Cash and Cash Equivalents and Investments

12 Months Ended

Dec. 31, 2020

Cash, Cash Equivalents and Investments

The fair value of cash and cash equivalents and investments held at December 31, 2020 and 2019 are as follows:


	As of December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
			(in thousands)
Cash and cash equivalents	$	126,263	$	—	$	—	$	126,263
Securities maturing within one year:

Corporate debt securities	26,018		5		(11)		26,012
Total short-term investments	$	26,018	$	5	$	(11)	$	26,012
Total cash and cash equivalents and investments	$	152,281	$	5	$	(11)	$	152,275


	As of December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
			(in thousands)
Cash and cash equivalents	$	36,112	$	—	$	—	$	36,112
Securities maturing within one year:
U.S. treasury securities	235,463		94		(10)		235,547

Total short-term investments	$	235,463	$	94	$	(10)	$	235,547
Total cash and cash equivalents and investments	$	271,575	$	94	$	(10)	$	271,659

There were no realized gains or losses for the years ended December 31, 2020, 2019, and 2018.