Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Private Placement [Member] Common Stock [Member]	Private Placement [Member] Additional Paid-in Capital [Member]	Private Placement [Member] Statutory Reserves [Member]	Private Placement [Member] Retained Earnings [Member]	Private Placement [Member] AOCI Attributable to Parent [Member]	Private Placement [Member] Noncontrolling Interest [Member]	Private Placement [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Statutory Reserves [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2017								13,982,542
Balance at Dec. 31, 2017								$ 14	$ 31,554	$ 2,607	$ (20,487)	$ 1,598	$ 177	$ 15,463
Share-based compensation									75					75
Net (loss)/income											(565)		(5)	(570)
Foreign currency translation gain/(loss)												466	8	474
Issuance of common stock for private placement, net of $1.89 million proceeds allocated to investor warrants labilities and $1.20 million direct offering costs (including $0.39 million proceeds allocated to placement agent warrants liabilities), respectively (in shares)	2,150,001
Issuance of common stock for private placement, net of $1.89 million proceeds allocated to investor warrants labilities and $1.20 million direct offering costs (including $0.39 million proceeds allocated to placement agent warrants liabilities), respectively	$ 2	$ 7,986					$ 7,988
Balance (in shares) at Mar. 31, 2018								16,132,543
Balance at Mar. 31, 2018								$ 16	39,615	2,607	(21,052)	2,064	180	23,430
Balance (in shares) at Dec. 31, 2017								13,982,542
Balance at Dec. 31, 2017								$ 14	31,554	2,607	(20,487)	1,598	177	15,463
Net (loss)/income														(10,124)
Foreign currency translation gain/(loss)														194
Balance (in shares) at Jun. 30, 2018								16,132,543
Balance at Jun. 30, 2018								$ 16	37,853	2,607	(30,556)	1,786	(2)	11,704
Balance (in shares) at Mar. 31, 2018								16,132,543
Balance at Mar. 31, 2018								$ 16	39,615	2,607	(21,052)	2,064	180	23,430
Share-based compensation									76					76
Net (loss)/income											(9,504)		(50)	(9,554)
Foreign currency translation gain/(loss)												(278)	(2)	(280)
Purchase noncontrolling interest in a Variable Interest Entity									(1,838)				(130)	(1,968)
Balance (in shares) at Jun. 30, 2018								16,132,543
Balance at Jun. 30, 2018								$ 16	37,853	2,607	(30,556)	1,786	(2)	11,704
Balance (in shares) at Dec. 31, 2018								16,382,543
Balance at Dec. 31, 2018								$ 16	38,275	2,607	(34,512)	1,457	(49)	7,794
Share-based compensation (in shares)								30,000
Share-based compensation									13					13
Net (loss)/income											(1,138)		(2)	(1,140)
Foreign currency translation gain/(loss)												(35)	(1)	(36)
Balance (in shares) at Mar. 31, 2019								16,412,543
Balance at Mar. 31, 2019								$ 16	38,288	2,607	(35,650)	1,422	(52)	6,631
Balance (in shares) at Dec. 31, 2018								16,382,543
Balance at Dec. 31, 2018								$ 16	38,275	2,607	(34,512)	1,457	(49)	7,794
Net (loss)/income														(1,522)
Foreign currency translation gain/(loss)														24
Balance (in shares) at Jun. 30, 2019								16,412,543
Balance at Jun. 30, 2019								$ 16	38,301	2,607	(36,029)	1,481	(54)	6,322
Balance (in shares) at Mar. 31, 2019								16,412,543
Balance at Mar. 31, 2019								$ 16	38,288	2,607	(35,650)	1,422	(52)	6,631
Share-based compensation									13					13
Net (loss)/income											(379)		(3)	(382)
Foreign currency translation gain/(loss)												59	1	60
Balance (in shares) at Jun. 30, 2019								16,412,543
Balance at Jun. 30, 2019								$ 16	$ 38,301	$ 2,607	$ (36,029)	$ 1,481	$ (54)	$ 6,322