What is the name is my little bitty orange tetra fish?

I bought two little orange tetras over a year ago when they insisted on staying in the bag with the neon tetras I was buying. I didn't catch their name and still don't know what they are. All I caught was that they were tetras. They're a little less than 1/2 an inch long with a forked tail and are a bright orange color. They're pretty calm little guys and prefer to hang out in the plants, though they periodically venture out and investigate the antics of the more playful tetras. I tossed them in my 57 gallon tank recently and am trying to figure out what they are before I start adding some other types of fish (and I would like to get them a few more friends of their own type). Any ideas?