Statements of Shareholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2018		35,568,775
Balance at Dec. 31, 2018		$ 355,689	$ 10,106,344	$ (8,094,366)	$ 2,367,667
Stock-based compensation			9,078		9,078
Net income				77,084	77,084
Exercise of stock options (in shares)		20,000
Exercise of stock options		$ 200	3,800		4,000
Balance (in shares) at Jun. 30, 2019		35,588,775
Balance at Jun. 30, 2019		$ 355,889	10,119,222	(8,017,282)	2,457,829
Balance (in shares) at Mar. 31, 2019		35,568,775
Balance at Mar. 31, 2019		$ 355,689	10,110,883	(8,013,561)	2,453,011
Stock-based compensation			4,539		4,539
Net income				(3,721)	(3,721)
Exercise of stock options (in shares)		20,000
Exercise of stock options		$ 200	3,800		4,000
Balance (in shares) at Jun. 30, 2019		35,588,775
Balance at Jun. 30, 2019		$ 355,889	10,119,222	(8,017,282)	2,457,829
Balance (in shares) at Dec. 31, 2019		35,588,775
Balance at Dec. 31, 2019		$ 355,889	10,129,020	(8,063,835)	2,421,074
Stock-based compensation			7,323		7,323
Net income				(62,255)	(62,255)
Balance (in shares) at Jun. 30, 2020		35,588,775
Balance at Jun. 30, 2020		$ 355,889	10,136,343	(8,126,090)	2,366,142
Balance (in shares) at Mar. 31, 2020		35,588,775
Balance at Mar. 31, 2020		$ 355,889	10,133,259	(8,280,120)	2,209,028
Stock-based compensation			3,084		3,084
Net income				154,030	154,030
Balance (in shares) at Jun. 30, 2020		35,588,775
Balance at Jun. 30, 2020		$ 355,889	$ 10,136,343	$ (8,126,090)	$ 2,366,142