Annual report pursuant to Section 13 and 15(d)

Significant Customers and Concentration of Credit Risk (Details Textual)

v2.4.1.9
Significant Customers and Concentration of Credit Risk (Details Textual) (Customer concentration risk [Member])
12 Months Ended
Feb. 28, 2015
Feb. 28, 2014
Feb. 28, 2013
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 33.70%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
36.60%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
57.80%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember