Benefit Plans (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Oct. 31, 2024	Dec. 31, 2024	Mar. 31, 2025
Retirement Benefits [Abstract]
Percentage of salary	80.00%
Percentage of bonus	80.00%	25.00%
Percentage of board fees	100.00%
Defined contribution plan, contribution, vesting period	5 years
Assets			$ 0.7
Liabilities			$ 0.6

Deferred Compensation Arrangement with Individual, Maximum Percentage Of Board Fees

No definition available.

Name:	lnth_DeferredCompensationArrangementWithIndividualMaximumPercentageOfBoardFees
Namespace Prefix:	lnth_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Deferred Compensation Arrangement with Individual, Maximum Percentage Of Bonus

+ References

No definition available.

+ Details

Name:	lnth_DeferredCompensationArrangementWithIndividualMaximumPercentageOfBonus
Namespace Prefix:	lnth_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Deferred Compensation Arrangement with Individual, Maximum Percentage Of Salary

+ References

No definition available.

+ Details

Name:	lnth_DeferredCompensationArrangementWithIndividualMaximumPercentageOfSalary
Namespace Prefix:	lnth_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Deferred Compensation Arrangement with Individual, Vesting Period

+ References

No definition available.

+ Details

Name:	lnth_DeferredCompensationArrangementWithIndividualVestingPeriod
Namespace Prefix:	lnth_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_DeferredCompensationPlanAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant