should I trim the stem?

[billandalisha]

Hello we are a first time orchid users, We were amazed how long the flowers lasted on our orchid. Now all the flowers has fallen off and it seems to have an bare bark on our plant with 3 strong firm leaves on it (it only had 5 to start with)

Now the bottom leaves are turning yellow and falling off. Im picking those out so it doesn't rot the plant. Now my question is should I trim the steam..so the food can go to the roots for next year or should I leave the steams the way it is?

This is the type of orchid we have ..only the flowers where purple