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Share-Based Compensation - Restricted Stock Awards (Details) - Restricted stock awards - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Number of Shares    
Outstanding at beginning of period (in shares) 38,400 37,400
Granted (in shares) 0 1,000
Outstanding at end of period (in shares) 38,400 38,400
Weighted-Average Exercise Price Per Share    
Weighted-Average Exercise Price Per Share, Outstanding (in dollars per share) $ 16.53 $ 16.60
Weighted-Average Exercise Price Per Share, Granted (in dollars per share) 0 13.72
Weighted-Average Exercise Price Per Share, Outstanding (in dollars per share) $ 16.53 $ 16.53