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Stockholders' Equity - Schedule of Warrants (Details) - $ / shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jun. 15, 2020
Number of Warrants        
Balance of warrants outstanding at the beginning of the period (in shares) 5,260,992 10,589,482    
Granted (in shares)   5,831,451    
Exercised (in shares) (770,833) (11,159,941)    
Balance of warrants outstanding at the end of the period (in shares) 4,490,159 5,260,992 10,589,482  
Weighted-Average Exercise Price Per Share        
Weighted average exercise price of warrants at the beginning of the period (in dollars per share) $ 5.19 $ 4.08    
Granted (in dollars per share)   1.70    
Exercised (in dollars per share) 1.64 2.31    
Weighted average exercise price of warrants at the end of the period (in dollars per share) $ 5.80 $ 5.19 $ 4.08  
Weighted-Average Remaining Contractual Term        
Weighted-Average Remaining Contractual Term 3 years 4 years 1 month 6 days 3 years 8 months 12 days  
Exercise price of warrants (in dollars per share) $ 0.01     $ 3.05
Pre-Funded Warrants        
Number of Warrants        
Balance of warrants outstanding at the beginning of the period (in shares) 605,072      
Granted (in shares) 386,967      
Exercised (in shares) (992,039)      
Balance of warrants outstanding at the end of the period (in shares)   605,072