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Stock-Based Compensation - Non-Vested Common Stock Grants (Details) - Restricted Stock - $ / shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award      
Granted shares 1,175 22,052  
Less: Forfeited shares 400    
Less: Vested shares 25,753    
Outstanding shares 189,517   214,495
Granted (fair value) $ 8.75 $ 16.54  
Less: Forfeited (fair value) 16.54    
Less: Vested (fair value) 16.67    
Outstanding (fair value) $ 17.55   $ 17.49