Cash, cash equivalents, and available-for-sale marketable securities (Tables)

9 Months Ended

Sep. 30, 2019

Cash, cash equivalents, and available for sale marketable securities

Schedule of money market funds and marketable securities

Money market funds and marketable securities included the following at September 30, 2019 and December 31, 2018:

	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(in thousands)
As of September 30, 2019
Money market funds included in cash and cash equivalents	$	81,711	$	—	$	—	$	81,711
Marketable securities:
U.S. Treasury notes		224,647		113		—		224,760
Equity securities		1,220		804		—		2,024
Total marketable securities	$	225,867	$	917	$	—	$	226,784
Total money market funds and marketable securities	$	307,578	$	917	$	—	$	308,495
As of December 31, 2018
Money market funds included in cash and cash equivalents	$	46,173	$	—	$	—	$	46,173
Marketable securities:
U.S. Treasury notes		108,951		1		5		108,947
Equity securities		1,220		—		592		628
Total marketable securities	$	110,171	$	1	$	597	$	109,575
Total money market funds and marketable securities	$	156,344	$	1	$	597	$	155,748

Reconciliation of cash, cash equivalents, and restricted cash

	As of September 30,		As of December 31,
	2019		2018
	(in thousands)
Cash and cash equivalents	$	82,640	$	46,859
Restricted cash included in deposits and other non-current assets		735		735
Total cash, cash equivalents, and restricted cash	$	83,375	$	47,594