XML 52 R35.htm IDEA: XBRL DOCUMENT
v3.19.1

Summary of Significant Accounting Policies Segment Information and Signficant Customers (Details) - segment | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Accounting Policies [Abstract] |  |  |
Number of operating segments | 1 |  |
Entity Wide Revenue Sanofi Percentage | 53.00% | 66.00% | 90.00%
Biologics customer concentration | 25.00% |  |
LXRX Diplomat customer concentration | 14.00% |  |
Entity Wide Revenue Ipsen Percentage |  | 18.00% |

X
- Definition Percentage of revenue generated from Ipsen Pharma SAS that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | lxrx_EntityWideRevenueIpsenPercentage
Namespace Prefix: | lxrx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue generated from Sanofi that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | lxrx_EntityWideRevenueSanofiPercentage
Namespace Prefix: | lxrx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition LXRX Biologics customer concentration - represents percent of revenue that Biologics contributes to total revenues + References No definition available. + Details
Name: | lxrx_LXRXBiologicscustomerconcentration
Namespace Prefix: | lxrx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition LXRX Diplomat customer concentration - represents the percent of revenue that Diplomat contributes to revenues + References No definition available. + Details
Name: | lxrx_LXRXDiplomatcustomerconcentration
Namespace Prefix: | lxrx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
Name: | us-gaap_NumberOfOperatingSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration