.tooltip {
    position: relative;
    float: right;
    opacity: 1;
    z-index: 50;
    text-align: left;
}
.tooltip .tooltiptext {
    visibility: hidden;
    width: 180px;
    background-color: #666;
    color: #FFF;
    text-align: center;
    border-radius: 6px;
    padding: 5px 10px; 
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -90px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.75rem;
}
.tooltip .tooltiptext::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #555 transparent transparent transparent;
}
.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}
div#proj_table.flexigrid { overflow: visible; }
div#proj_table.flexigrid div.mDiv { overflow: visible; }
div#proj_table.flexigrid div.hDiv { overflow: visible; }
div#proj_table.flexigrid div.bDiv { overflow: visible; }
div#proj_table.flexigrid div.hDiv th, .flexigrid div.bDiv td { overflow: visible; }
div#proj_table.flexigrid div.hDiv th div, .flexigrid div.bDiv td div { overflow: visible; }