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Marketable Securities

6 Months Ended

Jun. 30, 2022

Investments [Abstract]

Marketable Securities

Marketable Securities

The amortized cost, unrealized gain (loss), and estimated fair value of the Company's investments in securities available for sale consisted of the following:

			June 30, 2022
			Amortized Cost						Unrealized Gain						Unrealized Loss						Estimated Fair Value
Marketable securities
U.S. government securities			$	420,162					$	—					$	(9,713)					$	410,449
Commercial paper			18,972						—						—						18,972
Corporate debt securities			15,631						—						(179)						15,452
Total marketable securities			$	454,765					$	—					$	(9,892)					$	444,873

			December 31, 2021
			Amortized Cost						Unrealized Gain						Unrealized Loss						Estimated Fair Value
Marketable securities
U.S. government securities			$	420,392					$	—					$	(2,107)					$	418,285
Commercial paper			13,878						—						—						13,878
Asset-backed securities			2,003						—						(1)						2,002
Corporate debt securities			18,731						3						(24)						18,710
Total marketable securities			$	455,004					$	3					$	(2,132)					$	452,875

The Company had eighteen and eight separate marketable securities in unrealized loss positions as of June 30, 2022 and December 31, 2021, respectively. The Company did not identify any marketable securities that were other-than-temporarily impaired as of June 30, 2022 and December 31, 2021. The Company does not intend to sell any marketable securities that have unrealized losses on June 30, 2022 and it is not more likely than not that the Company will be required to sell such securities before any anticipated recovery.

The following table summarizes the stated maturities of the Company’s marketable securities:

			June 30, 2022												December 31, 2021
			Amortized Cost						Estimated Fair Value						Amortized Cost						Estimated Fair Value
Due within one year			$	342,294					$	335,772					$	64,914					$	64,879
Due after one year through two years			112,471						109,101						390,090						387,996
Total			$	454,765					$	444,873					$	455,004					$	452,875

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- References

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- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-URI https://asc.fasb.org/subtopic&trid=2209399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-URI https://asc.fasb.org/subtopic&trid=2324412

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-URI https://asc.fasb.org/topic&trid=2196928

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-URI https://asc.fasb.org/subtopic&trid=2176304

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1403
-Paragraph (b)

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