Fair Value of Financial Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis

The following tables present information about the Company’s assets that are measured at fair value on a recurring basis as of March 31, 2019 and December 31, 2018 and indicate the level of the fair value hierarchy utilized to determine such fair value:

	Fair Value Measurements as of March 31, 2019 Using:
(In thousands)	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	—	$	66,083	$	—	$	66,083
Marketable securities		—		129,913		—		129,913
	$	—	$	195,996	$	—	$	195,996

	Fair Value Measurements as of December 31, 2018 Using:
(In thousands)	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	—	$	57,739	$	—	$	57,739
Marketable securities		—		171,555		—		171,555
	$	—	$	229,294	$	—	$	229,294