Income Taxes (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
U.S. statutory federal rate and effective tax rate
U.S. statutory rates	34.00%	34.00%
U.S. effective rate in excess of China tax rate	(3.30%)	(4.20%)
Bad debt allowance	(17.90%)	(8.80%)
China valuation allowance	(2.10%)
Effect of change in U.S statutory rate from 34% to 21%	(7.20%)	(11.60%)
U.S. valuation allowance	(3.50%)	(9.40%)
Total current provision for income taxes	0.00%	0.00%