Quarterly report pursuant to sections 13 or 15(d)

Allowance for Bad Debts (Detail)

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Allowance for Bad Debts (Detail) (USD $)
3 Months Ended
Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Allowance for doubtful accounts at January 1 $ 56,931
Additions   
Write-offs   
Allowance for doubtful accounts at March 31 $ 56,931