Subsequent Events - Additional Information (Details) - shares		9 Months Ended
	Nov. 03, 2017	Sep. 30, 2017	Dec. 31, 2016
Class A Voting Common Stock
Subsequent Event [Line Items]
Common stock, shares issued		21,822,015	21,822,015
Common stock, shares outstanding		21,822,015	21,822,015
Series B Convertible Participating Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares outstanding		2,684,632	0
Preferred stock, shares issued		2,684,632	0
Series A-1 Convertible Participating Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares outstanding		5,543	0
Preferred stock, shares issued		5,543	0
Conversion of Series B Convertible Preferred Stock
Subsequent Event [Line Items]
Common stock, conversion basis		one-to-one basis
Conversion of Series B Convertible Preferred Stock | Subsequent Event | Class A Voting Common Stock
Subsequent Event [Line Items]
Shares issued upon conversion	2,684,632
Common stock, shares issued	24,506,647
Common stock, shares outstanding	24,506,647
Conversion of Series B Convertible Preferred Stock | Subsequent Event | Series B Convertible Participating Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares outstanding	0
Conversion of Series A-2 Convertible Participating Preferred Stock
Subsequent Event [Line Items]
Preferred stock, conversion basis		one-to-one basis
Conversion of Series A-2 Convertible Participating Preferred Stock | Subsequent Event | Series A-1 Convertible Participating Preferred Stock
Subsequent Event [Line Items]
Shares issued upon conversion	76,577
Preferred stock, shares outstanding	82,120
Preferred stock, shares issued	82,120
Conversion of Series A-2 Convertible Participating Preferred Stock | Subsequent Event | Series A-2 Convertible Participating Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares outstanding	0