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Short-term Investments - Unrealized Gain (Loss) on Short-Term Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 228,694	$ 267,716
Unrealized Gain	17	1,032
Unrealized Loss	(387)	(24)
Short-term investments	228,324	268,724
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	215,265	239,297
Unrealized Gain	17	970
Unrealized Loss	(368)	(11)
Short-term investments	214,914	240,256
U.S. agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		15,000
Unrealized Gain		0
Unrealized Loss		(7)
Short-term investments		14,993
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,440	10,438
Unrealized Gain	0	62
Unrealized Loss	(15)	0
Short-term investments	10,425	10,500
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,989	2,981
Unrealized Gain	0	0
Unrealized Loss	(4)	(6)
Short-term investments	$ 2,985	$ 2,975

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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