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Stock-Based Compensation - Restricted Stock Award Activity (Details) - Restricted Stock Awards - $ / shares
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Number of Shares    
Beginning balance (in shares) 57,448 52,755
Granted (in shares) 44,708 65,959
Forfeited (in shares) (4,266) 0
Vested (in shares) (57,448) (52,755)
Ending balance (in shares) 40,442 65,959
Weighted-Average Grant Date Fair Value    
Beginning balance (in USD per share) $ 11.75 $ 14.69
Granted (in USD per share) 29.30 11.75
Forfeited (in USD per share) 29.30 0
Vested (in USD per share) 11.75 14.69
Ending balance (in USD per share) $ 29.30 $ 11.75