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Stockholders' Equity - Outstanding Warrants (Details) - Common stock warrants
6 Months Ended
Jun. 30, 2022
$ / shares
shares
Common Stock Warrants  
Warrants Outstanding (in shares) | shares 1,530,176
Weighted Average  
Common Stock Warrants  
Exercise Price (in dollars per share) | $ / shares $ 41.75
Weighted average life (in years) 3 years 6 months 18 days
Warrants Issued in 2018  
Common Stock Warrants  
Warrants Outstanding (in shares) | shares 699,962
Exercise Price (in dollars per share) | $ / shares $ 72.00
Warrants Issued in 2019  
Common Stock Warrants  
Warrants Outstanding (in shares) | shares 331,858
Exercise Price (in dollars per share) | $ / shares $ 37.50
Warrants Issued In 2021  
Common Stock Warrants  
Warrants Outstanding (in shares) | shares 498,356
Exercise Price (in dollars per share) | $ / shares $ 2.10