3. Earnings (Loss) per Share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income (loss)	$ (255,041)	$ 476,260
Net income per share with assumed conversions	$ (207,541)	$ 525,010
Weighted average number of common shares outstanding, basic	22,215,512	21,671,921
Weighted average number of common shares outstanding, diluted	22,853,349	25,584,889
Earnings (loss) per share, basic	$ (.01)	$ 0.02
Earnings (loss) per share, diluted	$ (0.01)	$ 0.02
Options and Warrants
Effect of dilutive securities	$ 0	$ 0
Effect of dilutive securities	0	1,857
Convertible Notes
Effect of dilutive securities	$ 47,500	$ 48,750
Effect of dilutive securities	1,250,000	3,911,111