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Redeemable Class A units, Members' Equity, and Stockholders' Equity - Additional Information (Details) - USD ($)
 12 Months Ended
Oct. 30, 2020
Sep. 23, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Class Of Stock [Line Items]          
Preferred stock, authorized     50,000,000    
Preferred stock, par value     $ 0.01    
Description of common stock voting rights     Holders of Class A and Class B common stock are entitled to one vote per share on all matters to be voted upon by the stockholders. Holders of our Class A common stock and Class B common stock will vote together as a single class on all matters (including the election of directors) submitted to a vote of stockholders, unless otherwise required by law.    
Common stock, terms of conversion features     Holders of our Class B common stock are not entitled to receive dividends and will not be entitled to receive any distributions upon the liquidation, dissolution or winding up of the Company. Shares of our Class B common stock are issuable only in connection with the corresponding issuance of an equal number of Class B-1 units. Shares of Class B common stock may only be issued to the extent necessary to maintain the one-to-one ratio between the Class B-1 unit held by the non-controlling interest holders and the number of shares of Class B common stock held by the noncontrolling interest holders. Shares of Class B common stock are transferable only together with an equal number of LLC Interests. Each share of our Class B common stock will be redeemed and cancelled by us if the holder exchanges one Class B-1 unit, together with the corresponding share of Class B common stock, for one share of Class A common stock (or, at our election, cash of an equivalent value).    
Common stock, conversion basis     We must, at all times, maintain a one-to-one ratio between the number of outstanding shares of Class A common stock and the number of Class A-1 unit owned by us (subject to certain exceptions for treasury shares and shares underlying certain convertible or exchangeable securities).    
Proceeds from initial public offering, net of underwriting discounts and commissions     $ 12,200,000 $ 0.0 $ 0.0
QL Holdings LLC | QL Holdings LLC and Subsidiaries          
Class Of Stock [Line Items]          
Borrowings   $ 210,000,000      
Class B-1 Units | QL Holdings LLC and Subsidiaries          
Class Of Stock [Line Items]          
Common stock held by subsidiary 41,620        
Ownership percentage 43.50%        
Conversion of redeemable convertible preferred units     284,221    
Class A | QL Holdings LLC and Subsidiaries          
Class Of Stock [Line Items]          
Members' capital, outstanding       1,136,842  
Initial Public Offering (IPO) | QL Holdings LLC and Subsidiaries | Intermediate Holdco          
Class Of Stock [Line Items]          
Proceeds from initial public offering, net of underwriting discounts and commissions     $ 16,300,000    
Initial Public Offering (IPO) | QL Holdings LLC and Subsidiaries | Intermediate Holdco | 2020 Term Loan Facility          
Class Of Stock [Line Items]          
Proceeds from initial public offering, net of underwriting discounts and commissions     23,600,000    
Initial Public Offering (IPO) | Class B-1 Units          
Class Of Stock [Line Items]          
Number of shares repurchased 4,772,449        
Initial Public Offering (IPO) | Class B-1 Units | Intermediate Holdco          
Class Of Stock [Line Items]          
Proceeds from initial public offering, net of underwriting discounts and commissions     $ 84,300,000    
Number of shares repurchased     4,772,449    
Preferred Stock          
Class Of Stock [Line Items]          
Preferred stock, authorized     50,000,000    
Preferred stock, par value     $ 0.01    
Class A Common          
Class Of Stock [Line Items]          
Common stock, authorized     1,000,000,000    
Common stock, par value     $ 0.01    
Common stock, outstanding     33,400,000    
Class A Common | Initial Public Offering (IPO)          
Class Of Stock [Line Items]          
Shares issued 7,027,606        
Public offering price, per share $ 19.00        
Proceeds from initial public offering, net of underwriting discounts and commissions $ 124,200,000        
Class A Common | Underwriters' Over-allotment Option          
Class Of Stock [Line Items]          
Shares issued 769,104        
Class B Common          
Class Of Stock [Line Items]          
Common stock, authorized     100,000,000    
Common stock, par value     $ 0.01    
Common stock, outstanding 25,536,043   25,500,000    
Redeemable Class A | QL Holdings LLC and Subsidiaries          
Class Of Stock [Line Items]          
Redeemable units       284,211