2.4.0.8114 - Disclosure - Common stock (Tables)truefalsefalse1false
falsefalsecx_01_February_2013_TO_31_July_2013http://www.sec.gov/CIK0001172178duration2013-02-01T00:00:002013-07-31T00:00:001false
4lbsr_ScheduleOfStockholdersEquityNoteWarrantsOrRightsActivityTextBlocklbsr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel| 1falsefalsefalse00<table border="0" cellpadding="0" cellspacing="0" style="border-color: black; border-collapse: collapse; font-size: 10pt; font-family: times new roman,times,serif;" width="90%">
<tr valign="top">
<td align="left"> </td>
<td align="left" width="1%"> </td>
<td align="center" nowrap="nowrap" width="12%">Number of whole share</td>
<td align="center" nowrap="nowrap" width="2%"> </td>
<td align="center" nowrap="nowrap" width="1%"> </td>
<td align="center" nowrap="nowrap" width="12%">Weighted average exercise</td>
<td align="left" width="2%"> </td>
</tr>
<tr valign="top">
<td align="left"> </td>
<td align="left" style="BORDER-BOTTOM: #000000 1px solid" width="1%"> </td>
<td align="center" nowrap="nowrap" style="BORDER-BOTTOM: #000000 1px solid" width="12%">purchase warrants</td>
<td align="center" nowrap="nowrap" width="2%"> </td>
<td align="center" nowrap="nowrap" style="BORDER-BOTTOM: #000000 1px solid" width="1%"> </td>
<td align="center" nowrap="nowrap" style="BORDER-BOTTOM: #000000 1px solid" width="12%">price per share</td>
<td align="left" style="BORDER-BOTTOM: #000000 1px solid" width="2%"> </td>
</tr>
<tr valign="top">
<td align="left" bgcolor="#e6efff">Outstanding, January 31, 2013</td>
<td align="left" bgcolor="#e6efff" width="1%"> </td>
<td align="right" bgcolor="#e6efff" width="12%">
94,963,129
</td>
<td align="left" bgcolor="#e6efff" width="2%"> </td>
<td align="left" bgcolor="#e6efff" width="1%">$</td>
<td align="right" bgcolor="#e6efff" width="12%">
0.058
</td>
<td align="left" bgcolor="#e6efff" width="2%"> </td>
</tr>
<tr valign="top">
<td align="left">Issued</td>
<td align="left" width="1%"> </td>
<td align="right" width="12%">
22,976,178
</td>
<td align="left" width="2%"> </td>
<td align="left" width="1%"> </td>
<td align="right" width="12%">
0.015
</td>
<td align="left" width="2%"> </td>
</tr>
<tr valign="top">
<td align="left" bgcolor="#e6efff">Exercised</td>
<td align="left" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="1%"> </td>
<td align="right" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="12%">
(7,297,607
</td>
<td align="left" bgcolor="#e6efff" width="2%">)</td>
<td align="left" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="1%"> </td>
<td align="right" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="12%">
0.002
</td>
<td align="left" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="2%"> </td>
</tr>
<tr>
<td> </td>
<td width="1%"> </td>
<td width="12%"> </td>
<td width="2%"> </td>
<td width="1%"> </td>
<td width="12%"> </td>
<td width="2%"> </td>
</tr>
<tr valign="top">
<td align="left" bgcolor="#e6efff">Outstanding, July 31, 2013</td>
<td align="left" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="1%"> </td>
<td align="right" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="12%">
110,641,700
</td>
<td align="left" bgcolor="#e6efff" width="2%"> </td>
<td align="left" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="1%">$</td>
<td align="right" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="12%">
0.052
</td>
<td align="left" bgcolor="#e6efff" style="BORDER-BOTTOM: #000000 1px solid" width="2%"> </td>
</tr>
<tr valign="top">
<td align="left">Exercisable, July 31, 2013</td>
<td align="left" style="BORDER-BOTTOM: #000000 1px solid" width="1%"> </td>
<td align="right" style="BORDER-BOTTOM: #000000 1px solid" width="12%">
110,610,450
</td>
<td align="left" width="2%"> </td>
<td align="left" style="BORDER-BOTTOM: #000000 1px solid" width="1%">$</td>
<td align="right" style="BORDER-BOTTOM: #000000 1px solid" width="12%">
0.052
</td>
<td align="left" style="BORDER-BOTTOM: #000000 1px solid" width="2%"> </td>
</tr>
</table>falsefalsefalse | nonnum:textBlockItemTypenaSchedule of Stockholders' Equity Note, Warrants or Rights, Activity [Table Text Block]No definition available.false0
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