Annual report pursuant to Section 13 and 15(d)

Compensation Plans (Details)

v3.20.1
Compensation Plans (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Aug. 20, 2019
Apr. 23, 2019
May 02, 2018
Dec. 31, 2019
Dec. 31, 2018
Apr. 17, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise price (in dollars per share) $ 6.42          
Options granted (in shares) 477,500          
Share-based payment arrangement, expense       $ 6.9    
Unrecognized compensation expense related to unvested stock options       $ 3.0    
Unrecognized compensation expense related to unvested stock options weighted-average period       4 years 2 months 12 days    
Weighted average grant date fair value (in dollars per share)       $ 6.70    
Options vested in period, fair value       $ 0.1    
Unrecognized compensation expense related to unvested common units       $ 5.2    
Unrecognized compensation expense related to unvested common units weighted-average period       2 years 2 months 12 days    
Employer matching contribution, percent       3.00%    
Defined contribution plan, percent of match       50.00%    
Employer matching contribution, annual vesting percentage       33.00%    
Term of service required for full vesting       3 years    
Employer safe harbor matching contribution, percent       100.00%    
Defined contribution plan, cost       $ 0.3 $ 0.2  
Stock option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options granted (in shares)       654,284 0  
Share-based payment arrangement, expense       $ 1.1    
Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period 5 years 0 years        
Employer matching contribution, percent       3.00%    
Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period 10 years 4 years        
Employer matching contribution, percent       5.00%    
IPO            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options granted, net (in shares)     176,784      
Exercise price (in dollars per share)     $ 17.00      
Equity Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized (in shares)           5,000,000