Bank Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of bank loans
Bank loans	$ 29,232	$ 44,841
Industrial and Commercial Bank of China [Member]
Schedule of bank loans
Bank loans	11,232	16,940
Nanjing Bank [Member]
Schedule of bank loans
Bank loans	9,360	13,951
China Everbright Bank [Member]
Schedule of bank loans
Bank loans	2,880	3,121
Bank of Communications [Member]
Schedule of bank loans
Bank loans	2,880	3,080
China Minsheng Banking [Member]
Schedule of bank loans
Bank loans	2,880	3,080
HSBC [Member]
Schedule of bank loans
Bank loans		3,129
Ping An Bank [Member]
Schedule of bank loans
Bank loans		$ 1,540