Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Financial Assets Measured on Recurring Basis

The following table sets forth the fair value of the Company’s financial assets measured on a recurring basis by level within the fair value hierarchy:

	March 31, 2018
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial Assets
Money market funds	$	133,448	$	—	$	—	$	133,448
Restricted money market funds		175		—		—		175
Total financial assets	$	133,623	$	—	$	—	$	133,623

	December 31, 2017
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial Assets
Money market funds	$	99,792	$	—	$	—	$	99,792
Restricted money market funds		187		—		—		187
Total financial assets	$	99,979	$	—	$	—	$	99,979