Unidentified Dinosaur (Saurornithoides?) Tooth

This is a small unidentified dinosaur tooth from the Hell Creek Formation of Montana. The label I had on it from the collector tentatively identified it as Saurornithoides? a small theropod dinosaur which would have been about 2-3 meters in length. Either way it's a beautifully preserved dinosaur tooth with great enamel, nice serrations and a sharp tip.