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Investments

12 Months Ended

Dec. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Investments

3.Investments.

Available-for-sale investments by security type were as follows (in thousands):

		Estimated Fair Value				Gross Unrealized Gains				Gross Unrealized Losses				Amortized Cost
At December 31, 2024:
U.S. Treasuries - Cash equivalents		$	329,457			$	84			$	—			$	329,373
Total		$	329,457			$	84			$	—			$	329,373
At December 31, 2023:
U.S. Treasuries - Cash equivalents		$	94,523			$	18			$	—			$	94,505
Total		$	94,523			$	18			$	—			$	94,505

There were no realized gains or losses from available-for-sale securities for the years ended December 31, 2024 or 2023. There were realized losses from sale of available-for-sale securities of $762 thousand for the year ended December 31, 2022.

The estimated fair values of available-for-sale securities at December 31, 2024, by contractual maturity, are summarized as follows (in thousands):

		2024
Due in one year or less		$	329,457

		For the Years Ended December 31,
		2024				2023				2022
Equity securities:
Net gains (losses) recognized during the period on    equity securities		$	5,075			$	3,024			$	—
Unrealized net gains (losses) recognized during the    period on equity securities still held at the reporting    date		$	5,075			$	3,024			$	—

There were no sales of equity securities during the years ended December 31, 2024, 2023 and 2022.

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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://www.xbrl.org/2009/role/commonPracticeRef
-Topic 940
-SubTopic 320
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/940-320/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1403
-Paragraph b
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/320/tableOfContent

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-10

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6B

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6B
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6B

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 320
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/942-320/tableOfContent

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