Significant Accounting Policies - Changes in Quantity of ETH and Fair Value (Details)	3 Months Ended	12 Months Ended
Mar. 31, 2026 USD ($) Ethereum	Dec. 31, 2025 USD ($) Ethereum
Ethereum [Member]
Significant Accounting Policies - Changes in Quantity of ETH and Fair Value (Details) [Line Items]
Beginning balance (in Ethereum) \| Ethereum	53,048.87	43,935.83
ETH purchased (in Ethereum) \| Ethereum	14,627.6	47,219.32
ETH sold (in Ethereum) \| Ethereum	(16,850.72)	(38,106.28)
Net change in unrealized appreciation (depreciation) from investment in ETH	$ 0	$ 0
Net change in unrealized appreciation (depreciation) from investment in ETH, Fair Value	0	0
Net realized gain on investment in ETH	0	0
Net realized gain on investment in ETH, Fair Value	$ 0	$ 0
Ending balance (in Ethereum) \| Ethereum	50,825.75	53,048.87
Fair Value [Member]
Significant Accounting Policies - Changes in Quantity of ETH and Fair Value (Details) [Line Items]
Beginning balance, Fair Value	$ 157,608,454	$ 146,428,902
ETH purchased, Fair Value	34,473,207	172,013,256
ETH sold, Fair Value	(40,570,073)	(127,280,000)
Net change in unrealized appreciation (depreciation) from investment in ETH	(30,226,986)	(34,062,356)
Net change in unrealized appreciation (depreciation) from investment in ETH, Fair Value	(30,226,986)	(34,062,356)
Net realized gain on investment in ETH	(14,489,797)	508,652
Net realized gain on investment in ETH, Fair Value	(14,489,797)	508,652
Ending balance, Fair Value	$ 106,794,805	$ 157,608,454

Number of restricted and unrestricted crypto asset units held. Excludes crypto asset units held for platform user.

No definition available.

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- Definition

Number of restricted and unrestricted crypto asset units purchased. Excludes crypto asset units held for platform user.

+ References

No definition available.

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- Definition

Number of restricted and unrestricted crypto asset units sold. Excludes crypto asset units held for platform user.

+ References

No definition available.

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- References

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- Definition

Fair value of crypto asset. Excludes crypto asset held for platform user.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476163/350-60-45-1

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- Definition

Amount of increase in crypto asset from purchase. Excludes crypto asset held for platform user.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-3

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Period Type:	duration

- Definition

Amount of realized gain (loss) from remeasurement of crypto asset, classified as operating and nonoperating. Excludes crypto asset held for platform user.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476163/350-60-45-2

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- Definition

Amount of decrease in crypto asset from sale. Excludes crypto asset held for platform user.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-3

+ Details

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- Definition

Amount of unrealized gain (loss) from remeasurement of crypto asset, classified as operating and nonoperating. Excludes crypto asset held for platform user.

+ References

+ Details

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