Accounts Receivable (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Components of accounts receivable, net
Account receivables	$ 2,510,320	$ 2,150,981
Less: Allowance for doubtful accounts	(234,728)	(233,282)
Accounts Receivable, Net, Current	$ 2,275,592	$ 1,917,699