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(6) Inventories (Tables)
6 Months Ended
Jun. 30, 2013
Notes to Financial Statements  
Schedule Of Inventory
       
    
    June 30,    December 31, 
    2013    2012 
           
   Component materials  $15,365   $18,989 
   Finished systems   888,833    623,830 
   $904,198   $642,819