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Segment and Geographic Information (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Schedule of Revenue by Geographic Area

To provide a more meaningful disclosure along with the developments in its business, the Company changed its methodology of summarizing geographic revenues to be by the region that the revenue is generated, from the previously reported by the bill-to region. Accordingly, the information for the year ended December 31, 2020 and 2019 were recalculated. Geographic revenues, which are based on the region that revenue is generated, are as follows (in thousands):

		Years Ended December 31,
		2021				2020				2019
Europe		$	131,243			$	17,954			$	145,641
Japan			2,305				19,824				(23,167	)
China			55,640				73,361				20,967
United States			46,121				65,180				113,134
All other			—				—				2
Total revenue		$	235,309			$	176,319			$	256,577

Schedule of Inventory by Geographic Area

Geographic information for inventory is as follows (in thousands):

		December 31,
		2021				2020
By geographic location:
United States		$	5,522			$	1,080
China			25,493				15,450
Total inventory		$	31,015			$	16,530
By inventory ownership:
United States		$	11,695			$	4,715
China			19,320				11,815
Total inventory		$	31,015			$	16,530

Schedule of Long Lived Assets by Geographic Area

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

		December 31,
		2021				2020
United States		$	15,002			$	20,673
China			13,275				12,974
Total property and equipment		$	28,277			$	33,647

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,
		2021				2020
United States		$	730			$	29,551
China			31				55
Total finance lease right-of-use assets		$	761			$	29,606
United States		$	87,113			$	47
China			3,999				1,996
Total operating lease right-of-use assets		$	91,112			$	2,043

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 respectively accounted for 10% or more of the Company’s total revenue and accounts receivable:

		Percentage of Revenue												Percentage of Accounts Receivable
		Years Ended December 31,												December 31,
		2021				2020				2019				2021				2020
Astellas—Related party			57	%			21	%			48	%			63	%			10	%
AstraZeneca			20	%			37	%			52	%			34	%			26	%
Falikang—Related party			15	%			—	%			—	%			—	%			—	%

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Inventory by geographic areas.

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph b
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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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-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 41
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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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