CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings, Appropriated [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2017	$ 5,638	$ 38,704,931	$ 6,241	$ 29,730,794		$ 68,447,604
Balance (in Shares) at Dec. 31, 2017	5,638,385
Exercise of options - employees	$ 7	31,494				31,501
Exercise of options - employees (in Shares)	6,546
Stock issued to employees	$ 7	73,869				73,876
Stock issued to employees (in Shares)	7,500
Stock issued for service	$ 61	486,538				486,599
Stock issued for service (in Shares)	60,899
Stock options vested to board of directors and employees		567,171				567,171
Net income				5,299,625		5,299,625
Balance at Dec. 31, 2018	$ 5,713	39,864,003	6,241	35,030,419		$ 74,906,376
Balance (in Shares) at Dec. 31, 2018	5,713,330					5,713,330
Exercise of options - employees (in Shares)						0
Stock issued to employees	$ 5	17,320				$ 17,325
Stock issued to employees (in Shares)	4,500
Stock issued for service	$ 23	99,977				100,000
Stock issued for service (in Shares)	23,774
Stock options vested to board of directors and employees		239,762				239,762
Common stock repurchased					$ (616,193)	(616,193)
Net income				(8,600,724)		(8,600,724)
Balance at Dec. 31, 2019	$ 5,741	$ 40,221,062	$ 6,241	$ 26,429,695	$ (616,193)	$ 66,046,546
Balance (in Shares) at Dec. 31, 2019	5,741,604					5,741,604