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Stockholders' Equity - Estimates Utilized (Details) - Stock Option - $ / shares
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair value of options issued (in dollars per share) $ 0.77 $ 4.18
Exercise price (USD per share) $ 0.95 $ 5.39
Expected life of options (in years) 6 years 1 month 6 days 6 years 2 months 12 days
Risk-free interest rate 3.00% 0.80%
Expected volatility 104.00% 96.50%
Dividend yield 0.00% 0.00%