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Stockholders' Equity - Weighted Average Assumptions of Fair Value Options Using Black-Scholes Option-Pricing Model (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Option-Pricing Model Weighted Average Assumptions        
Dividend yield (percent) 0.00% 0.00% 0.00% 0.00%
Risk-free interest rate, minimum (percent) 2.81% 0.77% 1.62% 0.46%
Risk-free interest rate, maximum (percent) 3.38% 0.84% 3.38% 0.84%
Expected life (in years) 5 years 5 years 5 years 5 years
Historical volatility, minimum (percent) 57.82% 54.31% 53.87% 53.94%
Historical volatility, maximum (percent) 58.91% 54.55% 58.91% 54.55%