Help with a tiny Cattleya

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Hi everyone, I have just joined your forum now that I am officially addicted to orchids Two years ago I was given 2 phalaenopsis orchids, and they are putting out their first flower spikes! I am so excited and can't wait to see them flower.

I went to Lowe's yesterday and saw this pitiful little Cattleya on a bottom shelf in the dark marked down. I persuaded them to give it to me for 2.00, brought it home and when I unpackaged it, all the leaves (which were brown) fell off. All that is left is a tiny little root ball that was completely dehydrated. I don't think the poor thing was every watered. I soaked the roots, soaked the small bark pieces, put both in a clear plastic container and set it in a East facing window to see if there is any way I can revive it. It might already be gone, but does anyone have any suggestions that might bring it back to life?