Cash Equivalents and Investments (Tables)

3 Months Ended

Mar. 31, 2020

Table Text Blocks

Schedule of cash equivalents and investments, available-for-sale

Cash equivalents and investments, available-for-sale, consisted of the following at March 31, 2020 and December 31, 2019 (in thousands):

	Amortized		Unrealized		Unrealized		Fair
March 31, 2020	Cost		Gain		Losses		Value
Cash equivalents:
Money market funds	$	341,711	$	—	$	—	$	341,711
U.S. treasury obligations		29,999		—		—		29,999
Investments, available-for-sale:
U.S. government agency securities		100,113		883		—		100,996
U.S. treasury obligations		272,174		2,092		—		274,266
Total	$	743,997	$	2,975	$	—	$	746,972

	Amortized		Unrealized		Unrealized		Fair
December 31, 2019	Cost		Gain		Losses		Value
Cash equivalents:
Money market funds	$	98,946	$	—	$	—	$	98,946
U.S. treasury obligations		14,992		—		—		14,992
Investments, available-for-sale:
U.S. government agency securities		128,156		160		(4)		128,312
U.S. treasury obligations		305,360		358		(8)		305,710
Total	$	547,454	$	518	$	(12)	$	547,960