Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Summary of Financial Assets Recognized at Fair Value on Recurring Basis

As of June 30, 2019 and December 31, 2018, the Company’s financial assets recognized at fair value on a recurring basis consisted of the following:

	Fair Value as of June 30, 2019
	Total		Level 1		Level 2		Level 3
	(In thousands)
Cash equivalents	$	45,799	$	45,799	$	-	$	-
Marketable securities:
U.S. Treasury securities		146,713		146,713		-		-
Financial institution debt securities		53,110		-		53,110		-
Corporate debt securities		18,892		-		18,892		-
Other asset-backed securities		7,983		-		7,983		-
Total marketable securities		226,698		146,713		79,985		-
Total	$	272,497	$	192,512	$	79,985	$	-

	Fair Value as of December 31, 2018
	Total		Level 1		Level 2		Level 3
	(In thousands)
Cash equivalents	$	45,986	$	45,986	$	-	$	-
Marketable securities:
U.S. Treasury securities		165,948		165,948		-		-
Financial institution debt securities		65,420		-		65,420		-
Corporate debt securities		23,835		-		23,835		-
Total marketable securities		255,203		165,948		89,255		-
Total	$	301,189	$	211,934	$	89,255	$	-