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Business Combination - Schedule of changes in the Company's IPR&D and CVR since the Merger (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 15, 2020
In Process Research and Development
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value	$ 0	$ 1,190	$ 3,490
In Process Research and Development | Change in Fair Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value	(1,190)	(2,300)
Contingent Value Rights Agreement
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value	0	980	$ 2,880
Contingent Value Rights Agreement | Change in Fair Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value	$ (980)	$ (1,900)

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- Definition

The amount, measured at acquisition-date fair value, of all the assets acquired that arise from contingencies and were recognized by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472

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- Definition

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+ References

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