Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Summary of Marketable Securities

Marketable securities consisted of the following as of March 31, 2022 and December 31, 2021 (in thousands):

	March 31, 2022 (unaudited)
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale securities - short-term:
Corporate debt securities	$	4,046	$	—	$	—	$	4,046
U.S. treasury securities	5,076		—		(34)		5,042
Commercial paper	36,775		—		—		36,775
Yankee debt securities	3,897		—		(20)		3,877
Supranational	3,027		—		(8)		3,019
Asset-backed securities, short-term	9,565		—		(32)		9,533
Total available-for-sale securities - short-term	62,386		—		(94)		62,292
Asset-backed securities, long term	4,022		—		(8)		4,014
Total available-for-sale securities	$	66,408	$	—	$	(102)	$	66,306

	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale securities - short-term:
Corporate debt securities, short-term	$	15,786	$	—	$	(6)	$	15,780
U.S. treasury securities	5,073		—		(9)		5,064
Commercial paper	36,759		$	—	—		36,759
Yankee debt securities	3,941		—		(9)		3,932
Supranational	3,054		—		(3)		3,051
Asset-backed securities, short-term	12,128		—		(12)		12,116
Total available-for-sale securities - short-term	76,741		—		(39)		76,702
Corporate debt securities, long-term	3,082		—		(2)		3,080
Asset-backed securities, long-term	4,044		—		(4)		4,040
Total available-for-sale securities - long-term	7,126		—		(6)		7,120
Total available-for-sale securities	$	83,867	$	—	$	(45)	$	83,822