Planetary observations: what to expect from the Powerseeker 50AZ? I bought the Powerseeker 50AZ, which has D=50mm; F=600mm F/12 which comes with 3 eyepieces: 20mm, 12.5mm and 4mm.

As far as I can tell it's not possible to colimate this telescope. As suggested here this is a very important part to see sharp images.

I have tried to observe jupiter and mars with it and jupiter I could see a dim small blurry image and mars a very tiny dot with absolutely no way of seeing details on any of those in what seemed the best focus I could get from them.
The only thing I can see details is the moon really. Also I have observed in what seemed very clear sky conditions.

So my question is:
How much can I expect to see from planets with this telescope? 
With this current setup should I be seeing jupiter and mars in more details? 

UPDATE:
Equipment link

https://www.amazon.com/Celestron-PowerSeeker-50-Refractor-Telescope/dp/B0000UMLYI/ref=sr_1_1?ie=UTF8&amp;qid=1515177254&amp;sr=8-1&amp;keywords=powerseeker%2B50az%2Btelescope&amp;th=1
Currently, Mars is very far from the Earth, so it appears to be very small. I doubt that any amateur telescope will show any details on Mars in this condition. Perhaps when it comes to opposition and is close to Earth, you might be able to see some faint markings with your scope.

Jupiter should show a sharp disk and nearly pinpoint moons with the 12.5 mm eyepiece (48 power). You should see two prominent bands on Jupiter.

The 4 mm eyepiece is probably poor quality, and since it provides 150 power, is too much power for a 50 mm scope. In ideal conditions, the general rule is 100 power for a 50 mm scope (2 times the scope size in mm). The clarity of the sky is not what makes a sharp image. There is a condition named "seeing" that indicates how sharp the viewing is. On some nights, the seeing is poor, so the images will be soft (not sharp) and perhaps shimmering, as if you are viewing the object through a stream of water. (Essentially, you are, except it is miles or kilometers of air!)