Tether and Media Queries

What would be the ideal way to switch the placement of a Tether based on viewport size? For instance, I normally have my Tether attached to the right of a target. At smaller viewport sizes, Tether tries to switch to the other side of the target which doesn't actually work and places it outside of the viewport. It doesn't seem to be smart enough to try switching to the top or bottom of the target even if there is plenty of room available there, and I can't seem to find a way to to configure it to explicitly make this switch.

Any suggestions?