Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Class A Redeemable Convertible Preferred Stock - Schedule of Originally Issued and Remaining Series A Preferred Stock Accretion to Ten Year Liquidation Value (Parenthetical) (Detail)

v3.6.0.2
Class A Redeemable Convertible Preferred Stock - Schedule of Originally Issued and Remaining Series A Preferred Stock Accretion to Ten Year Liquidation Value (Parenthetical) (Detail) - shares
Dec. 31, 2016
Dec. 22, 2016
Dec. 31, 2015
Temporary Equity [Line Items]      
Temporary equity, shares outstanding 6,600,000   14,666,667
Series A Redeemable Convertible Preferred Stock [Member]      
Temporary Equity [Line Items]      
Temporary equity, shares outstanding 6,600,000 6,600,000 14,666,667