If there are ridges running down the back, I'll guess it's an insect closely related to the cigarette beetle: Stegobium paniceum, commonly referred to as the drugstore beetle. As this ordinary name implies, they can survive on a remarkably wide variety of foods, including stuff that wouldn't be consumed by other insects or might actually be toxic. Although they can't harm people directly, they are, like many Ptinids, quite resilient, found worldwide, and thus classed as pests. I wouldn't worry about their presence unless you are finding them in really large numbers. If you are interested in insects, they might even be fun to culture so as to observe their full lifecycle and style of living.
Please keep in mind that I'm still only making an educated guess here. There are seasoned taxonomists on this forum who could definitively key out the beetle if at least one extremely clear, detailed close-up was available. Hope this helps a bit anyway...