Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation and Other Benefit Plans - Summary of Share-Based Compensation Expense (Details)

v3.21.2
Share-Based Compensation and Other Benefit Plans - Summary of Share-Based Compensation Expense (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based compensation   $ 1,000 $ 3,208 $ 1,807    
Defined Contribution Plan, Cost $ 100 200 $ 300 400    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount     22,800,000      
Other Pension, Postretirement and Supplemental Plans [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Pension and Other Postretirement Benefits Cost (Reversal of Cost) $ 100 $ 100 $ 100 $ 100    
Time Vested Restricted Stock Units - Employees [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 118,223 223,882 118,223 223,882    
Restricted Stock Units (RSUs) [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 760,220   760,220      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 13.84 $ 2.78    
Shares, Issued 105,038 36,174 105,038 36,174    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 273,962   273,962      
Restricted Stock Units (RSUs) [Member] | Minimum [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangements By Share-based Payment Award, Award Amortization Period     1 year      
Performance Shares [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 282,706 87,899 282,706 87,899    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate     134.74%     49.90%
Shares, Issued 6,800 3,895 6,800 3,895    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate     0.00%   0.00% 0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 484,197   484,197      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum     0.22%   0.18% 1.66%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum     0.29%   0.51%  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 351,518   351,518      
Performance Shares [Member] | Minimum [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate     131.74%   101.32%  
Share-based Compensation Arrangement by Share-based Payment Award, Shares, Expected to Vest, Percentage     0.00%      
Performance Shares [Member] | Maximum [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate         117.71%  
Share-based Compensation Arrangements By Share-based Payment Award, Award Amortization Period     3 years      
Share-based Compensation Arrangement by Share-based Payment Award, Shares, Expected to Vest, Percentage     200.00%      
Performance Shares [Member] | Year 1 [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value           $ 34.02
Performance Shares [Member] | Year 1 [Member] | Minimum [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 17.74   $ 2.40  
Performance Shares [Member] | Year 1 [Member] | Maximum [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 33.31   $ 16.02  
Change in Control            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based compensation $ 1,900          
Restricted Stock Units and Performance Stock Units            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   100,000 300,000      
ROCE            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 13.63      
Employees and Directors [Member]            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 4,424,600   4,424,600