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Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Available-for-sale marketable securities

Available-for-sale marketable securities consisted of the following (in thousands):

						December 31, 2022
						Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Estimated Fair Value
Asset-backed securities						$	1,146					$	—					$	—					$	1,146
Corporate debt securities						7,139						—						(9)						7,130
U.S. Treasury securities						111,469						—						(934)						110,535
Agency bonds						2,783						2						(1)						2,784
Commercial paper						7,004						—						—						7,004
						$	129,541					$	2					$	(944)					$	128,599

						December 31, 2021
						Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Estimated Fair Value
Asset-backed securities						$	32,745					$	—					$	(53)					$	32,692
Corporate debt securities						58,885						—						(86)						58,799
U.S. Treasury securities						231,230						—						(469)						230,761
Non-U.S. Government Securities						17,232						—						(12)						17,220
Commercial paper						282,731						—						—						282,731
						$	622,823					$	—					$	(620)					$	622,203

Investments Classified by Contractual Maturity Date [Table Text Block]

The estimated fair value of our contractual maturities of available-for-sale debt securities are as follows (in thousands):

						December 31, 2022						December 31, 2021
Due within one year						$	114,353					$	500,965
After one but within five years						14,246						121,238
						$	128,599					$	622,203

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

The following table summarizes, by major security type, our cash equivalents and available-for-sale marketable securities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in thousands):

						December 31, 2022																		December 31, 2021
						Level 1						Level 2						Total estimated fair value						Level 1						Level 2						Total estimated fair value
Cash equivalents:
Money market funds						$	191,704					$	—					$	191,704					$	118,707					$	—					$	118,707
Available-for-sale marketable    securities:
Asset-backed securities						—						1,146						1,146						—						32,692						32,692
Corporate debt securities						—						7,130						7,130						—						58,799						58,799
U.S. Treasury securities						110,535						—						110,535						230,761						—						230,761
Non-US Government securities						—						—						—						—						17,220						17,220
Agency bonds						2,784						—						2,784
Commercial paper						—						7,004						7,004						—						282,731						282,731
						$	305,023					$	15,280					$	320,303					$	349,468					$	391,442					$	740,910

X

- Definition

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-URI http://asc.fasb.org/topic&trid=2196928

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Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

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