 186,300  
Total weighted average intrinsic value, Options vested and expected to vest   $ 186,300
Options vested and expected to vest, Weighted average contractual life   6 years 7 days
Stock options, unrecognized compensation expense 0 $ 400,000
Share-based compensation, period for recognition of expense   3 years 2 months 12 days
Parent Company And Its Subsidiaries    
Share-based Compensation Arrangement by Share-based Payment Award    
Stock options, unrecognized compensation expense $ 1,300,000 $ 1,000,000
Share-based compensation, period for recognition of expense 1 year 4 months 24 days 2 years 1 month 6 days