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v3.25.3

Revenue - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |  |
Recognized revenue related to contract liabilities | $ 2.1 | $ 2.1

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- Definition Contract With Customer, Liability, Revenue Recognized, Excluding Opening Balance + References No definition available. + Details
Name: | gemi_ContractWithCustomerLiabilityRevenueRecognizedExcludingOpeningBalance
Namespace Prefix: | gemi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration