Maren Washington is the controller for Moab Company. Moab owns a building that is no longer used in Moab's production process. Moab is able to use the building as a storage facility. Because it is no longer used in Maren's production process, Maren suspects that the building has declined in value substantially and permanently. However, the building is still reported in Moab's balance sheet at its depreciated book value based on the original purchase cost. According to the concept of accounting CONSERVATISM, what accounting action should Maren take with respect to this building?