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Stockholders' Equity - Warrants (Details) - $ / shares
 3 Months Ended 6 Months Ended
Mar. 31, 2021
Jun. 30, 2021
Number of Warrants    
Balance of warrants outstanding at the end of the period (in shares)   4,490,159
Exercised (in shares)   (770,833)
Balance of warrants outstanding at the beginning of the period (in shares) 5,260,992 5,260,992
Weighted Average Exercise Price Per Share    
Weighted average exercise price of warrants at the beginning of the period (in USD per share) $ 5.19 $ 5.19
Exercised (in USD per share)   1.64
Weighted average exercise price of warrants at the end of the period (in USD per share)   $ 5.80
Term    
Weighted-Average Remaining Contractual Term 4 years 1 month 6 days 3 years 6 months