Without a photo (and possibly without being able to look at it), it's impossible to tell. One person's "small gouge" is another's "massive divot".
I'd swing by a repair or tire shop if I had a concern. (Yes, they have some vested interest, perhaps, but in my experience, they'll put an eyeball on something for ya for free and you can judge from the conversation how to proceed. I've had good luck with the tire specialists for things like this, even the Walmart/Sam's Club tire shops. Roll around back to the working part of the shop and ask one of the techs.)
