Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

Summary of Significant Accounting Policies

Summary of potential outstanding common stock

	March 31, 2015	March 31, 2014
Employee stock purchase plan estimated share options outstanding	68,595	97,333
Common stock options and restricted stock units (“RSUs”) outstanding	4,312,262	4,356,616
Common stock available for grant	3,048,890	2,357,321
Common stock	27,232,013	26,271,593
Total	34,661,760	33,082,863

Schedule of calculation of basic and diluted net loss per share

	Three Months Ended March 31,
	2015			2014
	(in thousands, except per share amounts)
Numerator:
Net loss	$	(69	)	$	(4,122	)
Denominator:
Weighted average shares used in computing basic and diluted net loss per share	26,934,707			26,110,825
Basic and diluted net loss per share	$	(0.00	)	$	(0.16	)