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Equity Incentive Plans - Stock Options Outstanding (Details)
6 Months Ended 12 Months Ended
Jun. 30, 2021
$ / shares
shares
Dec. 31, 2020
$ / shares
shares
Number of Stock Options    
Beginning Balance (shares) | shares 2,214,193  
Forfeited (shares) | shares (41,090)  
Exercised (shares) | shares (138,605)  
Ending Balance (shares) | shares 2,034,498 2,214,193
Exercisable (shares) | shares 2,017,419  
Weighted Average Grant Date Fair Value    
Beginning Balance (usd per share) $ 4.01  
Forfeited (usd per share) 3.96  
Exercised (usd per share) 3.92  
Ending Balance (usd per share) 4.01 $ 4.01
Exercisable (usd per share) 4.01  
Weighted Average Exercise Price    
Beginning Balance (usd per share) 13.94  
Forfeited (usd per share) 13.62  
Exercised (usd per share) 13.78  
Ending Balance (usd per share) 13.96 $ 13.94
Exercisable (usd per share) $ 13.94  
Weighted Average Contractual Life (years)    
Outstanding 3 years 5 months 23 days 3 years 11 months 15 days
Exercisable 3 years 5 months 19 days