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Share-Based Compensation - Additional Information (Details) - USD ($)
$ in Thousands
5 Months Ended 12 Months Ended
Jun. 10, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation   $ 2,828 $ 1,984 $ 2,529
Nebula Holdings LLC        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based payment arrangement, accelerated cost   $ 2,200    
Class B Unit Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (in shares)   14,241,344    
Accelerated vesting (in shares)   571,983    
Share-based compensation   $ 2,200    
Vested (in shares) 929,160 929,160 1,496,521 1,814,594
Forfeited (in shares)   0 0 2,813
Fair value of the non-option award units that vested   $ 2,700 $ 2,000 $ 2,500
Share-based compensation expense   $ 2,675 $ 1,984 $ 2,572
Class B Unit Incentive Plan | Share-based Payment Arrangement, Tranche One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage   25.00%    
Class B Unit Incentive Plan | Share-based Payment Arrangement, Tranche Two        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage   25.00%    
Class B Unit Incentive Plan | Share-based Payment Arrangement, Tranche Three        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage   25.00%    
Class B Unit Incentive Plan | Share-based Payment Arrangement, Tranche Four        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage   25.00%    
Class B Unit Incentive Plan | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period   3 years    
Class B Unit Incentive Plan | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period   3 years 3 months    
Class B Unit Incentive Plan | Share-based Payment Arrangement, Nonemployee        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (in shares)   995,039    
2020 Stock Option and Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period   4 years    
Common stock, capital shares reserved for future issuance (in shares)   9,693,750    
Percent on number of shares outstanding   10.00%    
Percent of incremental shares on outstanding common stock   4.00%    
Expiration period (in years)   10 years    
Share-based compensation expense   $ 200    
2020 Stock Option and Incentive Plan | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period   4 years    
Vested (in shares)   0    
Forfeited (in shares)   0