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Accounts Receivable (Details Textual) (USD $)	3 Months Ended
Accounts Receivable (Details Textual) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Accounts Receivable (Textual)
Decrease in allowance for doubtful accounts		$ (46,670)

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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