Convertible Preferred Stock - Additional Information (Details) - USD ($)		3 Months Ended
	Mar. 10, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Class Of Stock [Line Items]
Adjustments to additional paid in capital, increase in carrying amount of convertible preferred stock			$ 228,000
Offering costs		$ 98,000
Series A Convertible Preferred Stock
Class Of Stock [Line Items]
Conversion of preferred stock, conversion unit	1
Preferred stock, par value	$ 0.0001	$ 0.0001		$ 0.0001
Deemed dividend per share	$ 0.11
Adjustments to additional paid in capital, increase in carrying amount of convertible preferred stock	$ 228,000
Series B Convertible Preferred Stock
Class Of Stock [Line Items]
Preferred stock, par value	$ 0.0001	$ 0.0001		$ 0.0001
Number of shares issued	4,929,948
Preferred stock issuance price	$ 8.93
Gross proceeds from issuance of preferred stock	$ 44,000,000
Offering costs	$ 321,000
Common Stock
Class Of Stock [Line Items]
Convertible preferred stock converted into common stock		7,172,496