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6. Valuation Accounts (Tables)
12 Months Ended
Dec. 31, 2012
Receivables [Abstract]  
Valuation and allowance accounts
    Balance Beginning of Year     Net Charged to Costs and Expenses     Transfers     Net Write-Off     Balance End of Year  
2012                              
Allowance for doubtful accounts   $ 103,042     $ -     $ -     $ (52,680 )   $ 50,362  
Reserve for processing losses     131,544       83,016       -       -       214,560  
                                         
2011                                        
Allowance for doubtful accounts   $ 51,442     $ -     $ 75,000     $ (23,400 )   $ 103,042  
Reserve for processing losses     205,400       1,144       (75,000 )     -       131,544