<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Version>2.4.0.8</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>91</ContextCount>
  <ElementCount>204</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>31</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>101 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>102 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/BalanceSheet</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>103 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/BalanceSheetParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>104 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/IncomeStatement</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>105 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/CashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>106 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Nature of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Nature of Operations</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>107 - Disclosure - Net Loss Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock</Role>
      <ShortName>Net Loss Per Share</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>108 - Disclosure - Accounts Receivable -Project Revenue and Project Costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsOtherAssetsDisclosureTextBlock</Role>
      <ShortName>Accounts Receivable -Project Revenue and Project Costs</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>109 - Disclosure - Accounts Payable and Accrued Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsAccountsPayableAndAccruedLiabilitiesDisclosureTextBlock</Role>
      <ShortName>Accounts Payable and Accrued Liabilities</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>110 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock</Role>
      <ShortName>Income Taxes</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>111 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock</Role>
      <ShortName>Commitments and Contingencies</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>112 - Disclosure - Research and Development Costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsResearchDevelopmentAndComputerSoftwareDisclosureTextBlock</Role>
      <ShortName>Research and Development Costs</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>113 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlock</Role>
      <ShortName>Stockholders' Equity</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>114 - Disclosure - Business Segment Results</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock</Role>
      <ShortName>Business Segment Results</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>115 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsSubsequentEventsTextBlock</Role>
      <ShortName>Subsequent Events</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>117 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>119 - Disclosure - Accounts Payable and Accrued Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsAccountsPayableAndAccruedLiabilitiesDisclosureTextBlockTables</Role>
      <ShortName>Accounts Payable and Accrued Liabilities (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>120 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlockTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>121 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>122 - Disclosure - Stockholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlockTables</Role>
      <ShortName>Stockholders' Equity (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>123 - Disclosure - Business Segment Results (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables</Role>
      <ShortName>Business Segment Results (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>124 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Nature of Operations (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlockDetails</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Nature of Operations (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>125 - Disclosure - Accounts Receivable -Project Revenue and Project Costs (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureOtherAssetsDisclosureTextBlockDetails</Role>
      <ShortName>Accounts Receivable -Project Revenue and Project Costs (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>126 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureIncomeTaxDisclosureTextBlockDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>127 - Disclosure - Commitments and Contingencies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureCommitmentsAndContingenciesDisclosureTextBlockDetails</Role>
      <ShortName>Commitments and Contingencies (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>128 - Disclosure - Research and Development Costs (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureResearchDevelopmentAndComputerSoftwareDisclosureTextBlockDetails</Role>
      <ShortName>Research and Development Costs (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>129 - Disclosure - Stockholders' Equity (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureStockholdersEquityNoteDisclosureTextBlockDetails</Role>
      <ShortName>Stockholders' Equity (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>130 - Disclosure - Subsequent Events (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureSubsequentEventsTextBlockDetails</Role>
      <ShortName>Subsequent Events (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>133 - Disclosure - Schedule of Accounts Payable and Accrued Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlockDetails</Role>
      <ShortName>Schedule of Accounts Payable and Accrued Liabilities (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>134 - Disclosure - Schedule of Deferred Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlockDetails</Role>
      <ShortName>Schedule of Deferred Tax Assets and Liabilities (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>135 - Disclosure - Schedule of Future Minimum Rental Payments for Operating Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlockDetails</Role>
      <ShortName>Schedule of Future Minimum Rental Payments for Operating Leases (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>136 - Disclosure - Schedule of Share-based Compensation, Stock Options, Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlockDetails</Role>
      <ShortName>Schedule of Share-based Compensation, Stock Options, Activity (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>137 - Disclosure - Schedule of Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlockDetails</Role>
      <ShortName>Schedule of Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>138 - Disclosure - Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlockDetails</Role>
      <ShortName>Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>139 - Disclosure - Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsVestedAndExpectedToVestTableTextBlockDetails</Role>
      <ShortName>Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>140 - Disclosure - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlockDetails</Role>
      <ShortName>Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>141 - Disclosure - Schedule of Segment Reporting Information, by Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltbridge.com/taxonomy/role/DisclosureScheduleOfSegmentReportingInformationBySegmentTextBlockDetails</Role>
      <ShortName>Schedule of Segment Reporting Information, by Segment (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Element us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent had a mix of decimals attribute values: -6 0.</Log>
    <Log type="Info">Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -6 0.</Log>
    <Log type="Info">Element us-gaap_OperatingLeasesRentExpenseNet had a mix of decimals attribute values: -6 0.</Log>
    <Log type="Info">Element us-gaap_ShareBasedCompensation had a mix of decimals attribute values: -3 0.</Log>
    <Log type="Info">'Monetary' elements on report '129 - Disclosure - Stockholders' Equity (Narrative) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 102 - Statement - Condensed Consolidated Balance Sheets</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Sep. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2011'</Log>
    <Log type="Info">Process Flow-Through: 103 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 104 - Statement - Condensed Consolidated Statements of Operations</Log>
    <Log type="Info">Process Flow-Through: 105 - Statement - Condensed Consolidated Statements of Cash Flows</Log>
  </Logs>
  <InputFiles>
    <File>ltbr-20130930.xml</File>
    <File>ltbr-20130930.xsd</File>
    <File>ltbr-20130930_cal.xml</File>
    <File>ltbr-20130930_def.xml</File>
    <File>ltbr-20130930_lab.xml</File>
    <File>ltbr-20130930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
