XML 19 R22.htm IDEA: XBRL DOCUMENT v3.3.0.814
Geographic Information (Details) - USD ($)
3 Months Ended
Aug. 31, 2015
May. 31, 2015
Geographic Information (Details) [Line Items]    
Property, Plant and Equipment, Net $ 410,915 $ 445,386
MEXICO    
Geographic Information (Details) [Line Items]    
Inventory, Gross 649,000 530,000
Property, Plant and Equipment, Net $ 34,000 $ 35,000
Geographic Concentration Risk [Member]    
Geographic Information (Details) [Line Items]    
Concentration Risk, Percentage 10.00%