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Revenue from Contracts with Customers - Narrative (Details) | 9 Months Ended
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Sep. 30, 2025 ProductCategory
Revenue from Contract with Customer [Abstract] |
Number of product categories | 3

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- Definition Revenue from Contract with Customer, Number Of Product Categories + References No definition available. + Details
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Namespace Prefix: | lnth_
Data Type: | xbrli:integerItemType
Balance Type: | na
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