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Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation cost not yet recognized $ 8,695   $ 8,695  
Stock-based compensation expense $ 1,320 $ 2,311 $ 2,402 $ 4,807
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     3 years  
Market performance thresholds period     3 years  
Restricted Stock Units (RSUs) | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance target, percentage     0.00%  
Restricted Stock Units (RSUs) | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance target, percentage     100.00%  
Restricted Stock Units (RSUs) | Director        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     1 year  
Restricted Stock Units (RSUs) | 2015 Incentive Award Plan | 2015 Incentive Award Plan approved on June 19, 2015        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (shares) 3,000,000   3,000,000  
Number of shares available for grant (shares) 1,044,738   1,044,738