The image is pretty small, but from here it looks like the spotted cucumber beetle. If it is, it's just passing through and I doubt is any threat to your orchids. If it isn't a cucumber beetle, it doesn't look like anything orchids should fear.
Somehow I did not see your post before submitting my own. Either way, I'm pretty sure your identification (cucumber beetle or something very similar) is what I found indoors this year. Particularly in light of the fact that I'm sure they came in on some of the vegetables I purchased. Thanks for the insight.