Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)	Common Stock	Accumulated Deficit	Total
Beginning balance, shares at Dec. 31, 2018	21,583,032
Beginning balance, amount at Dec. 31, 2018	$ 24,739,482	$ (16,594,146)	$ 8,145,336
Adjustment for the adoption of ASU 2016-02 accounting for leases		(52,315)	(52,315)
Net income		917,396	917,396
Amortization of value of employee stock options	$ 8,087		8,087
Cashless exercise of warrants, shares	232,381
Conversion of convertible note to common stock, shares	100,000
Conversion of convertible note to common stock, amount	$ 50,000		50,000
Ending balance, shares at Jun. 30, 2019	21,915,413
Ending balance, amount at Jun. 30, 2019	$ 24,797,569	(15,729,065)	9,068,504
Beginning balance, shares at Mar. 31, 2019	21,683,032
Beginning balance, amount at Mar. 31, 2019	$ 24,789,482	(16,170,201)	8,619,281
Net income		441,136	441,136
Amortization of value of employee stock options	$ 8,087		8,087
Cashless exercise of warrants, shares	232,281
Ending balance, shares at Jun. 30, 2019	21,915,413
Ending balance, amount at Jun. 30, 2019	$ 24,797,569	(15,729,065)	9,068,504
Beginning balance, shares at Dec. 31, 2019	22,215,512
Beginning balance, amount at Dec. 31, 2019	$ 24,858,311	(17,024,523)	7,833,788
Net income		440,700	440,700
Unamortized loan origination cost attributable to the 500,000 notes converted to 1,000,000 shares	(116,400)		(116,400)
Amortization of value of employee stock options	$ 10,624		10,624
Ending balance, shares at Jun. 30, 2020	22,215,512
Ending balance, amount at Jun. 30, 2020	$ 24,752,535	(15,583,823)	8,168,712
Beginning balance, shares at Mar. 31, 2020	22,215,512
Beginning balance, amount at Mar. 31, 2020	$ 24,747,223	(17,279,563)	7,467,660
Net income		695,740	695,740
Amortization of value of employee stock options	$ 5,312		5,312
Ending balance, shares at Jun. 30, 2020	22,215,512
Ending balance, amount at Jun. 30, 2020	$ 24,752,535	$ (15,583,823)	$ 8,168,712