XML 82 R66.htm IDEA: XBRL DOCUMENT
v3.25.3

Crypto Assets Held - Schedule of Fair Value Roll-forward of Crypto Assets Held at Fair Value (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 USD ($) crypto_unit | Sep. 30, 2025 USD ($) crypto_unit | Dec. 31, 2024 USD ($) crypto_unit
Crypto Asset [Roll Forward] |  |  |
Crypto assets held beginning balance |  | $ 470,101 | $ 327,866
Addition of crypto assets |  | 848,866 | 743,034
Disposition of crypto assets |  | (730,692) | (945,632)
Realized gain on crypto assets |  | 81,249 | 177,528
Realized loss on crypto assets |  | (20,094) | (1,764)
Unrealized gain (loss) on crypto assets |  | 25,533 | 169,069
Crypto assets held, ending balance | $ 674,963 | 674,963 | 470,101
Crypto assets acquired | 15,100 | 238,500 | 384,300
Disposition | 800 | 192,400 | 275,100
Realized gain on receivable, crypto assets pledged |  | 44,500 | 135,800
Unrealized loss on receivable, crypto assets pledged |  | 13,500 | (17,800)
Bitcoin |  |  |
Crypto Asset [Roll Forward] |  |  |
Crypto assets held beginning balance |  | 412,115 | 295,320
Addition of crypto assets |  | 519,334 | 431,487
Disposition of crypto assets |  | (412,454) | (608,225)
Realized gain on crypto assets |  | 47,671 | 149,878
Realized loss on crypto assets |  | (7,562) | (610)
Unrealized gain (loss) on crypto assets |  | 45,642 | 144,265
Crypto assets held, ending balance | $ 604,746 | $ 604,746 | $ 412,115
Number of crypto assets acquired (in units) | crypto_unit | 132 | 616 | 2,715
Number of crypto assets disposed (in units) | crypto_unit | 5 | 505 | 1,879
Ether |  |  |
Crypto Asset [Roll Forward] |  |  |
Crypto assets held beginning balance |  | $ 17,562 | $ 25,718
Addition of crypto assets |  | 305,186 | 299,660
Disposition of crypto assets |  | (293,544) | (327,979)
Realized gain on crypto assets |  | 29,188 | 26,555
Realized loss on crypto assets |  | (11,482) | (545)
Unrealized gain (loss) on crypto assets |  | (746) | (5,847)
Crypto assets held, ending balance | $ 46,164 | $ 46,164 | $ 17,562
Number of crypto assets acquired (in units) | crypto_unit |  | 65,361 | 68,996
Number of crypto assets disposed (in units) | crypto_unit | 1 | 61,696 | 56,766
Other |  |  |
Crypto Asset [Roll Forward] |  |  |
Crypto assets held beginning balance |  | $ 40,424 | $ 6,828
Addition of crypto assets |  | 24,346 | 11,887
Disposition of crypto assets |  | (24,694) | (9,428)
Realized gain on crypto assets |  | 4,390 | 1,095
Realized loss on crypto assets |  | (1,050) | (609)
Unrealized gain (loss) on crypto assets |  | (19,363) | 30,651
Crypto assets held, ending balance | $ 24,053 | $ 24,053 | $ 40,424

X
- Definition Crypto Asset, Purchase, Number Of Units + References No definition available. + Details
Name: | gemi_CryptoAssetPurchaseNumberOfUnits
Namespace Prefix: | gemi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Crypto Asset, Disposition, Number Of Units + References No definition available. + Details
Name: | gemi_CryptoAssetSaleNumberOfUnits
Namespace Prefix: | gemi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Receivable, Crypto Asset Pledged, Realized Gain, Operating + References No definition available. + Details
Name: | gemi_ReceivableCryptoAssetPledgedRealizedGainOperating
Namespace Prefix: | gemi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Receivable Crypto Asset Pledged, Unrealized Gain (Loss), Operating + References No definition available. + Details
Name: | gemi_ReceivableCryptoAssetPledgedUnrealizedGainLossOperating
Namespace Prefix: | gemi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase in crypto asset from addition. 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 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476162/350-60-50-3 + Details
Name: | us-gaap_CryptoAssetAddition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of decrease in crypto asset from disposition. 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 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476162/350-60-50-3 + Details
Name: | us-gaap_CryptoAssetDisposition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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 -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 1 -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 + Details
Name: | us-gaap_CryptoAssetFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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 + Details
Name: | us-gaap_CryptoAssetPurchase
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of realized gain from remeasurement of crypto asset, classified as operating. 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 (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476162/350-60-50-3 + Details
Name: | us-gaap_CryptoAssetRealizedGainOperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of realized loss from remeasurement of crypto asset, classified as operating. 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 (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476162/350-60-50-3 + Details
Name: | us-gaap_CryptoAssetRealizedLossOperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_CryptoAssetRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_CryptoAssetSale
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized gain (loss) from remeasurement of crypto asset, classified as operating. 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 + Details
Name: | us-gaap_CryptoAssetUnrealizedGainLossOperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_CryptoAssetAxis=gemi_BitcoinMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CryptoAssetAxis=gemi_EtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CryptoAssetAxis=srt_CryptoAssetOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |