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Short-term Investments (Tables)

3 Months Ended

Mar. 31, 2024

The amortized cost, unrealized gain (loss), and estimated fair value of the Company's short-term investments consisted of the following:


	March 31, 2024
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Short-term Investments
U.S. treasury securities	$	215,265	$	17	$	(368)	$	214,914


Asset-backed securities	10,440		—		(15)		10,425
Corporate debt securities	2,989		—		(4)		2,985

Total short-term investments	$	228,694	$	17	$	(387)	$	228,324


	December 31, 2023
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Short-term investments
U.S. treasury securities	$	239,297	$	970	$	(11)	$	240,256
U.S. agency securities	15,000		—		(7)		14,993

Asset-backed securities	10,438		62		—		10,500
Corporate debt securities	2,981		—		(6)		2,975
Total short-term investments	$	267,716	$	1,032	$	(24)	$	268,724

The following table summarizes the stated maturities of the Company’s short-term investments:


	March 31, 2024				December 31, 2023
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due within one year	$	72,508	$	72,482	$	90,438	$	90,533
Due after one year through four years	156,186		155,842		177,278		178,191
Total	$	228,694	$	228,324	$	267,716	$	268,724