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Summary of Significant Accounting Policies - Stock-Based Compensation (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Contribution Plan Disclosure
Expected term	6 years 3 months	6 years 3 months	6 years 3 months
Maximum
Defined Contribution Plan Disclosure
Expiration period	10 years	10 years	10 years

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