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Subsequent Event (Details)
May 20, 2015
Mar. 31, 2015
Dec. 31, 2014
Subsequent Event [Abstract]      
Common Stock, Shares Authorized   900,000,000us-gaap_CommonStockSharesAuthorized 900,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, Shares Authorized After Reverse Stock Split 225,000,000lxrx_CommonStockSharesAuthorizedAfterReverseStockSplit