XML 80 R38.htm IDEA: XBRL DOCUMENT v2.4.1.9
Summary of Significant Accounting Policies Segment Information and Signficant Customers (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Revenue, Major Customer      
Entity Wide Revenue Ipsen Percentage 94.00%lxrx_EntityWideRevenueIpsenPercentage    
Entity-Wide Revenue, McNair Medical Institute, Percentage   57.00%lxrx_EntityWideRevenueMcNairMedicalInstitutePercentage  
Entity-Wide Revenue, Taconic Farms, Percentage   33.00%lxrx_EntityWideRevenueTaconicFarmsPercentage 68.00%lxrx_EntityWideRevenueTaconicFarmsPercentage
Entity-Wide Revenue, Deltagen, Percentage     25.00%lxrx_EntityWideRevenueDeltagenPercentage