How to fix responsive error

The problem is that when I resize the window to small size (mobile) it looks fine, but when i revert it to large the canvas extends outside its parent column.

Fiddle

I am using bootstrap 3.3. But i have to tell that,no problem with other boxes, it doesn't go out of boxes expect this graph

    .ibox-title {
      -moz-border-bottom-colors: none;
      -moz-border-left-colors: none;
      -moz-border-right-colors: none;
      -moz-border-top-colors: none;
      background-color: #ffffff;
      border-color: #e7eaec;
      border-image: none;
      border-style: solid solid none;
      border-width: 4px 0px 0;
      color: inherit;
      margin-bottom: 0;
      padding: 14px 15px 7px;
      height: 48px;
      border-top-left-radius: 9px;
      border-top-right-radius: 9px;
    }
    .ibox-content {
      background-color: #ffffff;
      color: inherit;
      padding: 15px 20px 20px 20px;
      border-color: #e7eaec;
      border-image: none;
      border-style: solid solid none;
      border-width: 1px 0px;
      border-bottom-left-radius: 9px;
      border-bottom-right-radius: 9px;
    }
    canvas {
      background: pink;
    }

<div class="row">
  <div class="col-lg-6">
    <div class="ibox float-e-margins">

      <div class="ibox-content" style="border-radius: 10px;">
        <div>
          <h3 class="font-bold no-margins">
                               Statistics Graph
                            </h3>
        </div>

        <div class="m-t-sm">
          <div class="row">
            <div class="col-md-12">
              <div>
                <canvas id="lineChart" height="114"></canvas>
              </div>
            </div>
          </div>

        </div>
        <div class="m-t-md">
          <small class="pull-right">
                                        <i class="fa fa-clock-o"> </i>
                                        Update on 16.07.2015
                                    </small>
          <small>
                                       <strong>Analysis of sales:</strong> The value has been changed over time,sdasdas as been changed over time,sdasdas
                                   </small>
        </div>
      </div>
    </div>
  </div>