Welcome to Orchid Board
Well I'm afraid your orchid does not appear the healthiest. Also the one flower may be the only one (for now), as it looks like the others from the spike have already been and gone.
If the roots are in good condition then you should be able to get this guy to bloom again in the future, the roots are really the key here.
I notice it is in moss. Moss can be difficult, although some people love to use it. The main difficulty with moss is overwatering and rotting the roots.
I would strongly suggest that you need to gently remove it from the pot and take a look at the roots. If they are firm then that is great. On the other had if they are soft/mushy/hollow then they are dead. If most of them are good, then no problem, but if most of them are dead then you are going to have problems before you even start.
I agree with Natasha that the leaves look somewhat dehydrated, that could be a sign of existing root problems, but may just be down to underwatering, again the best way to know is to take a look at the roots.
If the moss seems fairly fresh (does not smell stale or seem very broken down) then you can put it back in with that again, if it smells stale I would not advise putting it back in.
Probably best to come back for more advice once you find out the state of the roots/moss because I could go on and on, making various assumptions which are not right, so probably best to find the status first and we can try and give more advice from there.