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Stock-Based Compensation - Stock based compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Stock based compensation expense
Total stock-based compensation expense	$ 2,312	$ 2,483	$ 7,182	$ 7,778
Research and development
Stock based compensation expense
Total stock-based compensation expense	779	1,054	2,274	3,068
General and administrative
Stock based compensation expense
Total stock-based compensation expense	$ 1,533	$ 1,429	$ 4,908	$ 4,710

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

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+ References

No definition available.

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