I'm going to suggest it is the larvae of a carpet beetle. Initially I thought possibly the Varied carpet beetle because of the lighter patches near the posterior end similar to this picture from the wiki page on this species:
Having said that the geographical range might not be correct so it could be a similar species so I've dug a bit deeper. There are some 120 species in North America, from this link I'd say that the Buffalo carpet beetle is a contender.
Carpet beetles are classified as a pest species:
"larvae feed on natural fibers and can damage carpets, furniture, clothing and insect collections"
Not all bad though, the larvae are also known as wooly bears, how nice.