Detropia, the latest documentary from Jesus Camp and 12th & Delaware directors Heidi Ewing and Rachel Grady, premiered at Sundance earlier this year and is being self-distributed by the filmmakers through their company, Loki Films. (To do this, they raised $70,000 on Kickstarter.) The film, a poignant portrait of the decline of Detroit, will be released on September 7, and you can check out the newly launched trailer below.