.sidebar {
  .make-sm-column(@sidebar-sm-columns);

  .widget {
    margin-bottom: 30px;

    h4 {
      margin: 0 0 15px 0;
      padding: 10px 15px;
      color: #fff;
      background-color: @brand-primary;
    }
  }

  .widget_text {
    .textwidget {
      padding: 0 15px;
    }

    .author-image {
      padding-right: 15px;
    }

    .author-name {
      margin-top: 0;
      font-size: @font-size-large;
    }

    .author-profile {
      overflow: hidden;
    }
  }

  .widget_categories {
    ul {
      padding: 0 15px;
      list-style-type: none;
    }
  }
}

.sidebar {
  .make-sm-column(@sidebar-sm-columns);

  .widget {
    margin-bottom: 30px;

    h4 {
      margin: 0 0 15px 0;
      padding: 10px 15px;
      color: #fff;
      background-color: @brand-primary;
    }
  }

  .widget_text {
    .textwidget {
      padding: 0 15px;
    }

    .author-image {
      padding-right: 15px;
    }

    .author-name {
      margin-top: 0;
      font-size: @font-size-large;
    }

    @media (max-width: @screen-xs-max), (min-width: @screen-md-min) {
      .author-profile {
        overflow: hidden;
      }
    }
  }

  .widget_categories {
    ul {
      padding: 0 15px;
      list-style-type: none;
    }
  }
}

Change the author image as wrapping text around
Change the author image as wrapping text around
