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Trade Receivables
12 Months Ended
Dec. 31, 2011
Trade Receivables [Abstract]  
Trade Receivables
Note 2.    Trade Receivables.

Trade receivables are comprised of the following for the years ending December 31:

   
2011
  
2010
 
Trade Receivables
 $12,361,372  $11,952,655 
Less: Allowance for Doubtful Accounts
  (820,191)  (938,831)
Trade Receivables, Net
 $11,541,181  $11,013,824