12. SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended
Aug. 31, 2018	Aug. 31, 2017
Net sales	$ 4,740	$ 6,970
Property and equipment, net	1,174	1,140
US
Net sales	2,695	1,290
Property and equipment, net	1,130	1,089
Asia
Net sales	1,734	5,660
Property and equipment, net	39	39
Europe
Net sales	311	20
Property and equipment, net	$ 5	$ 12

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Subparagraph (SX 210.5-02(14))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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