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Accounts Receivable (Details Textual) (USD $)	12 Months Ended
Accounts Receivable (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Accounts Receivable (Textual)
(Decrease) increase in allowance for doubtful accounts	$ (46,672)	$ 720,302

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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