Cash, Cash Equivalents and Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2020

Cash and Cash Equivalents [Abstract]

Summary of cash, cash equivalents and available-for-sale marketable securities

A summary of cash, cash equivalents and available-for-sale marketable securities held by the Company as of June 30, 2020 and December 31, 2019 is as follows (in thousands):

	June 30, 2020
	Cost		Unrealized gains		Unrealized losses			Fair value
Cash and cash equivalents:
Cash (Level 1)	$	2,668	$	—	$	—		$	2,668
Money market funds (Level 1)		42,952		—		—			42,952
Corporate debt securities due within 3 months of date of purchase (Level 2)		16,247		—		—			16,247
Total cash and cash equivalents		61,867		—		—			61,867
Marketable securities:
Corporate debt securities due within 1 year of date of purchase (Level 2)		268,946		993		(6	)		269,933
U.S. government and government sponsored entities due within 1 year of date of purchase (Level 2)		48,470		92		—			48,562
Corporate debt securities due within 1 to 2 years of date of purchase (Level 2)		4,016		4		(2	)		4,018
Total cash, cash equivalents and marketable securities	$	383,299	$	1,089	$	(8	)	$	384,380

	December 31, 2019
	Cost		Unrealized gains		Unrealized losses			Fair value
Cash and cash equivalents:
Cash (Level 1)	$	1,772	$	—	$	—		$	1,772
Money market funds (Level 1)		44,925		—		—			44,925
Corporate debt securities due within 3 months of date of purchase (Level 2)		—		—		—			—
Total cash and cash equivalents		46,697		—		—			46,697
Marketable securities:
Corporate debt securities due within 1 year of date of purchase (Level 2)		309,365		220		(40	)		309,545
Corporate debt securities due within 1 to 2 years of date of purchase (Level 2)		82,767		39		(3	)		82,803
Total cash, cash equivalents and marketable securities	$	438,829	$	259	$	(43	)	$	439,045