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Fair Value Measurements - Financial assets measured at fair value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value Measurements
Amortized cost	$ 427,332	$ 461,453
Unrealized loss	(172)	(90)
Unrealized gain	82	611
Fair value	427,242	461,974
Money market funds
Fair Value Measurements
Amortized cost	88,625	124,443
Fair value	88,625	124,443
Cash equivalents
Fair Value Measurements
Amortized cost	88,625	124,443
Fair value	88,625	124,443
U.S. government bonds
Fair Value Measurements
Amortized cost	71,055	84,783
Unrealized loss	(43)	(35)
Unrealized gain	17	187
Fair value	71,029	84,935
U.S. government agency bonds
Fair Value Measurements
Amortized cost	78,597	82,185
Unrealized loss	(30)	(16)
Unrealized gain	20	171
Fair value	78,587	82,340
Corporate debt securities
Fair Value Measurements
Amortized cost	189,055	170,042
Unrealized loss	(99)	(39)
Unrealized gain	45	253
Fair value	189,001	170,256
Short-term investments
Fair Value Measurements
Amortized cost	338,707	337,010
Unrealized loss	(172)	(90)
Unrealized gain	82	611
Fair value	$ 338,617	$ 337,531

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).

+ References

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Amount, before tax, of unrealized loss 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).

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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