Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Summary of other expenses due to related parties
Total	$ 73	$ 57	$ 145	$ 132
Chuzhou Huarui [Member]
Summary of other expenses due to related parties
Total	52	35	102	88
Kunshan Enjin [Member]
Summary of other expenses due to related parties
Total	$ 21	$ 22	$ 43	$ 44