Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2019		$ 775	$ 13,894,680		$ (3,714,255)	$ 10,181,200
Beginning balance, shares at Dec. 31, 2019		7,745,030
Stock options exercised		$ 2	13,213			13,215
Stock options exercised, shares		15,000
Stock options repurchased			(5,846)			(5,846)
Stock issued for cash in offering, net
Net loss					(990,670)	(990,670)
Ending balance, value at Jun. 30, 2020		$ 777	13,902,047		(4,704,925)	9,197,899
Ending balance, shares at Jun. 30, 2020		7,760,030
Beginning balance, value at Mar. 31, 2020		$ 776	13,898,201		(4,103,665)	9,795,312
Beginning balance, shares at Mar. 31, 2020		7,752,530
Stock options exercised		$ 1	6,914			6,915
Stock options exercised, shares		7,500
Stock options repurchased			(3,068)			(3,068)
Net loss					(601,260)	(601,260)
Ending balance, value at Jun. 30, 2020		$ 777	13,902,047		(4,704,925)	9,197,899
Ending balance, shares at Jun. 30, 2020		7,760,030
Beginning balance, value at Dec. 31, 2020		$ 778	13,893,660		(2,235,852)	11,658,586
Beginning balance, shares at Dec. 31, 2020		7,775,030
Stock options exercised			6,070			6,070
Stock options exercised, shares		5,000
Stock issued for cash in offering, net		$ 300	16,794,700			16,795,000
Stock issued for cash in offering, net, shares		3,000,000
Net loss					1,184,522	1,184,522
Ending balance, value at Jun. 30, 2021		$ 1,078	30,694,430		(1,051,330)	29,644,178
Ending balance, shares at Jun. 30, 2021		10,780,030
Beginning balance, value at Mar. 31, 2021		$ 778	13,897,280		(1,580,689)	12,317,369
Beginning balance, shares at Mar. 31, 2021		7,777,530
Stock options exercised			2,450			2,450
Stock options exercised, shares		2,500
Stock issued for cash in offering, net		$ 300	16,794,700			16,795,000
Stock issued for cash in offering, net, shares		3,000,000
Net loss					529,359	529,359
Ending balance, value at Jun. 30, 2021		$ 1,078	$ 30,694,430		$ (1,051,330)	$ 29,644,178
Ending balance, shares at Jun. 30, 2021		10,780,030