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Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award        
Stock-based compensation expense $ 0.5 $ 0.4 $ 1.5 $ 1.2
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Restricted stock granted (in shares)     152,292  
Restricted stock granted, grant date fair value (in dollars per share)     $ 15.39  
Employee restricted stock award, vesting period     2 years  
Non-employee restricted stock award vest grant over period     1 year  
Nonvested restricted shares outstanding (in shares) 144,426   144,426  
Unrecognized compensation cost $ 1.5   $ 1.5  
Unrecognized compensation cost, recognition period     21 months  
Restricted Stock | Grant Date        
Share-based Compensation Arrangement by Share-based Payment Award        
Restricted stock award, vesting percentage     33.33%  
Restricted Stock | First Anniversary        
Share-based Compensation Arrangement by Share-based Payment Award        
Restricted stock award, vesting percentage     33.33%  
Restricted Stock | Second Anniversary        
Share-based Compensation Arrangement by Share-based Payment Award        
Restricted stock award, vesting percentage     33.33%  
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award        
Restricted stock granted (in shares)     10,755  
Restricted stock granted, grant date fair value (in dollars per share)     $ 15.42  
Amended and Restated 2013 Equity Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award        
Number of shares reserved for issuance (in shares) 1,700,000   1,700,000  
Shares available for issuance (in shares) 895,257   895,257  
Long Term Incentive Plan | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award        
Performance period     3 years  
Service period     2 years