Stockholders' Equity - Additional Information (Details)		9 Months Ended
	Jun. 30, 2009 $ / shares shares	Sep. 30, 2016 $ / shares shares	Dec. 31, 2015 $ / shares shares
Class Of Stock [Line Items]
Preferred stock, shares authorized		10,000,000	0
Preferred stock, par value | $ / shares		$ 0.001	$ 0.001
Preferred stock, shares outstanding		0	0
Common stock, shares authorized		100,000,000	100,000,000
Common stock, par value | $ / shares		$ 0.001	$ 0.001
Common stock, voting rights		Holders of common stock are entitled to one vote per share
Common stock, shares issued		27,148,042	11,106,926
Common stock, shares outstanding		27,148,042	11,106,926
Warrants outstanding		0
Class A Common Stock
Class Of Stock [Line Items]
Shares converted to common stock		1,164,105
Common stock, shares authorized		0	1,164,497
Common stock, par value | $ / shares		$ 0.001	$ 0.001
Common stock, shares issued		0	1,164,105
Common stock, shares outstanding		0	1,164,105
Series A-1 Preferred Stock
Class Of Stock [Line Items]
Preferred stock, shares authorized		0	5,870,914
Preferred stock, par value | $ / shares		$ 0.001	$ 0.001
Preferred stock, shares outstanding		0	5,225,879
Exercise price of warrants, per share | $ / shares		$ 2.49
Exercise of warrant, shares		130,384
Common Stock
Class Of Stock [Line Items]
Conversion of preferred stock into common stock		8,354,963
Conversion of Class A common stock, Shares Issued		1,164,105
Common Stock | Convertible Preferred Stock
Class Of Stock [Line Items]
Stock conversion ratio		1
Common Stock | Class A Common Stock
Class Of Stock [Line Items]
Stock conversion ratio		1
Warrant One
Class Of Stock [Line Items]
Warrant expiration period	10 years
Warrant One | Series A-1 Preferred Stock
Class Of Stock [Line Items]
Number of shares purchased under each warrant	10,029
Exercise price of warrants, per share | $ / shares	$ 2.49
Warrant Two
Class Of Stock [Line Items]
Warrant expiration period	10 years
Warrant expiration period from closing of initial public offering	5 years
Warrant Two | Series A-1 Preferred Stock
Class Of Stock [Line Items]
Number of shares purchased under each warrant	120,355
Exercise price of warrants, per share | $ / shares	$ 2.49