Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Summary of other expenses due to related parties
Total	$ 74	$ 59	$ 206	$ 195
Chuzhou Huarui [Member]
Summary of other expenses due to related parties
Total	52	48	140	157
Kunshan Enjin [Member]
Summary of other expenses due to related parties
Total	$ 22	$ 11	$ 66	$ 38