Detachable wall-mounted shelf

A shelf with a platform and a pair of brackets, whereby the platform has an upper panel and a lower panel at right angles. The upper panel has coaxial trunnions that fit into groove in the brackets. The groove has a vertical back wall, a shaped front wall, an opening in the top of the bracket, an upper pocket in the front wall, and a lower trough where the front and back walls meet at the bottom of the groove. The pocket and trough are connected by a 45° slope. The platform has a down position maintained by gravity where the upper panel is horizontal. The trunnion resides in the groove pocket and the lower panel abuts a vertical retaining wall that is parallel to the vertical back wall of groove. The platform has an up position maintained by gravity where the lower panel is horizontal. The trunnion resides in the trough and the upper panel abuts the retaining wall.