It's supposed to be up until December 30. There is an article in the Detroit Free Press here, and here a longer description from the MOCAD website:
Vision in a Cornfield is a large-scale collaboration that unites distinct creative communities in Detroit: the psyche/art rock band Destroy All Monsters, the urban arts group Ogun and the electromechanical art collective Apetechnology. The inspiration for the exhibition is two-fold. It is based on an unexpected encounter shared by Destroy All Monsters' Mike Kelley and Cary Loren, which took place in a cornfield in Fowlerville, Michigan. It is also a reunion and reimagining of an unsanctioned art project in the streets of Detroit by Ogun, named after the Yoruba orisha of iron, hunting, politics and war.
In conjunction with the exhibition, MOCAD presents the premiere issue of BOX #1, an homage to a short-lived quarterly by the same name produced in the late 1970s. BOX is published in a limited edition of 150, each of which hold at least 30 works by local and national artists, musicians and writers whose work has a relationship to the themes present in the exhibition. BOX includes, among other items, a second edition of Faruq Z. Bey’s seminal text of music theory and existentialism, entitled Toward a ‘Ratio’nal Aesthetic.