The amount of collateral digital assets.

No definition available.

Name:	cshr_CollateralDigitalAssets
Namespace Prefix:	cshr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of digital asset exchange traded products.

+ References

No definition available.

+ Details

Name:	cshr_DigitalAssetExchangeTradedProducts
Namespace Prefix:	cshr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Digital assets were subject to sales restrictions term.

+ References

No definition available.

+ Details

Name:	cshr_DigitalAssetsSalesRestrictionsTerm
Namespace Prefix:	cshr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	cshr_DigitalAssetsandDigitalAssetETPsDetailsLineItems
Namespace Prefix:	cshr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of prepaids and other current assets.

+ References

No definition available.

+ Details

Name:	cshr_FairValueOfPrepaidsAndOtherCurrentAssets
Namespace Prefix:	cshr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loan facility balance.

+ References

No definition available.

+ Details

Name:	cshr_LoanFacilityBalance
Namespace Prefix:	cshr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cumulative realized gain on crypto asset from disposition. 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 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-4

+ Details

Name:	us-gaap_CryptoAssetCumulativeRealizedGainFromDisposition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cumulative realized loss on crypto asset from disposition. Excludes crypto asset held for platform user.

+ References

+ Details

Name:	us-gaap_CryptoAssetCumulativeRealizedLossFromDisposition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value of crypto asset subject to contractual sale restriction. 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 1
-Subparagraph (c)
-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 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-6

+ Details

Name:	us-gaap_CryptoAssetFairValueRestricted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_ConsolidatedEntitiesAxis=cshr_CoinsharesInternationalLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CryptoAssetAxis=cshr_DigitalAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Digital Assets and Digital Asset ETPs (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
	Apr. 30, 2025	Jun. 30, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Digital Assets and Digital Asset ETPs (Details) [Line Items]
Collateral digital assets			$ 136,000
Coinshares International Limited [Member]
Digital Assets and Digital Asset ETPs (Details) [Line Items]
Fair value of prepaids and other current assets			8,200	$ 5,100
Cumulative realized gains from dispositions of digital assets			127,700	633,400
Cumulative realized losses from dispositions of digital assets			196,400	6,500
Digital assets sales restrictions term	4 years
Fair value of the digital assets restrictions			1,145,428	1,190,998	$ 267,063
Loan facility balance			136,000	145,800
Digital asset exchange traded products			1,145,428	1,190,998
Digital Assets [Member] \| Coinshares International Limited [Member]
Digital Assets and Digital Asset ETPs (Details) [Line Items]
Fair value of prepaids and other current assets		26,200	8,200
Fair value of the digital assets restrictions				$ 4,100
Digital asset exchange traded products		$ 640,100	$ 1,145,400