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Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Summary of Significant Accounting Policies
Allowance for doubtful accounts on grants receivable	$ 0		$ 0
Grant income	7,684	$ 5,947	18,035	$ 18,236
Deferred grant income, current	910		910		$ 1,702
Deferred grant income, noncurrent	1,052		1,052		1,686
Unrecognized income tax	$ 0		$ 0		$ 0
Expected dividend yield			0.00%	0.00%
Number of operating segments | segment			1

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Amount of allowance for credit loss on grants receivable, classified as current.

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The amount of current portion of deferred grant income as at the end of the reporting period.

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Amount of income related to grants.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
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Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of unrecognized tax benefits.

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