Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Narrative) (Details)

v2.4.1.9
Subsequent Events (Narrative) (Details) (USD $)
 3 Months Ended 12 Months Ended 0 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Dec. 31, 2011
Apr. 08, 2015
Apr. 09, 2015
Stock options granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod 579,429us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice $ 2.55us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice      
Risk-free interest rate   1.68%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 3.35%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate    
Volitility rate   90.44%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 94.32%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate    
Expected term   5 years 10 years    
Subsequent Event [Member] | 2006 Stock Plan [Member] | Employees and Consultants [Member]          
Stock options granted       463,192us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroZeroSixStockPlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		47,017us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroZeroSixStockPlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Subsequent Event [Member] | 2015 Equity Incentive Plan [Member]          
Stock options granted 3,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		       
Subsequent Event [Member] | 2015 Equity Incentive Plan [Member] | Employees and Consultants [Member]          
Stock options granted       148,845us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		15,109us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price         1.26us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value         1.06us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Risk-free interest rate         1.49%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Volitility rate         86.86%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Expected term         10 years
Subsequent Event [Member] | 2015 Equity Incentive Plan [Member] | Directors [Member]          
Stock options granted       112,996us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_DirectorsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price       1.26us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_DirectorsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value       1.06us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_DirectorsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		 
Risk-free interest rate       1.49%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_DirectorsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		 
Volitility rate       86.86%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_DirectorsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		 
Expected term       10 years  
Subsequent Event [Member] | 2015 Equity Incentive Plan [Member] | Minimum [Member] | Employees and Consultants [Member]          
Stock options granted         84,129us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Subsequent Event [Member] | 2015 Equity Incentive Plan [Member] | Maximum [Member] | Employees and Consultants [Member]          
Stock options granted       483,668us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ ltbr_EquityTransactionAxis
= ltbr_TwoZeroOneFiveEquityIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ltbr_EmployeesAndConsultantsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember