I don't know if I have the level of specifics that you're interested in, given the number of internally displaced Yazidis, but the vast majority of them have found refuge within the territory held by the Kurdistan Regional Government, which has made some significant efforts to deal with both Yazidi and other IDPs, including non-Kurdish ones that have been created as a result of the previous conflict and as result of the current fight around Mosul.
On November 22nd, 2016. See this statement in context.