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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Apr. 30, 2018
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 33,892	$ 34,171
Less accumulated depreciation	(24,927)	(24,426)
Property, plant and equipment, net	8,965	9,745
Land, buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,956	15,932
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 17,936	$ 18,239

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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-SubTopic 10
-Section 50
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-Section S99
-Paragraph 1
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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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