The following tables present the costs, net unrealized losses, and fair value by major security type for our investments as of June 30, 2024 and December 31, 2023 (in thousands):


	As of June 30, 2024
	Cost		Net Unrealized Losses		Fair Value		Cash and Cash equivalents		Short-term Investments		Long-term Investments
Cash	$	128,103	$	—	$	128,103	$	128,103	$	—	$	—
Level 1:
Money market funds	141,336		—		141,336		141,336		—		—
Commercial paper	12,032		(3)		12,029		—		12,029		—
Subtotal	153,368		(3)		153,365		141,336		12,029		—
Level 2:
Certificates of deposit	23,615		7		23,622		—		23,622		—
U.S. Government and agency securities	50,890		(171)		50,719		—		34,205		16,514
Corporate bonds	31,212		6		31,218		—		21,410		9,808
Subtotal	105,717		(158)		105,559		—		79,237		26,322
Level 3:	—		—		—		—		—		—
Total	$	387,188	$	(161)	$	387,027	$	269,439	$	91,266	$	26,322


	As of December 31, 2023
	Cost		Net Unrealized Losses		Fair Value		Cash and Cash equivalents		Short-term Investments		Long-term Investments
Cash	$	130,566	$	—	$	130,566	$	130,566	$	—	$	—
Level 1:
Money market funds	147,652		—		147,652		147,652		—		—
Commercial paper	16,408		11		16,419		—		16,419		—
Subtotal	164,060		11		164,071		147,652		16,419		—
Level 2:
Certificates of deposit	15,366		21		15,387		—		15,387		—
U.S. Government and agency securities	49,393		(73)		49,320		—		33,198		16,122
Corporate bonds	28,927		26		28,953		—		19,327		9,626
Subtotal	93,686		(26)		93,660		—		67,912		25,748
Level 3:	—		—		—		—		—		—
Total	$	388,312	$	(15)	$	388,297	$	278,218	$	84,331	$	25,748