Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Share-Based Compensation and Other Benefit Plans - Summary of Share-Based Compensation Expense (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2017
tranche
Jun. 30, 2020
USD ($)
shares
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Jun. 30, 2019
USD ($)
$ / shares
shares
Dec. 31, 2019
$ / shares
Dec. 31, 2017
$ / shares
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]              
Share-based compensation | $   $ 1,000 $ 1,000 $ 1,807 $ 2,055    
Defined Contribution Plan, Cost | $   200 100   300    
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    
Performance Restricted Stock Units [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   87,899 0 87,899 0    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate       101.32%   49.90%  
Share-based Compensation Arrangements By Share-based Payment Award, Award Amortization Period       5 years      
Shares, Issued   3,895   3,895      
Share-based Compensation Arrangements By Share-based Payment Award, Performance Period 3 years            
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   201,491   201,491      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum       0.51%   1.66% 1.44%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum             1.51%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   161,044   161,044      
Performance Restricted Stock Units [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             59.63%
Share-based Compensation Arrangements By Share-based Payment Award, Number Of Award Tranches | tranche 2            
Share-based Compensation Arrangement by Share-based Payment Award, Shares, Expected to Vest, Percentage       0.00%      
Performance Restricted Stock Units [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             62.18%
Share-based Compensation Arrangements By Share-based Payment Award, Number Of Award Tranches | tranche 3            
Share-based Compensation Arrangement by Share-based Payment Award, Shares, Expected to Vest, Percentage       200.00%      
Performance Restricted Stock Units [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 | $ / shares       $ 2.40   $ 34.02  
Performance Restricted Stock Units [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 | $ / shares             $ 47.70
Performance Restricted Stock Units [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 | $ / shares             $ 65.28
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   223,882   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   584,497 1,132 584,497 1,132    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares       $ 2.78 $ 43.06    
Shares, Issued   36,174 26,671 36,174 26,671    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   308,813   308,813      
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       2 years      
Restricted Stock Units (RSUs) [Member] | Maximum [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       5 years      
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   1,424,600   1,424,600