Cash, Cash Equivalents and Marketable Securities

12 Months Ended

Dec. 31, 2021

4. Cash, Cash Equivalents and Marketable Securities

A summary of cash, cash equivalents and

available-for-sale

marketable securities held by the Company as of December 31, 2021 and 2020 is as follows (in thousands):


	December 31, 2021
	Cost		Unrealized gains		Unrealized losses			Fair value
Cash and cash equivalents:
Cash (Level 1)	$	18,877	$	—	$	—		$	18,877
Money market funds (Level 1)		17,392		—		—			17,392

Total cash and cash equivalents		36,269		—		—			36,269
Marketable securities:
Corporate debt securities due within 1 year of date of purchase (Level 2)		228,348		6		(66	)		228,288
Corporate debt securities due within 1 to 2 years of date of purchase (Level 2)		5,809		—		(20	)		5,789

Total cash, cash equivalents and marketable securities	$	270,426	$	6	$	(86	)	$	270,346


	December 31, 2020
	Cost		Unrealized gains		Unrealized losses			Fair value
Cash and cash equivalents:
Cash (Level 1)	$	716	$	—	$	—		$	716
Money market funds (Level 1)		53,288		—		—			53,288

Total cash and cash equivalents		54,004		—		—			54,004
Marketable securities:
Corporate debt securities due within 1 year of date of purchase (Level 2)		227,172		80		(36	)		227,216
Corporate debt securities due within 1 to 2 years of date of purchase (Level 2)		2,926		4		(1	)		2,929

Total cash, cash equivalents and marketable securities	$	284,102	$	84	$	(37)		$	284,149