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Stockholders' Equity - Estimates Utilized (Details) - Stock Option
3 Months Ended
Mar. 31, 2022
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Fair value of options issued (USD per share) $ 1.17
Exercise price (USD per share) $ 1.48
Expected life of options (in years) 6 years 1 month 6 days
Risk-free interest rate 1.90%
Expected volatility 99.20%
Dividend yield 0.00%