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Related party transactions (Narrative) (Details) (USD $)
 3 Months Ended
Apr. 30, 2015
Related Party Transactions 1 522lbsr_RelatedPartyTransactionsZeroTwoEightSevenFiveZeroLFNFourmTwoWftSixpk
Related Party Transactions 2 $ 4,698lbsr_RelatedPartyTransactionsZeroTwoEightSevenFiveZerogPxqNgFiveqpQKg
Related Party Transactions 3 405,359lbsr_RelatedPartyTransactionsZeroTwoEightSevenFiveZeroNineXDvWRpwhDNineZero
Related Party Transactions 4 $ 15,625lbsr_RelatedPartyTransactionsZeroTwoEightSevenFiveZeroBFourpPsMLfWnkr