Annual report pursuant to Section 13 and 15(d)

Significant Customers and Concentration of Credit Risk (Details Textual)

v3.20.1
Significant Customers and Concentration of Credit Risk (Details Textual) - Customer concentration risk [Member]
12 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 28, 2018
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 32.50% 32.70% 32.50%