Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Class A Common Stock (Detail)

v3.5.0.2
Stockholders' Equity - Class A Common Stock (Detail) - Class A Common Stock - shares
1 Months Ended
Aug. 31, 2016
Mar. 31, 2016
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
Class Of Stock [Line Items]            
Common stock, shares outstanding     8,049,025 7,989,749 7,913,000 7,768,000
Issuance of Class A common Stock upon conversion of Class B units to Class A common stock 21,200 38,076        
Common stock conversion date Aug. 31, 2016 Mar. 31, 2016