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Significant Customers and Foreign Sales (Tables)
12 Months Ended
Feb. 28, 2015
Segment Reporting [Abstract]  
Export sales to customers located outside the United States
   February 28, 
   2015   2014 
Western Europe  $2,069,000   $1,817,000 
Far East   2,147,000    3,328,000 
Other   802,000    1,302,000 
   $5,018,000   $6,447,000