Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2015

Accounts Receivable [Abstract]

Components of accounts receivable

	March 31, 2015			December 31, 2014
Accounts receivable	$	19,401,142		$	21,637,365
Less: allowance for doubtful accounts		(1,327,687	)		(1,321,328	)
	$	18,073,455		$	20,316,037