Annual report pursuant to Section 13 and 15(d)

Equity - Summary of Authorized and Outstanding Equity (Parenthetical) (Detail)

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Equity - Summary of Authorized and Outstanding Equity (Parenthetical) (Detail) - $ / shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Class Of Stock [Line Items]    
Preferred stock, par value $ 0.01 $ 0.01
Class A Common Stock    
Class Of Stock [Line Items]    
Common stock, par value $ 0.01 $ 0.01
Common stock, voting rights one vote for each share  
Common stockholders rights percentage 100.00%  
Restricted stock units granted 14,318 8,242
Restricted stock units unvested 21,704  
Common stock, shares outstanding 9,869,101 9,650,692
Class B Common Stock    
Class Of Stock [Line Items]    
Common stock, par value $ 0.01 $ 0.01
Common stock, voting rights one vote for each share  
Restricted stock units granted 170,854  
Class of share exchangeable to another class one-for-one basis  
Common stock, shares outstanding 4,593,687 4,721,646