Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable -Project Revenue and Reimbursable Project Costs (Narrative) (Details)

v2.4.1.9
Accounts Receivable -Project Revenue and Reimbursable Project Costs (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Lloyd Register Contract [Member]      
Major customer revenue percentage 58.00%ltbr_MajorCustomerRevenuePercentage
/ us-gaap_MajorCustomersAxis
= ltbr_LloydRegisterContractMember
   
Approximations [Member]      
Major customer revenue percentage 78.00%ltbr_MajorCustomerRevenuePercentage
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember
   
Unbilled receivable $ 0us-gaap_UnbilledContractsReceivable
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember
$ 0.1us-gaap_UnbilledContractsReceivable
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember
 
Approximations [Member] | ENEC and FANR Projects [Member]      
Accounts Receivable $ 0.2us-gaap_AccountsReceivableNet
/ us-gaap_MajorCustomersAxis
= ltbr_EnecAndFanrProjectsMember
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember
$ 0.5us-gaap_AccountsReceivableNet
/ us-gaap_MajorCustomersAxis
= ltbr_EnecAndFanrProjectsMember
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember
 
Major customer revenue percentage 34.00%ltbr_MajorCustomerRevenuePercentage
/ us-gaap_MajorCustomersAxis
= ltbr_EnecAndFanrProjectsMember
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember
  86.00%ltbr_MajorCustomerRevenuePercentage
/ us-gaap_MajorCustomersAxis
= ltbr_EnecAndFanrProjectsMember
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember
Approximations [Member] | ENEC [Member]      
Major customer revenue percentage 78.00%ltbr_MajorCustomerRevenuePercentage
/ us-gaap_MajorCustomersAxis
= ltbr_ENECMember
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember
92.00%ltbr_MajorCustomerRevenuePercentage
/ us-gaap_MajorCustomersAxis
= ltbr_ENECMember
/ us-gaap_StatementScenarioAxis
= ltbr_ApproximationsMember