Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Fair Value Hierarchy for Financial Assets

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

December 31, 2016	Level 1		Level 2		Level 3		Total
Money market securities	$	1,218	$	—	$	—	$	1,218
Federal agency notes		—		16,810		—		16,810
Commercial paper		—		16,757		—		16,757
Corporate notes		—		15,753		—		15,753
Pre-refunded municipal bonds (1)		—		6,716		—		6,716
U.S. treasuries		—		2,515		—		2,515
Total	$	1,218	$	58,551	$	—	$	59,769

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 December 31, 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	$	59,769	$	55,377	$	4,392	$	—	$	—