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Stock Options and Restricted Shares - Summary of Stock Option Activity (Details) - Employee Stock Option [Member] - USD ($)
9 Months Ended
Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Options, Outstanding at January 1, 2021, (in shares) 5,906,884
Number of Options, Granted (in shares) 750,000
Number of Options, Exercised (in shares) (1,546,288)
Number of Options, Forfeited/Expired (in shares) (20,000)
Number of Options, Outstanding at September 30, 2021, (in shares) 5,090,596
Number of Options Exercisable at September 30, 2021 (in shares) 3,468,912
Number of Options, Vested and Expected to Vest at September 30, 2021 (in shares) 5,090,596
Weighted Average Exercise Price Outstanding (in dollars per shares) $ 1.61
Weighted Average Exercise Price Granted (in dollars per shares) 6.76
Weighted Average Exercise Price Exercised (in dollars per shares) 2.01
Weighted Average Exercise Price Forfeited/Expired (in dollars per shares) 1.38
Weighted Average Exercise Price Outstanding (in dollars per shares) 2.05
Weighted Average Exercise Price Exercisable at September 30, 2021 (in dollars per shares) 1.73
Weighted Average Exercise Price Vested and Expected to Vest at September 30, 2021 (in dollars per shares) $ 2.05
Weighted Average Remaining Contractual Term Outstanding (in years) 7 years 5 months 26 days
Weighted Average Remaining Contractual Term Exercisable at September 30, 2021 (in years) 7 years 10 days
Weighted Average Remaining Contractual Term Vested and Expected to Vest at September 30, 2021 (in years) 7 years 5 months 26 days
Aggregate Intrinsic Value, Outstanding at September 30, 2021 $ 37,037,015
Aggregate Intrinsic Value, Exercisable at September 30, 2021 27,069,483
Aggregate Intrinsic Value, Vested and Expected to Vest at December 31, 2020 $ 37,037,015