2.4.0.8116 - Disclosure - Common stock (Narrative) (Details)truefalsefalse1false USDfalsefalse$cx_01_February_2013_TO_31_July_2013http://www.sec.gov/CIK0001172178duration2013-02-01T00:00:002013-07-31T00:00:00pureStandardhttp://www.xbrl.org/2003/instancepure0yStandardhttp://www.xbrl.org/2009/utrYutr0sharesStandardhttp://www.xbrl.org/2003/instanceshares0usd_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoSzpmTmTwoFiveFiveDZeroTlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2287440522874405falsefalsefalsexbrli:sharesItemTypesharesCommon Stock 1No definition available.false1Common Stock 12false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoClZeroSevendkBbhNinekvlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse200000200000USD$falsetruefalsexbrli:monetaryItemTypemonetaryCommon Stock 2No definition available.false2Common Stock 23false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoFivefJRNineDZsOneklllbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse34482763448276falsefalsefalsexbrli:sharesItemTypesharesCommon Stock 3No definition available.false1Common Stock 34false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoMZRNinepdXLVnpylbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4000040000falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 4No definition available.false2Common Stock 45false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoNinePxphwyThreeCMQRlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse0.01620.0162falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 5No definition available.false2Common Stock 56false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoSQBOnevFFiveTwoDtHxlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse15267181526718falsefalsefalsexbrli:sharesItemTypesharesCommon Stock 6No definition available.false1Common Stock 67false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwotThreeCcFsrTTPZeroylbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2000020000falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 7No definition available.false2Common Stock 78false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoThreewBJmrNinerVdyVlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse0.01830.0183falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 8No definition available.false2Common Stock 89false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoSixsrThreeSevenRVSixZerozWqlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse30336183033618falsefalsefalsexbrli:pureItemTypepureCommon Stock 9No definition available.false0Common Stock 910false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoFivezhBTzpyBlyPlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse25000002500000falsefalsefalsexbrli:sharesItemTypesharesCommon Stock 10No definition available.false1Common Stock 1011false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwotCPGccQFivedTTwoblbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse533618533618falsefalsefalsexbrli:pureItemTypepureCommon Stock 11No definition available.false0Common Stock 1112false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoXPdbFLJhMLEightGlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3127095831270958falsefalsefalsexbrli:sharesItemTypesharesCommon Stock 12No definition available.false1Common Stock 1213false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwonPDTwodXZeronLSixXqlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse255000255000falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 13No definition available.false2Common Stock 1314false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwovThCbEightTNineWDfllbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2500025000falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 14No definition available.false2Common Stock 1415false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoNineOneFiveEightOneznmRmvylbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse50005000falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 15No definition available.false2Common Stock 1516false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTworwdBSevenfbZdktFourlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2000020000falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 16No definition available.false2Common Stock 1617false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTworPQnTwoFiveJWNineSixlFivelbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1800118418001184falsefalsefalsexbrli:sharesItemTypesharesCommon Stock 17No definition available.false1Common Stock 1718false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwolDFivetEightfSCzssmlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse182043182043falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 18No definition available.false2Common Stock 1819false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoLXVNineKZktTWfrlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse0.01160.0116falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 19No definition available.false2Common Stock 1920false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwocdVCszFlVspOnelbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse0.01730.0173falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 20No definition available.false2Common Stock 2021false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoZNQcNTwoCNinePSQblbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse42639894263989falsefalsefalsexbrli:pureItemTypepureCommon Stock 21No definition available.false0Common Stock 2122false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoTfRNFiveypHHlTwoGlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse35871653587165falsefalsefalsexbrli:sharesItemTypesharesCommon Stock 22No definition available.false1Common Stock 2223false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoTwoSevenzDEightDDmvFwNinelbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse678824678824falsefalsefalsexbrli:pureItemTypepureCommon Stock 23No definition available.false0Common Stock 2324false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwokJsSevenbhWHZTvEightlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse903500903500falsefalsefalsexbrli:pureItemTypepureCommon Stock 24No definition available.false0Common Stock 2425false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoRhGSkBTwoOneEightfrxlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1.4291.429USD$falsetruefalsenum:perShareItemTypedecimalCommon Stock 25No definition available.false3Common Stock 2526false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwowcXSevenNineXSJWbTwoThreelbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse872250872250falsefalsefalsexbrli:pureItemTypepureCommon Stock 26No definition available.false0Common Stock 2627false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoFiveddTqLFmNineLCnlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse9063537590635375falsefalsefalsexbrli:pureItemTypepureCommon Stock 27No definition available.false0Common Stock 2728false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoSevengFivetSkbsdfkklbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse0.0470.047USD$falsetruefalsenum:perShareItemTypedecimalCommon Stock 28No definition available.false3Common Stock 2829false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwonlRGNknPsSixbClbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse8807287588072875falsefalsefalsexbrli:pureItemTypepureCommon Stock 29No definition available.false0Common Stock 2930false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoTwoMSTwofxSevenbFivemTSlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse0.0480.048falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 30No definition available.false2Common Stock 3031false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoDZLspxbcDtKslbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1284312843falsefalsefalsexbrli:monetaryItemTypemonetaryCommon Stock 31No definition available.false2Common Stock 3132false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoxCFiveHVTwonpCLSevenLlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4782847828USD$falsetruefalsexbrli:monetaryItemTypemonetaryCommon Stock 32No definition available.false2Common Stock 3233false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoMFiveQFZeroQRStThreelNlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse110641700110641700falsefalsefalsexbrli:pureItemTypepureCommon Stock 33No definition available.false0Common Stock 3334false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoVGEightmpTEightGqBOneSixlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse110610450110610450falsefalsefalsexbrli:pureItemTypepureCommon Stock 34No definition available.false0Common Stock 3435false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoNinelmgNineFXFourypRqlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1.31.3falsefalsefalsexbrli:decimalItemTypedecimalCommon Stock 35No definition available.false256Common Stock 3536false 4lbsr_CommonStockZeroOneSevenFourFourTwoTwoZeroTwoVFKQgNrxKKqzlbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse0.0520.052falsefalsefalsexbrli:pureItemTypepureCommon Stock 36No definition available.false0Common Stock 36falseCommon stock (Narrative) (Details) (USD $)NoRoundingNoRoundingNoRoundingUnKnowntruefalsefalseSheethttp://www.libertystaruranium.com/taxonomy/role/DisclosureStockholdersEquityNoteDisclosureTextBlockDetails136