leafless dendrobium

[Rhonda Svoboda]

Hello All:
I recently purchased a Dendrobium unicum in spike. It looked healthy but last week its blooms fell off along with the leaves. I know some dendrobiums do this annualy as part of their growth cycle but this usually happens in winter.
The canes are green-does this mean the plant is still alive? Or is this orchid dead? I do have another dendrobium that's doing well but that's evergreen.
Any suggestions?
Thanks