Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2013

Accounts Receivable and Restricted Net Assets [Abstract]

Components of accounts receivable

	March 31, 2013			December 31, 2012
Accounts receivable	$	12,076,311		$	12,670,680
Less: allowance for doubtful accounts		(2,606,294	)		(2,592,057	)
	$	9,470,017		$	10,078,623