Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Share-based Payment Arrangement, Employee [Member] Common Stock [Member]	Share-based Payment Arrangement, Employee [Member] Additional Paid-in Capital [Member]	Share-based Payment Arrangement, Employee [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, 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, net				$ 4	4,195					4,199
Share-based compensation in exchange for services from nonemployees (in shares)				480,000
Share-based compensation in exchange for services from nonemployees					545					545
Share-based compensation in exchange for services from employees and directors (in shares)	1,632,523
Share-based compensation in exchange for services from employees and directors	$ 2	$ 1,921	$ 1,923
Reclassification due to disposal of a VIE’s subsidiary during the year						(9)	9
Net loss							(5,216)		(5)	(5,221)
Foreign currency translation adjustment								(376)	(4)	(380)
Net (loss)/income							(5,216)		(5)	(5,221)
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
Issuance of common stock for private placement (in shares)				5,212,000
Issuance of common stock for private placement, net				$ 5	5,185					5,190
Share-based compensation in exchange for services from employees and directors (in shares)				4,015,735
Share-based compensation in exchange for services from employees and directors				$ 4	6,746					6,750
Net loss							(2,754)		66	(2,688)
Foreign currency translation adjustment								(47)		(47)
Cashless exercise of warrants (in shares)				42,027
Cashless exercise of warrants					82					82
Net (loss)/income							(2,754)		$ 66	(2,688)
Balance (in shares) at Dec. 31, 2021				35,332,677
Balance at Dec. 31, 2021				$ 35	$ 61,785	$ 2,598	$ (43,734)	$ 1,082		$ 21,766