Bank Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule of short term bank loans
Bank loans	$ 35,492	$ 29,497
Industrial and Commercial Bank Of China [Member]
Schedule of short term bank loans
Bank loans	18,382	14,540
Nanjing Bank [Member]
Schedule of short term bank loans
Bank loans	9,191	5,089
China Minsheng Bank [Member]
Schedule of short term bank loans
Bank loans	2,828	2,908
Bank of Communications [Member]
Schedule of short term bank loans
Bank loans	2,814	2,893
Shanghai Pudong Development Bank [Member]
Schedule of short term bank loans
Bank loans		2,613
China Everbright Bank [Member]
Schedule of short term bank loans
Bank loans		1,454
HSBC [Member]
Schedule of short term bank loans
Bank loans	$ 2,277