Available-for-Sale Securities (Tables)

6 Months Ended

Jun. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-Sale Securities

The following table is a summary of available-for-sale securities recorded in cash and cash equivalents, restricted cash, or marketable securities in our condensed consolidated balance sheets (in thousands):

	June 30,2021								December 31, 2020
	Amortized		Unrealized		Unrealized		Estimated Fair		Amortized		Unrealized		Unrealized		Estimated Fair
	Cost		Gains		(Losses)		Value		Cost		Gains		(Losses)		Value
Financial Assets:
Money market funds	$	358,206	$	—	$	—	$	358,206	$	486,174	$	—	$	—	$	486,174
Corporate debt securities		11,239		33		—		11,272		29,641		163		—		29,804
U.S. government agency securities		1,800		—		—		1,800		15,906		37		—		15,943
Certificates of deposits		—		—		—		—		241		2		—		243
U.S. government securities		5,003		10		—		5,013		20,036		100		—		20,136
Total	$	376,248	$	43	$	—	$	376,291	$	551,998	$	302	$	—	$	552,300

Summary of Classification of Available-for-Sale Securities on Consolidated Balance Sheets

The following table summarizes the classification of the available-for-sale securities on our condensed consolidated balance sheets (in thousands):

	June 30, 2021		December 31, 2020
Cash and cash equivalents	$	358,206	$	486,174
Short-term marketable securities		18,085		66,126
Total	$	376,291	$	552,300