CASH EQUIVALENTS AND MARKETABLE SECURITIES - (Tables)

9 Months Ended

Sep. 30, 2020

The table below summarizes the Company’s cash equivalents and marketable securities (in thousands):


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Estimated Fair Value
September 30, 2020
Assets
Cash equivalents:
Money market funds	$	172,508	$	—	$	—	$	172,508
Commercial paper securities	5,998		1		—		5,999
Total	178,506		1		—		178,507
Marketable securities:
Commercial paper securities	238,248		169		(19)		238,398
Corporate debt securities	122,364		156		(36)		122,484
Asset-backed securities	13,067		3		(4)		13,066
U.S. government-sponsored entity debt securities	61,171		76		—		61,247
Total	434,850		404		(59)		435,195
Total cash equivalents and marketable securities	$	613,356	$	405	$	(59)	$	613,702

December 31, 2019
Assets
Cash equivalents:
Money market funds	$	30,496	$	—	$	—	$	30,496
Commercial paper securities	2,998		1		—		2,999
Total	33,494		1		—		33,495
Marketable securities:
Commercial paper securities	155,230		145		(7)		155,368
Corporate debt securities	94,905		115		(3)		95,017
U.S. government-sponsored entity debt securities	53,411		91		(9)		53,493
Total	303,546		351		(19)		303,878
Total cash equivalents and marketable securities	$	337,040	$	352	$	(19)	$	337,373

The fair value of investments available-for-sale by contractual maturity were as follows (in thousands):


	September 30, 2020		December 31, 2019
Maturing in one year or less	$	389,434	$	282,046
Maturing after one year through five years	45,761		21,832
Total	$	435,195	$	303,878