Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Summary of Financial Assets Measured at Fair Value on a Recurring Basis

Financial assets measured at fair value on a recurring basis are categorized in the tables below based upon the lowest level of significant input to the valuations (in thousands):

	June 30, 2017
	Level 1		Level 2		Level 3		Total
Money market funds		4,700		—		—		4,700
Total	$	4,700	$	—	$	—	$	4,700

	December 31, 2016
	Level 1		Level 2		Level 3		Total
Money market funds	$	2,864	$	—	$	—	$	2,864
U.S. government treasury bills		—		3,008		—		3,008
Corporate bonds and commercial paper		—		5,504		—		5,504
Total	$	2,864	$	8,512	$	—	$	11,376