Summary of Significant Accounting Policies (Details 1) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Summary of Significant Accounting Policies
Basic EPS, income	$ 2,141	$ (266)	$ 5,825	$ 2,499
Effect of dilutive securities convertible preferred stock, income	65	0	197	0
Net income	$ 2,206	$ (266)	$ 6,022	$ 2,499
Basic EPS, shares	3,197,718	3,175,192	3,198,691	3,191,719
Effect of dilutive securities convertible preferred stock, shares	206,660		222,599
Diluted EPS, shares	3,404,378	3,175,192	3,421,290	3,191,719
Basic EPS, per shares	$ 0.67	$ (0.08)	$ 1.82	$ 0.78
Effect of dilutive securities convertible preferred stock, per shares	(0.02)	0	(0.06)	0
Diluted EPS, per shares	$ 0.65	$ (0.08)	$ 1.76	$ 0.78