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Accrued Expenses (Tables)
12 Months Ended
Feb. 28, 2013
Payables and Accruals [Abstract]  
Accrued expenses
   February 28,   February 29, 
   2013   2012 
Accrued compensation  $121,275   $198,056 
Estimated warranty costs   27,750    36,000 
Accrued commissions   232,920    181,682 
Professional fees   33,000    30,172 
Other accrued expenses   62,082    83,822 
   $477,027   $529,732