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Employee and Consultant Equity-Based Compensation - RSU and SG Activity (Details) - RSU's and SG's - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of Shares      
Beginning balance (shares) 76,000 24,150  
Granted (shares) 11,000 76,000  
Forfeited (shares) (60,500) 0  
Vested/Released (shares) (12,168) (24,150)  
Ending balance (shares) 14,332 76,000 24,150
Weighted Average Grant Date Fair Value per Share      
Beginning balance (dollars per share) $ 18.70 $ 20.91  
Granted (dollars per share) 20.32 17.33 $ 22.40
Forfeited (dollars per share) 19.74 0  
Vested/released (dollars per share) 17.43 16.58  
Ending balance (dollars per share) $ 16.66 $ 18.70 $ 20.91