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Buildings and Land for Sale | 12 Months Ended
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Dec. 31, 2015
Property, Plant and Equipment Impairment or Disposal [Abstract] |
Real Estate Disclosure [Text Block] | Buildings and Land for Sale In 2014, Lexicon reclassified its buildings and land to assets held for sale on the consolidated balance sheet, as it intended to sell these assets. In the fourth quarter of 2015, Lexicon made a change to its plan of sale and reclassified its buildings and land as assets held and used in accordance with the accounting guidance regarding selling assets with a leaseback requirement. The Company estimated the fair value of the net assets to be sold at approximately $20.3 million and $23.8 million as of December 31, 2015 and 2014, respectively, which represents estimated selling price less costs to sell. This resulted in an impairment loss on the buildings of $3.6 million and $13.1 million in the years ended December 31, 2015 and 2014, respectively, which were recorded in impairment loss on buildings in the accompanying consolidated statements of comprehensive loss. The fair value of the net assets to be sold was determined using Level 2 inputs using sales prices in similar real estate sales and offers received from potential purchasers of the building. In January 2016, Lexicon entered into a Real Estate Purchase and Sale Agreement (“Real Estate Agreement”) with TC Houston Office Development, Inc. (“Purchaser).” Under the Real Estate Agreement, Lexicon agreed to sell its facilities in The Woodlands, Texas to Purchaser for a purchase price of $21.2 million. Such sale is subject to normal and customary closing conditions, including a study period, which extends until March 21, 2016, subject to extension, during which Purchaser may conduct inspections, analyses and other studies of the property and may terminate the Real Estate Agreement in its discretion. Such sale is also subject to the negotiation and execution by the parties of a leaseback agreement with respect to a portion of the property concurrently with closing.

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- Definition The entire disclosure for certain real estate investment financial statements, real estate investment trust operating support agreements, real estate owned, retail land sales, time share transactions, as well as other real estate related disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule III -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Subparagraph 4 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a -Article 5 + Details
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