.graphDescription section {
    display: none;
    position: absolute;
    top: 18px;
    right: 0;

    background: #eee;
    color: black;
    padding: 5px 10px 15px;
    font-size: 80%;
    width: 30%;
    min-width: 300px;
    word-wrap: break-word;
    border-radius: 2px 0px 2px 2px;
}

.graphDescription section h4 {
    font-size: 100%;
    font-weight: normal;
    margin: 15px 0 0;
}

.graphDescription section p {
    margin: 5px 0 0;
}

.graphDescription:hover {
    cursor: default;
    background: #eee;
    border-radius: 2px 2px 0px 0px;
}
.graphDescription:hover section,
.graphDescription section:hover {
    display: block;
}

.graphDescription section {
    display: none;
    z-index: 1;
    position: absolute;
    top: 18px;
    right: 0;

    background: #eee;
    color: black;
    padding: 5px 10px 15px;
    font-size: 80%;
    width: 30%;
    min-width: 300px;
    word-wrap: break-word;
    border-radius: 2px 0px 2px 2px;
}

.graphDescription section h4 {
    font-size: 100%;
    font-weight: normal;
    margin: 15px 0 0;
}

.graphDescription section p {
    margin: 5px 0 0;
}

.graphDescription:hover {
    cursor: default;
    background: #eee;
    border-radius: 2px 2px 0px 0px;
}
.graphDescription:hover section,
.graphDescription section:hover {
    display: block;
}

Fix stacking of description layer
Fix stacking of description layer
