Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 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:

	June 30, 2018
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial Assets
Money market funds	$	124,433	$	—	$	—	$	124,433
Restricted money market funds		300		—		—		300
Total financial assets	$	124,733	$	—	$	—	$	124,733

	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