Crypto assets (Details)	1 Months Ended	12 Months Ended
Jul. 31, 2025	Jun. 30, 2026 USD ($)
Quantity
Cryptocurrencies, current		70,543,745
Amount
Cryptocurrencies, current		$ 5,078,444
Crypto Asset, Name [Extensible Enumeration]	btog:DogecoinMember	btog:DogecoinMember
Aggregate cost basis		$ 16,000,000

Indicates name of crypto asset. Excludes crypto asset held for platform user.

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

Reference 2: 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

Reference 3: 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

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 60
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-Section 50
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-3

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-3

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-6

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-URI https://asc.fasb.org/1943274/2147476162/350-60-50-3

Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-URI https://asc.fasb.org/1943274/2147476162/350-60-50-1

Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476163/350-60-45-1

+ Details