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Significant Customers and Foreign Sales (Tables)
12 Months Ended
Feb. 29, 2016
Segment Reporting [Abstract]  
Export sales to customers located outside the United States
   February 29,   February 28, 
   2016   2015 
Western Europe  $2,789,000   $2,069,000 
Far East   2,981,000    2,147,000 
Other   807,000    802,000 
   $6,577,000   $5,018,000