CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings Unappropriated	Retained Earnings Appropriated	Accumulated Other Comprehensive Income (Loss)	Total
Shares issued at Dec. 31, 2018	9,411,401
Balance, shares at Dec. 31, 2018	9,361,571	49,830
Balance, amount at Dec. 31, 2018	$ 23,525	$ (554,870)	$ 95,020,808	$ 185,608,445	$ 24,233,544	$ (10,478,048)	$ 293,853,404
Translation adjustment						(5,013,759)	(5,013,759)
Shares issued from treasury stock for services, shares	4,000	(4,000)
Shares issued from treasury stock for services, amount		$ 44,541	(22,941)				21,600
Cashless exercise of stock options, shares issued	151,856
Cashless exercise of stock options, shares outstanding	151,856
Cashless exercise of stock options, amount	$ 379		(379)				0
Issuance of stock options to employees and directors			45,900				45,900
Net loss				(25,800,045)			(25,800,045)
Shares issued at Dec. 31, 2019	9,563,257
Balance, shares at Dec. 31, 2019	9,517,427	45,830
Balance, amount at Dec. 31, 2019	$ 23,904	$ (510,329)	95,043,388	159,808,400	24,233,544	(15,491,807)	263,107,100
Translation adjustment						19,945,054	19,945,054
Restricted shares issued for services, shares	480,050
Restricted shares issued for services, amount	$ 480,050	235	2,391,928				2,392,163
Net loss				(8,420,044)			(8,420,044)
Shares issued at Dec. 31, 2020	10,043,307
Balance, shares at Dec. 31, 2020	9,997,477	45,830
Balance, amount at Dec. 31, 2020	$ 24,139	$ (510,329)	$ 97,435,316	$ 151,388,356	$ 24,233,544	$ 4,453,247	$ 277,024,273