Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock	Additional paid-in capital	Accumulated Deficit	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2019	$ 729,901	$ 31,131,893	$ (2,638,285)	$ (188,336)	$ (43,895)	$ 28,991,278
Balance, Shares at Dec. 31, 2019	7,299,009			86,090
Net loss			(122,267)			(122,267)
Other comprehensive income, net of taxes					43,895	43,895
Stock-based compensation		77,404				77,404
Balance at Mar. 31, 2020	$ 729,901	31,209,297	(2,760,552)	$ (188,336)		28,990,310
Balance, Shares at Mar. 31, 2020	7,299,009			86,090
Balance at Dec. 31, 2020	$ 729,901	31,372,093	(3,660,402)	$ (175,392)		28,266,200
Balance, Shares at Dec. 31, 2020	7,299,009			80,173
Net loss			(441,303)			(441,303)
Exercise of stock options		7,305		$ 4,375		11,680
Exercise of stock options, Shares				(2,000)
Stock-based compensation		34,629				34,629
Balance at Mar. 31, 2021	$ 729,901	$ 31,414,027	$ (4,101,705)	$ (171,017)		$ 27,871,206
Balance, Shares at Mar. 31, 2021	7,299,009			78,173