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Significant Accounting Policies - Estimated Fair Value of Assets and Liability (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Asset:
Asset, fair value	$ 238,419	$ 235,380
Money Market Fund
Asset:
Asset, fair value	122,759	99,226
Agency Securities
Asset:
Asset, fair value		8,912
Repo Securities
Asset:
Asset, fair value	3,250	3,250
U.S. Treasury Securities
Asset:
Asset, fair value	112,410	123,992
Level 1
Asset:
Asset, fair value	235,169	223,218
Level 1 | Money Market Fund
Asset:
Asset, fair value	122,759	99,226
Level 1 | Agency Securities
Asset:
Asset, fair value		0
Level 1 | U.S. Treasury Securities
Asset:
Asset, fair value	112,410	123,992
Level 2
Asset:
Asset, fair value	3,250	12,162
Level 2 | Agency Securities
Asset:
Asset, fair value		8,912
Level 2 | Repo Securities
Asset:
Asset, fair value	$ 3,250	$ 3,250

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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