The amount of customer advances for sale of the product under the terms of the agreement.

No definition available.

Name:	lci_CustomerAdvancesForProduct
Namespace Prefix:	lci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	lci_DistributionAndTransitionSupportAgreementLineItems
Namespace Prefix:	lci_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of estimated net sales for guarantee gross profit to the company on sale of the product under the terms of the agreement.

+ References

No definition available.

+ Details

Name:	lci_EstimatedNetSalesForGuaranteeGrossProfitUnderAgreement
Namespace Prefix:	lci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The minimum amount of gross profit will guarantee to the company on sale of the product under the terms of the agreement.

+ References

No definition available.

+ Details

Name:	lci_MinimumGuaranteeGrossProfitOnProductSaleUnderAgreement
Namespace Prefix:	lci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash inflow for upfront payment to the company on sale of the product under the terms of the agreement.

+ References

No definition available.

+ Details

Name:	lci_ProceedsFormUpfrontPaymentUnderAgreement
Namespace Prefix:	lci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of upfront payment receivable by the company on sale of the product under the terms of the agreement.

+ References

No definition available.

+ Details

Name:	lci_UpfrontPaymentBalance
Namespace Prefix:	lci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_TypeOfArrangementAxis=lci_DistributionAndTransitionSupportAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=lci_AmnealPharmaceuticalsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=lci_LevothyroxineSodiumTabletsUspMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Amneal Distribution and Transition Support Agreement (Details) - Amneal Agreement - Amneal - Levothyroxine Sodium Tablets USP - USD ($) $ in Millions	Dec. 01, 2018	Nov. 09, 2018	Feb. 01, 2019
Distribution and Transition Support Agreement
Upfront payment		$ 50.0
Minimum guarantee gross profit		50.0
Net sales for guarantee gross profit		$ 80.0
Proceeds form upfront payment	$ 43.0
Remaining upfront payment receivable			$ 7.0