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Income Taxes (Tables)
12 Months Ended
Feb. 28, 2013
Income Tax Disclosure [Abstract]  
Income tax reconciliation
   February 28,
2013
   February 29,
2012
 
Expected federal income tax  $47,155   $486,150 
State tax, net of federal   6,736    34,725 
Permanent timing difference   19,409    28,319 
State tax credits   (76,137)   (251,196)
Utilization of net operating loss carryforwards and          
research and development tax credits   (71,569)   (502,350)
(Decrease) in valuation allowance   -    (86,167)
Income tax (benefit)  $(74,406)  $(290,519)
           
Current federal and state income taxes  $5,585   $46,844 
Recognition of deferred tax assets   (3,854)   (86,167)
State tax credits   (76,137)   (251,196)
Income tax (benefit)  $(74,406)  $(290,519)
Net deferred tax asset components
   February 28,   February 29, 
   2013   2012 
Inventory  $129,000   $126,000 
Allowance for accounts receivable   8,000    10,000 
Accrued expenses and other   111,000    91,000 
Research tax credits   100,000    110,000 
Deferred tax asset   348,000    337,000 
Deferred tax liability   (258,000)   (251,000)
Net deferred tax asset  $90,000   $86,000