Organization, Business, Basis of Presentation and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Schedule of Potentially Dilutive Securities Not Included in Calculation of Diluted Net Loss Per Share

Potentially dilutive securities not included in the calculation of diluted net loss per share because to do so would be anti-dilutive are as follows (in common share equivalents):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Redeemable convertible preferred stock outstanding		—		9,238,868		—		9,238,868
Redeemable convertible preferred stock issuable upon    conversion of convertible promissory note		—		94,455		—		94,455
Warrants for redeemable convertible preferred stock		—		25,970		—		25,970
Warrants for common stock		25,970		—		25,970		—
Common stock options		1,483,279		1,342,570		1,483,279		1,342,570
		1,509,249		10,701,863		1,509,249		10,701,863