Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Potentially Dilutive Shares Excluded From Calculation of Diluted Net Loss Per Share

The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Stock options		1,534,817		1,679,969		1,560,546		1,584,046
Restricted stock units		59,130		51,679		78,430		64,043