Quarterly report pursuant to Section 13 or 15(d)

Equity - Class A Common Stock (Detail)

v3.19.2
Equity - Class A Common Stock (Detail) - Class A Common Stock - shares
1 Months Ended
Jun. 30, 2019
May 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Class Of Stock [Line Items]              
Common stock, shares outstanding 8,623,720   8,535,000 8,518,096 8,306,000 8,259,000 8,142,000
Issuance of Class A common stock upon conversion of Class B units to Class A common stock 2,386 84,268 17,074        
Issuance of Class A common stock upon vesting of restricted stock units   1,896          
Common stock conversion date Jun. 30, 2019 May 31, 2019 Mar. 31, 2019        
Stock issued upon vesting of restricted stock units, Transaction date   May 31, 2019