Quarterly report pursuant to Section 13 or 15(d)

Equity - Class B Common Stock (Detail)

v3.21.2
Equity - Class B Common Stock (Detail) - Class B Common Stock - shares
 1 Months Ended 3 Months Ended
Jun. 30, 2021
May 31, 2021
Mar. 31, 2021
Jan. 31, 2021
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Class Of Stock [Line Items]                    
Common stock, shares outstanding 4,781,844   4,770,000   4,781,844 4,770,000 4,852,000 4,855,000 4,721,646 5,031,000
Issuance of Class B common stock upon vesting of restricted stock units       34,196 2,000 56,000        
Cancellation of Class B common stock upon conversion of Class B units to Class A common stock         11,000 8,000 12,000 176,000    
Common stock conversion date       2021-01            
Neosho                    
Class Of Stock [Line Items]                    
Issuance of Class B common stock in connection with the Neosho Acquisition 1,740                  
Common stock conversion date 2021-06                  
Restricted Stock                    
Class Of Stock [Line Items]                    
Issuance of Class B common stock upon vesting of restricted stock units   20,876   21,598            
Common stock conversion date   2021-05   2021-01            
Resale And Registration Rights Agreement                    
Class Of Stock [Line Items]                    
Cancellation of Class B common stock upon conversion of Class B units to Class A common stock (5,864) (4,743) (7,605)              
Common stock conversion date 2021-06 2021-05 2021-03