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Equity - Equity Incentive Plan Assumptions (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Equity    
Expected life 6 years 3 days 6 years 11 months 23 days
Weighted average volatility 91.89% 76.50%
Weighted average risk-free interest rate 0.59% 1.26%
Expected dividend rate 0.00% 0.00%