v3.3.1.900
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2015
Mar. 08, 2016
Jun. 30, 2015
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2015    
Trading Symbol ltbr    
Entity Registrant Name LIGHTBRIDGE Corp    
Entity Central Index Key 0001084554    
Current Fiscal Year End Date --12-31    
Entity Filer Category Smaller Reporting Company    
Entity Common Stock, Shares Outstanding   20,328,957  
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well Known Seasoned Issuer No    
Entity Public Float     $ 18,041,545
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY