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Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2017
Commitments and Contingencies [Abstract]
Commitments and Contingencies Disclosure	Commitments and Contingencies Operating Lease Obligations: A Lexicon subsidiary leases office space in Basking Ridge, New Jersey under an operating lease agreement, the term of which began in June 2015 and terminates in December 2022. Rent expense is recognized on a straight-line basis over the lease term. Lexicon is the guarantor of the obligations of its subsidiary under this lease agreement. The maximum potential amount of future payments the Company could be required to make under this agreement is $3.6 million as of March 31, 2017. Additionally, Lexicon leases certain equipment under operating leases. Legal Proceedings. Lexicon is from time to time party to claims and legal proceedings that arise in the normal course of its business and that it believes will not have, individually or in the aggregate, a material adverse effect on its results of operations, financial condition or liquidity.