XML 56 R44.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Mar. 18, 2021
Jan. 27, 2021
Feb. 18, 2018
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Jul. 20, 2021
Dec. 31, 2020
Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Performance-based restricted stock granted (in shares)           548,100      
Weighted average fair value per share (in dollars per share)       $ 5.34   $ 5.34     $ 5.55
Forfeited in period (in shares)           487,660      
Performance Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense       $ 2.3   $ 3.0      
Performance-based restricted stock granted (in shares)           1,099,800      
Weighted average fair value per share (in dollars per share)       $ 8.42   $ 8.42     $ 7.65
Share-based compensation liability related to 2021 PSUs       $ 3.0   $ 3.0      
Forfeited in period (in shares)           227,500      
Performance Stock Units | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Relative total shareholder return, percentage           200.00%      
Performance Stock Units | Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Relative total shareholder return, percentage           0.00%      
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)       9,400,000   9,400,000      
Unrecognized compensation expense related to unvested stock       $ 5.9   $ 5.9      
Weighted average remaining vesting period of unrecognized compensation expense           11 months 1 day      
Stock-based compensation expense       1.2 $ 1.3 $ 2.7 $ 3.0    
2014 Plan | Restricted Stock Units | Subsequent Event                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares authorized to be issued under the plan (in shares)               12,000,000.0  
2014 Plan | Performance Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense       $ 3.2 $ 1.3 $ 5.0 $ 2.3    
Performance-based restricted stock granted (in shares)   1,099,800 252,500            
Risk-free interest rate           0.30%      
Expected volatility (as a percent)           86.00%      
Weighted average fair value per share (in dollars per share)       $ 10.85   $ 10.85      
Forfeited in period (in shares) 227,500                
Percentage of target achievement 200.00%                
Unrecognized compensation expense related to PSU awards       $ 21.4   $ 21.4      
Remaining vesting period of unrecognized compensation expense (in years)           1 year 2 months 4 days      
2014 Plan | Performance Stock Units | Class A Common Stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Issuance of shares of class A common stock (in shares) 455,000                
Bold Contribution Agreement | 2014 Plan | Restricted Stock Units | 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