Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Company's Available-for-Sale Securities by Level within Fair Value Hierarchy

The Company’s available-for-sale securities by level within the fair value hierarchy were as follows (in thousands):

As of March 31, 2016	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market fund	$	26,522	$	—	$	—	$	26,522
Short-term investments:
Corporate debt securities	—		21,738		—		21,738
U.S. government-related debt securities	—		5,413		—		5,413
Total	$	26,522	$	27,151	$	—	$	53,673
As of December 31, 2015	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market fund	$	5,371	$	—	$	—	$	5,371
Short-term investments:
Corporate debt securities	—		26,088		—		26,088
U.S. government-related debt securities	—		1,100		—		1,100
Total	$	5,371	$	27,188	$	—	$	32,559