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SHAREHOLDERS' EQUITY - Black-Scholes pricing model (Details) - $ / shares
12 Months Ended
Dec. 31, 2025
Dec. 31, 2023
Principal assumptions used in applying the Black-Scholes option pricing model for the awards    
Risk-free interest rate (as a percent) 3.67% 4.44%
Dividend yield (as a percent) 0.00% 0.00%
Volatility factor of the expected market price of common stock (as a percent) 61.00% 67.00%
Weighted-average expected life of option 3 years 3 years
Weighted-average grant date fair value (in dollars per share) $ 4.7 $ 3.36