Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2012

Accounts Receivable and Restricted Net Assets [Abstract]

Components of accounts receivable

	December 31, 2012			December 31, 2011
Accounts receivable	$	12,670,680		$	9,706,566
Less: allowance for doubtful accounts		(2,592,057	)		(2,618,608	)
	$	10,078,623		$	7,087,958