Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Summary of Pre-tax income in jurisdictions
Pre-tax income	$ 5,781	$ 16,382
PRC [Member]
Summary of Pre-tax income in jurisdictions
Pre-tax income	6,032	16,384
BVI [Member]
Summary of Pre-tax income in jurisdictions
Pre-tax income	(239)	18
Others [Member]
Summary of Pre-tax income in jurisdictions
Pre-tax income	$ (12)	$ (20)

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Period Type:	duration