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v3.25.1

Fixed Assets - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Depreciation expense | $ 0.1 | $ 0.1
Maximum [Member] |  |
Depreciation expenses related to sublet assets | $ 0.1 | $ 0.1

X
- Definition The amount of depreciation expenses recognized in the period, excluding depreciation for leased assets as part of a sublease agreement. + References No definition available. + Details
Name: | lrmr_DepreciationExpenseExcludingLeasedAssets
Namespace Prefix: | lrmr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of depreciation expense recognized in the period related to leased assets as part of a sublease agreement. + References No definition available. + Details
Name: | lrmr_DepreciationExpensesRelatedToSubletAssets
Namespace Prefix: | lrmr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |