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v3.3.1.900

Buildings and Land for Sale (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Property, Plant and Equipment Impairment or Disposal [Abstract] |  |  |  |
Fair Value of Assets to be Sold |  | $ 20,300 | $ 23,800 |
Asset Impairment Charges |  | $ 3,597 | $ 13,102 | $ 0
Real Estate Selling Price | $ 21,200 |  |  |

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- Definition Fair value amount as of the balance sheet date of land and buildings that will be sold. + References No definition available. + Details
Name: | lxrx_FairValueofAssetstobeSold
Namespace Prefix: | lxrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition In January 2016, Lexicon entered into a Real Estate Purchase and Sale Agreement. This represents the selling price of Lexicon's land and buildings. + References No definition available. + Details
Name: | lxrx_RealEstateSellingPrice
Namespace Prefix: | lxrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentImpairmentOrDisposalAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration