4. PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	May. 31, 2015	May. 31, 2014	May. 31, 2013
Property And Equipment Net Details
Leasehold improvements	$ 1,093	$ 1,093
Furniture and fixtures	1,062	1,094
Machinery and equipment	3,802	3,801
Test equipment	2,967	3,041
Property and equipment, gross	8,924	9,029
Less: Accumulated depreciation and amortization	(8,446)	(8,555)
Property and equipment, net	$ 478	$ 474	$ 301

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

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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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.

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