3. Earnings Per Share (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Net income	$ 476,260	$ 402,549
Net income per share with assumed conversions	$ 525,010	$ 467,717
Weighted average number of common shares outstanding, basic	21,671,921	20,869,689
Weighted average number of common shares outstanding, diluted	25,584,889	26,389,740
Earnings per share, basic	$ 0.02	$ 0.02
Earnings per share, diluted	$ 0.02	$ 0.02
Options and Warrants
Effect of dilutive securities	$ 0	$ 0
Effect of dilutive securities	1,857	920,051
Convertible Notes
Effect of dilutive securities	$ 48,750	$ 65,168
Effect of dilutive securities	3,911,111	4,600,000

Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.

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