Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	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, 2018	16,382,543
Balance at Dec. 31, 2018	$ 16	$ 38,275	$ 2,607	$ (34,512)	$ 1,457	$ (49)	$ 7,794
Issuance of common stock for private placement (in shares)	3,216,860
Issuance of common stock for private placement	$ 4	4,783					4,787
Share-based compensation (in shares)	30,000
Share-based compensation		53					53
Net loss				(1,261)		(9)	(1,270)
Foreign currency translation adjustment					48	1	49
Balance (in shares) at Dec. 31, 2019	19,629,403
Balance at Dec. 31, 2019	$ 20	43,111	2,607	(35,773)	1,505	(57)	11,413
Issuance of common stock for private placement (in shares)	4,320,989
Issuance of common stock for private placement	$ 4	4,195					4,199
Share-based compensation (in shares)	1,632,523
Share-based compensation	$ 2	1,921					1,923
Net loss				(5,216)		(5)	(5,221)
Foreign currency translation adjustment					(376)	(4)	(380)
Share-based compensation in exchange for services from nonemployees (in shares)	480,000
Share-based compensation in exchange for services from nonemployees		545					545
Reclassification due to disposal of a VIE’s subsidiary during the year			(9)	9
Balance (in shares) at Dec. 31, 2020	26,062,915
Balance at Dec. 31, 2020	$ 26	$ 49,772	$ 2,598	$ (40,980)	$ 1,129	$ (66)	$ 12,479