Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Class A Common Stock (Detail)

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Stockholders' Equity - Class A Common Stock (Detail) - Class A Common Stock - shares
1 Months Ended
May. 31, 2015
Apr. 30, 2015
Mar. 31, 2015
Class Of Stock [Line Items]      
Issuance of Class A common Stock upon conversion of Class B units to Class A common stock 50,000 11,246 18,000
Common stock conversion date May 31, 2015 Apr. 30, 2015 Mar. 31, 2015