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v3.21.2

Other Assets (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($)
Other Assets [Line Item] |
Advance payment for purchase of trading software | $ 5,950,000
Purchase price of portfolio | $ 8,000,000.0

X
- Definition Amount of advance payment for purchase of trading software. + References No definition available. + Details
Name: | lghl_AdvancePaymentsForPurchaseOfTradingSoftware
Namespace Prefix: | lghl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | lghl_OtherAssetsDetailsLineItems
Namespace Prefix: | lghl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of purchase price of portfolio. + References No definition available. + Details
Name: | lghl_PurchasePriceOfPortfolio
Namespace Prefix: | lghl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant