Bud is right. These like good lighting. I have mine about ten inches from a south facing window and they go outside in the summer and get direct morning sun. Watering depends on temperature. Hot temps (above 80'F), water often, cooler weather, keep dryer. As the canes are green, you should get a new growth from the bottom. Good luck!
I gave a Dendrobium tanii/bracteosum too much love and killed all its roots off, but now about 6 months later, it's decided to put out some keikis on the stems, which now get regular misting to keep the roots growing.
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