#edit-field-tg-market-not option:not([value='_none']) {
  display: none;
}

#edit-field-tg-market-not option.tg-show-market,
option.tg-show-market {
  display: block;
}

#edit-field-tg-market-not option.tg-hide-market,
option.tg-hide-market {
  display: none;
}