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Stock-based Compensation - Summary of Stock-Based Compensation Included in Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Stock-based compensation
Total stock-based compensation expense	$ 6,879	$ 4,951
Research and development expenses
Stock-based compensation
Total stock-based compensation expense	1,217	770
Selling, general and administrative expenses
Stock-based compensation
Total stock-based compensation expense	$ 5,662	$ 4,181

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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+ References

No definition available.

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