Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Summary of Fair Value Hierarchy for Financial Assets

The Company’s fair value hierarchy for its cash equivalents and marketable securities as of September 30, 2016 and December 31, 2015, respectively, was as follows:

September 30, 2016	Level 1		Level 2		Level 3		Total
Money market securities	$	6,167	$	—	$	—	$	6,167
Commercial paper		—		25,671		—		25,671
Federal agency notes		—		15,095		—		15,095
Corporate notes		—		10,933		—		10,933
U.S. treasuries		—		4,521		—		4,521
Pre-refunded municipal bonds (1)		—		2,738		—		2,738
Total	$	6,167	$	58,958	$	—	$	65,125

December 31, 2015	Level 1		Level 2		Level 3		Total
Money market securities	$	2,001	$	—	$	—	$	2,001
Federal agency notes		—		11,722		—		11,722
U.S. treasuries		—		7,059		—		7,059
Corporate notes		—		6,884		—		6,884
Pre-refunded municipal bonds (1)		—		4,747		—		4,747
Commercial paper		—		3,794		—		3,794
Certificates of deposits		—		2,220		—		2,220
Total	$	2,001	$	36,426	$	—	$	38,427

(1) Pre-refunded municipal bonds are collateralized by U.S. treasuries.

Summary of Fair Value Maturities for Financial Asset

The fair value maturities of the Company’s cash equivalents and marketable securities as of September 30, 2016 are as follows:

	Maturities by Period
	Total		Lessthan 1 year		1-5 years		5 - 10 years		More than 10 years
Cash equivalents and marketable securities	$	65,125	$	53,283	$	11,842	$	—	$	—