Investments and Fair Value Measurements - Amortized Cost and Unrealized Gains (Losses) (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Amortized Cost
Less than 1 year	$ 16,278,000	$ 301,000
Unrealized Gains
Less than 1 year	1,000	1,100
Unrealized Losses
Less than 1 year	0	(100)
Aggregate Estimated Fair Value
Less than 1 year	16,279,000	302,000
U.S. treasuries classified as restricted cash and investments
Amortized Cost
Less than 1 year	8,746,600	11,000,000
Unrealized Gains
Less than 1 year	700	0
Unrealized Losses
Less than 1 year	(300)	0
Aggregate Estimated Fair Value
Less than 1 year	8,747,000	11,000,000
U.S. treasuries
Amortized Cost
Less than 1 year	16,278,000	301,000
Unrealized Gains
Less than 1 year	1,000	1,100
Unrealized Losses
Less than 1 year	0	(100)
Aggregate Estimated Fair Value
Less than 1 year	16,279,000	302,000
U.S. treasuries \| U.S. treasuries classified as restricted cash and investments
Amortized Cost
Less than 1 year	8,746,600	11,000,000
Unrealized Gains
Less than 1 year	700	0
Unrealized Losses
Less than 1 year	(300)	0
Aggregate Estimated Fair Value
Less than 1 year	$ 8,747,000	$ 11,000,000

Debt Securities, Available-for-Sale, Unrealized Gain, Maturity, Allocated and Single Maturity Date, Year One

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- Definition

Debt Securities, Available for Sale, Unrealized Gains

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Debt Securities, Available-for-Sale, Unrealized Loss, Maturity, Allocated and Single Maturity Date, Year One

+ References

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

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- Definition

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 320
-Name Accounting Standards Codification
-Section 50
-Paragraph 3A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477268/942-320-50-3A

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