The film already screened at Toronto Film Festival in September 2012 to generally positive critical reviews and was picked up by Lionsgate for stateside release on June 21, 2013. (awardscircuit.com)
I'm honestly shocked this still hasn't come stateside in at least some form. (gonintendo.com)
However, they haven't come stateside as of yet, and nothing indicated that they ever will. (jamiex66.com)