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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables set forth the fair value of financial assets as of December 31, 2020 and 2019 that were measured at fair value on a recurring basis (in thousands):

		December 31, 2020
		Level 1				Level 2				Level 3				Total
Financial assets
Money market funds		$	103,283			$	—			$	—			$	103,283
U.S. government debt securities			—				671,777				—				671,777
Corporate bonds			—				11,581				—				11,581
Total financial assets		$	103,283			$	683,358			$	—			$	786,641

		December 31, 2019
		Level 1				Level 2				Level 3				Total
Financial assets
Money market funds		$	88,683			$	—			$	—			$	88,683
Commercial paper			—				121,867				—				121,867
U.S. government debt securities			—				377,243				—				377,243
Corporate bonds			—				86,615				—				86,615
Total financial assets		$	88,683			$	585,725			$	—			$	674,408

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- References

No definition available.

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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