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Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Jan. 30, 2020
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance-based restricted stock granted (in shares)   568,900    
Weighted average fair value per share (in dollars per share)   $ 5.95   $ 6.60
Performance Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance-based restricted stock granted (in shares)   1,043,800    
Weighted average fair value per share (in dollars per share)   $ 7.65   $ 10.51
2014 Plan | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized to be issued under the plan (in shares)   6,400,000    
Unrecognized compensation expense related to unvested stock   $ 8.0    
Weighted average remaining vesting period of unrecognized compensation expense   1 year 15 days    
Stock-based compensation expense   $ 1.7 $ 1.6  
2014 Plan | Restricted Stock Units | Bold Contribution Agreement | Class A Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares of common stock that each holder has contingent right to receive (in shares)   1    
2014 Plan | Performance Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense   $ 1.0 $ 0.6  
Performance-based restricted stock granted (in shares) 1,043,800      
Risk-free interest rate   1.40%    
Expected volatility (as a percent)   62.00%    
Weighted average fair value per share (in dollars per share)   $ 5.36    
Unrecognized compensation expense related to PSU awards   $ 9.7    
Remaining vesting period of unrecognized compensation expense (in years)   1 year 2 months 5 days    
Minimum | Performance Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Relative total shareholder return, percentage 0.00%      
Relative total shareholder return, cash issued, percentage 100.00%      
Maximum | Performance Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Relative total shareholder return, percentage 200.00%