Collaboration and Licensing Arrangement	12 Months Ended
Collaboration and Licensing Arrangement	Dec. 31, 2024
Revenue Recognition and Deferred Revenue [Abstract]
Collaboration And Licensing Arrangement	Collaboration and Licensing Arrangement On October 16, 2024, Lexicon entered into an exclusive license agreement (the “License Agreement”) with Viatris Inc. (“Viatris”) for the development and commercialization of sotagliflozin in all markets outside of the United States and Europe (the “Licensed Territory”). Under the License Agreement, Lexicon granted Viatris an exclusive, royalty-bearing right and license under its patent rights and know-how to develop and commercialize sotagliflozin in the Licensed Territory. Viatris is responsible for all regulatory and commercialization activities for sotagliflozin in the Licensed Territory as well as conducting any additional clinical trials required to obtain such regulatory approvals. Lexicon and Viatris have agreed to enter into a manufacturing and supply agreement pursuant to which Lexicon will supply the development and commercial requirements of sotagliflozin of Viatris, and Viatris will pay an agreed upon transfer price for such supply. Under the License Agreement, Lexicon received an upfront payment of $25.0 million and is also eligible to receive (a) up to an aggregate of $12.0 million upon the achievement of specified regulatory milestones, (b) up to an aggregate of $185.0 million upon the achievement of specified sales milestones and (c) tiered royalties ranging from low double-digit to upper-teens percentages of annual net sales of sotagliflozin in the Licensed Territory. In accordance with ASC 606, Revenue from Contracts with Customers, the Company recognized the upfront cash payment of $25.0 million as licensing revenue for the year ended December 31, 2024 at the outset of the License Agreement, based on the satisfaction of its performance obligation upon delivery of an exclusive right and license under its patent rights and know-how to develop and commercialize sotagliflozin in the Licensed Territory. Any future milestone or royalty payments that the Company would be eligible to receive were excluded from the upfront payment, as all milestone or royalty amounts were fully constrained based on the probability of achievement. Any future milestone payments or royalties the Company is entitled to receive upon achievement of future sales of the licensed products by Viatris will be recognized when the related sales occur. Pursuant to ASC 606, the Company identified the exclusive right and license under its patent rights and know-how to develop and commercialize sotagliflozin in the Licensed Territory as one distinct performance obligation. The Company further evaluated its stated intent in the Licensing Agreement to enter into a separate manufacturing and supply agreement related to supply of the licensed products to Viatris. The Company concluded for accounting purposes that there was no separate material right or performance obligation related to the separate manufacturing agreement at the inception of the Licensing Agreement primarily given (i) supply agreement pricing subject to reasonable and customary contract manufacturing terms reflecting a reasonable stand-alone selling price without a significant and incremental discount and (ii) no obligation by Viatris to purchase any minimum amount or quantities of the supply from the Company. The Company also concluded that the Licensing Agreement is not a collaborative agreement under ASC 808, Collaborative arrangements, as Viatris is responsible for all regulatory and commercialization activities for sotagliflozin in the Licensed Territory as well as conducting any additional clinical trials required to obtain such regulatory approvals.