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Significant Customers and Foreign Sales (Tables)
12 Months Ended
Feb. 28, 2013
Segment Reporting [Abstract]  
Export sales to customers located outside the United States
   February 28,   February 29, 
   2013   2012 
Western Europe  $1,261,000   $2,832,000 
Far East   3,399,000    4,053,000 
Other   497,000    500,000 
   $5,157,000   $7,385,000