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Significant Customers and Concentration of Credit Risk (Details Textual) - Customer concentration risk [Member]
12 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 28, 2014
Concentration Risk [Line Items]      
Concentration risk, Additional Characteristic 10% or more of our net sales 10% or more of our net sales 10% or more of our net sales
Net sales [Member]      
Concentration Risk [Line Items]      
Concentration risk, Additional Characteristic five largest customers five largest customers five largest customers
Concentration risk, Percentage 31.70% 33.70% 36.60%