Shelly
As you said it is small tho your photo is very clear, I would need other angles to see the head, antenna, and side view of the body to better ID.
My guess is one of the beetles in the family Anobiidae, which are the death-watch beetles.
This is a varied group with many tiny brown beetles that might be yours. They are found thru out North America.
The larvae of this family are mostly wood-borers. Tho some adults and larvae in this family feed on dry plant matter, or stored products, or furniture or museum type specimens. Yours is probably one that feeds on stored products like grain, cereals, or other food type products and that is why it was in the bathroom.
Here is a site with many pics of various beetles in that family.
http://bugguide.net/node/view/9391/bgpage?from=0
