Trade Accounts and Bills Receivable, Net (Details 1) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Trade Accounts and Bills Receivable, net [Abstract]
Balance at beginning of year	$ 3,657,173	$ 3,700,922
Provision for the period	241,549	11,199
Reversal - recoveries by cash	(170,387)	(97,852)
Charged to consolidated statements of operations and comprehensive (loss) income	71,162	(86,653)
Foreign exchange adjustment	91,389	134,903
Balance at end of period	$ 3,819,724	$ 3,749,172