Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2015

Accounts Receivable [Abstract]

Components of accounts receivable

	September 30,  2015			December 31,  2014
Accounts receivable	$	18,429,512		$	21,637,365
Less: allowance for doubtful accounts		(1,270,574	)		(1,321,328	)
	$	17,158,938		$	20,316,037