Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.21.2
Stock-Based Compensation (Details) - USD ($)
3 Months Ended 9 Months Ended
May 26, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Stock-based compensation expense   $ 1,241,000 $ 1,572,000 $ 4,568,000 $ 3,391,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 6,100   $ 6,100  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition       1 year 9 months 18 days  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate       0.00%  
Expected dividend rate       0.00%  
Long-Term Awards [Member]          
Share based compensation maximum percentage of target that may be earned       200.00%  
Performance period       3 years  
Long-Term Awards [Member] | Annual Award Agreements [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period       8  
Long Term Incentives Plan Units [Member]          
Share based compensation maximum percentage of target that may be earned       150.00%  
Long Term Incentives Plan Units [Member] | 2016 Equity Incentive Plan [Member]          
Additional shares authorized for issuance 1,500,000        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   1,469,000   1,469,000  
Long Term Incentives Plan Units [Member] | Long Term Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period       17,000  
Long Term Incentives Plan Units [Member] | Annual Award Agreements [Member]          
Share Based Compensation Estimated Percentage Of Performance Goals   105.00%   105.00%  
Performance period       1 year  
Long Term Incentives Plan Units [Member] | Long Term Incentive Plan 2020 [Member]          
Vesting percentage       50.00%  
Share-based Compensation Award, Tranche One [Member] | Long-Term Awards [Member]          
Share Based Compensation Estimated Percentage Of Performance Goals   75.00%   75.00%  
Share-based Compensation Award, Tranche One [Member] | Long Term Incentives Plan Units [Member]          
Vesting percentage       50.00%  
Share-based Compensation Award, Tranche One [Member] | Long Term Incentives Plan Units [Member] | 2018 Program [Member]          
Vesting percentage       50.00%  
Share-based Compensation Award, Tranche One [Member] | Long Term Incentives Plan Units [Member] | Annual Award Agreements [Member] | Independent Directors [Member]          
Vesting percentage       100.00%  
Share-based Compensation Award, Tranche One [Member] | Long Term Incentives Plan Units [Member] | Long Term Incentive Plan 2020 [Member]          
Vesting percentage       50.00%  
Share-based Compensation Award, Tranche Two [Member] | Long-Term Awards [Member]          
Share Based Compensation Estimated Percentage Of Performance Goals   25.00%   25.00%  
Share-based Compensation Award, Tranche Two [Member] | Long Term Incentives Plan Units [Member]          
Vesting percentage       50.00%  
Share-based Compensation Award, Tranche Two [Member] | Long Term Incentives Plan Units [Member] | 2018 Program [Member]          
Vesting percentage       50.00%