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Segment and Geographic Information (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of Revenue by Geographic Area

Geographic revenues, which are based on the region that revenue is generated, are as follows (in thousands):

		Years Ended December 31,
		2023				2022				2021
China		$	109,375			$	84,631			$	55,640
Europe			9,549				33,820				131,243
Japan			15,867				9,764				2,305
United States			12,961				12,519				46,121
Total revenue		$	147,752			$	140,734			$	235,309

Schedule of Long Lived Assets by Geographic Area

Property and equipment, net by geographic location are as follows (in thousands):

		December 31,
		2023				2022
United States		$	4,785			$	10,094
China			8,341				10,511
Total property and equipment		$	13,126			$	20,605

Summary of Finance and Operating Lease Right of Use Assets by Geographical Location

Finance lease right-of-use assets and operating lease right-of-use assets, net by geographic location are as follows (in thousands):

		December 31,
		2023				2022
United States		$	132			$	424
China			21				11
Total finance lease right-of-use assets		$	153			$	435
United States		$	64,939			$	76,273
China			3,154				3,620
Total operating lease right-of-use assets		$	68,093			$	79,893

Schedule of Customer Concentration by Collaboration Partners and Distribution Entity

The Company’s revenues to date have been generated from the following collaboration partners and distribution entity that individually accounted for 10% or more of the Company’s total revenue or accounts receivable:

		Percentage of Revenue												Percentage of Accounts Receivable
		Years Ended December 31,												December 31,
		2023				2022				2021				2023				2022
Falikang — Related party			60	%			51	%			15	%			42	%			65	%
Astellas — Related party			17	%			31	%			57	%			7	%			9	%
AstraZeneca			8	%			9	%			20	%			33	%			16	%

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Summary of Finance and Operating Lease Right of Use Assets by Geographical Location.

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Tabular disclosure of long-lived assets, excluding financial instruments, long-term customer relationships of a financial institution, mortgage rights, deferred policy acquisition costs, and deferred tax assets, by geographic areas located in the entity's country of domicile and foreign countries in which the entity holds assets.

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-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph b
-SubTopic 10
-Topic 280
-Publisher FASB
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Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue.

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Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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