Are you asking if the hover tool can work when hovering over cells in the table? Is so, no that is not currently supports, the hover tool is a plot tool and only works when hovering over plots. That might be a feature that could be investigated at some point, however. If you'd like to submit a feature request, our issue tracker is here:
Finally, I'll mention it is definitely possible to integrate Bokeh-created plots with other JavaScipt directly, so its potentially possible you could make something like this with some custom JS.