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Cash, Cash Equivalents and Short-Term Investments - Additional Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Cash, Cash Equivalents and Short-Term Investments
Realized (gains) and Losses on available-for-sale investments	$ (10)	$ 80
Equity Securities, FV-NI	$ 110,100	$ 110,100

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- References

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- Definition

Amount of realized gain (loss) on investment in debt and equity securities. Excludes other-than-temporary impairment (OTTI).

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- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

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