Condensed Consolidated Statements of Changes in Stockholders’ Equity - USD ($)	Total	Common Stock	Additional Paid-in-Capital	Retained Earnings	Accumulated Other Comprehensive Gain (Loss)	Equity Attributable to Stockholders of the Company	Non-Controlling Interest
Beginning stock outstanding balance (in shares) at Dec. 31, 2018		27,612,597
Beginning balance at Dec. 31, 2018	$ 20,612,945	$ 27,613	$ 11,348,163	$ 10,617,253	$ (1,190,055)	$ 20,802,974	$ (190,029)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,376,598			9,367,287		9,367,287	9,311
Foreign currency translation	69,029				76,815	76,815	(7,786)
Ending stock outstanding balance (in shares) at Sep. 30, 2019		27,612,597
Ending balance at Sep. 30, 2019	30,058,572	$ 27,613	11,348,163	19,984,540	(1,113,240)	30,247,076	(188,504)
Beginning stock outstanding balance (in shares) at Jun. 30, 2019		27,612,597
Beginning balance at Jun. 30, 2019	25,692,822	$ 27,613	11,348,163	15,481,857	(976,292)	25,881,341	(188,519)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,509,285			4,502,683		4,502,683	6,602
Foreign currency translation	(143,535)				(136,948)	(136,948)	(6,587)
Ending stock outstanding balance (in shares) at Sep. 30, 2019		27,612,597
Ending balance at Sep. 30, 2019	30,058,572	$ 27,613	11,348,163	19,984,540	(1,113,240)	30,247,076	(188,504)
Beginning stock outstanding balance (in shares) at Dec. 31, 2019		27,612,597
Beginning balance at Dec. 31, 2019	34,893,210	$ 27,613	11,348,163	24,594,878	(908,764)	35,061,890	(168,680)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,193,292			12,193,292		12,193,292
Foreign currency translation	102,965				107,498	107,498	(4,533)
Purchase of minority interest	(762,479)		(935,692)			(935,692)	173,213
Ending stock outstanding balance (in shares) at Sep. 30, 2020		27,612,597
Ending balance at Sep. 30, 2020	46,426,988	$ 27,613	10,412,471	36,788,170	(801,266)	46,426,988	0
Beginning stock outstanding balance (in shares) at Jun. 30, 2020		27,612,597
Beginning balance at Jun. 30, 2020	39,399,442	$ 27,613	10,412,471	30,179,922	(1,220,564)	39,399,442	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,608,248			6,608,248		6,608,248
Foreign currency translation	419,298				419,298	419,298	0
Ending stock outstanding balance (in shares) at Sep. 30, 2020		27,612,597
Ending balance at Sep. 30, 2020	$ 46,426,988	$ 27,613	$ 10,412,471	$ 36,788,170	$ (801,266)	$ 46,426,988	$ 0