Cash Equivalents and Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2020

Cash Equivalents and Marketable Securities

Schedule of cash equivalents and marketable securities

Cash equivalents and marketable securities consisted of the following (in thousands):

	December 31, 2020
	Amortized		Gross Unrealized
	Cost		Gains		Losses		Fair Value
Money market funds	$	27,481	$	—	$	—	$	27,481
Commercial paper		65,866		—		(3)		65,863
Corporate debt securities		27,592		2		(4)		27,590
U.S. Treasury and agency securities		183,203		10		(3)		183,210
Total cash equivalents and marketable securities	$	304,142	$	12	$	(10)	$	304,144
Classified as:
Cash equivalents							$	113,693
Marketable securities - current								188,451
Marketable securities - noncurrent								2,000
Total cash equivalents and marketable securities							$	304,144

	December 31, 2019
	Amortized		Gross Unrealized
	Cost		Gains		Losses		Fair Value
Money market funds	$	12,964	$	—	$	—	$	12,964
Commercial paper		44,284		2		(4)		44,282
Corporate debt securities		33,653		11		(2)		33,662
U.S. Treasury and agency securities		40,798		14		(2)		40,810
Total cash equivalents and marketable securities	$	131,699	$	27	$	(8)	$	131,718
Classified as:
Cash equivalents							$	31,707
Marketable securities - current								100,011
Total cash equivalents and marketable securities							$	131,718