Cash, Cash Equivalents and Investments (Tables)

6 Months Ended

Jun. 30, 2019

Cash and Cash Equivalents [Abstract]

Summary of Cash, Cash Equivalents and Held-to-Maturity Investments by Type

The following tables summarize our cash, cash equivalents, and held-to-maturity investments at June 30, 2019 and December 31, 2018 (in thousands):

	As of June 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short-Term Investments
Cash	$	129,347	$	—	$	—		$	129,347	$	129,347	$	—
Level 1:
Money market funds	88,375		—		—			88,375		88,375		—
Level 2:
Corporate bonds	118,627		44		(5		)	118,666		1,998		116,629
Total	$	336,349	$	44	$	(5	)	$	336,388	$	219,720	$	116,629

	As of December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash and Cash Equivalents		Short-Term Investments
Cash	$	144,095	$	—	$	—	$	144,095	$	144,095	$	—
Level 1:
Money market funds	205,367		—		—		205,367		205,367		—
Total	$	349,462	$	—	$	—	$	349,462	$	349,462	$	—