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Geographic Information (Details) - USD ($)
9 Months Ended
Feb. 29, 2016
May. 31, 2015
Geographic Information (Details) [Line Items]    
Property, Plant and Equipment, Net $ 398,154 $ 445,386
MEXICO    
Geographic Information (Details) [Line Items]    
Inventory, Gross 701,000 530,000
Property, Plant and Equipment, Net $ 28,000 $ 35,000
Geographic Concentration Risk [Member]    
Geographic Information (Details) [Line Items]    
Concentration Risk, Percentage 10.00%