Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock [Member]	Deferred Compensation, Share-Based Payments [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 31, 2020	6,489,004					(33,840)
Balance at Dec. 31, 2020	$ 6,489	$ 2,005,500	$ 70,083,486	$ 570,761	$ (69,625,790)	$ (57,847)	$ 2,982,599
Foreign currency translation adjustments	0	0	0	19,306	0	0	19,306
Share-based compensation expense	$ 0	0	324,783	0	0	0	324,783
Issuance of common stock for accrued bonus and signing bonus (in shares)	1,300,000
Issuance of common stock for accrued bonus and signing bonus	$ 1,300	(2,005,500)	2,242,950	0	0	$ 0	238,750
Issuance of common stock for compensation (in shares)	18,099					0
Issuance of common stock for compensation	$ 18	0	39,982	0	0	$ 0	40,000
Net income (loss)	$ 0	0	0	0	(696,760)	$ 0	(696,760)
Balance (in shares) at Dec. 31, 2021	7,807,103					(33,840)
Balance at Dec. 31, 2021	$ 7,807	0	72,691,201	590,067	(70,322,550)	$ (57,847)	2,908,678
Foreign currency translation adjustments		0	0	(273,707)	0	$ 0	(273,707)
Issuance of common stock for accrued bonus and signing bonus (in shares)	13,021					0
Issuance of common stock for accrued bonus and signing bonus	$ 13	0	24,987	0	0	$ 0	25,000
Net income (loss)	0	0	0	0	652,146	0	652,146
Share-based compensation expense	$ 0	82,180	65,308	0	0	$ 0	147,488
Repurchase of common stock for treasury (in shares)	0					(109,797)
Repurchase of common stock for treasury	$ 0	0	0	0	0	$ (106,993)	$ (106,993)
Exercised, number of shares (in shares)	20,000					0	20,000
Option exercise	$ 20	0	19,480	0	0	$ 0	$ 19,500
Balance (in shares) at Dec. 31, 2022	7,840,124					(143,637)
Balance at Dec. 31, 2022	$ 7,840	$ 82,180	$ 72,800,976	$ 316,360	$ (69,670,404)	$ (164,840)	$ 3,372,112