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Related Party Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Sep. 12, 2024	Mar. 15, 2023	Mar. 13, 2023	Dec. 31, 2024	Dec. 31, 2023	Sep. 11, 2023	Dec. 31, 2020
Related Party Transaction [Line Items]
Common stock, Shares issued				31,115,341	14,817,696	11,021,248
Reverse stock split				Immediately prior to the effective time of the Reverse Merger, the Company effected a 1-for-16 reverse stock split of its common stock (the “Reverse Stock Split”). Unless noted otherwise, all references herein to share and per share amounts reflect the Reverse Stock Split.
Revenues				$ 6,235	$ 2,826
Unbilled receivable from related party				0	184
Deferred revenue current				479	0
Deferred revenue noncurrent				1,908	0
Aggregate principal amount				0	377
Principal and interest repaid				0	377
Fairmount Funds [Member] \| Dianthus [Member]
Related Party Transaction [Line Items]
Aggregate principal amount			$ 400
Interest rate			4.50%
Principal and interest repaid		$ 400
Zenas BioPharma Inc [Member]
Related Party Transaction [Line Items]
Common stock, Shares issued							156,848
Related party receivable				800	300
Unbilled receivable from related party					200
Deferred revenue current					100
Deferred revenue noncurrent					700
Zenas BioPharma Inc [Member] \| IPO [Member]
Related Party Transaction [Line Items]
Price per share	$ 17
Reverse stock split	1-for-8.6831
Fair value of the investment				$ 100
Zenas BioPharma Inc [Member] \| Tellus Bioventures Llc [Member]
Related Party Transaction [Line Items]
Percentage of outstanding shares				5.00%
Zenas BioPharma Inc [Member] \| Fairmount Funds [Member]
Related Party Transaction [Line Items]
Percentage of outstanding shares				9.00%
License Revenue [Member] \| Zenas BioPharma Inc [Member]
Related Party Transaction [Line Items]
Revenues				$ 5,900	$ 2,800