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PROPERTY, PLANT AND EQUIPMENT (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2015
Apr. 30, 2014
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 39,378us-gaap_PropertyPlantAndEquipmentGross $ 39,559us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation (23,585)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (22,337)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, plant and equipment, net 15,793us-gaap_PropertyPlantAndEquipmentNet 17,222us-gaap_PropertyPlantAndEquipmentNet
Land, Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 19,820us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandBuildingsAndImprovementsMember		 20,191us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandBuildingsAndImprovementsMember
Furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 19,558us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember		 $ 19,368us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember