1. Summary of Significant Accounting Policies (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Summary Of Significant Accounting Policies
Basic EPS, Income	$ 2,412	$ 2,447	$ 5,865	$ 6,911
Effect of Dilutive Securities Convertible Preferred Stock, Income	103	103	310	312
Diluted EPS, Income	$ 2,515	$ 2,550	$ 6,175	$ 7,223
Diluted EPS, Shares	3,229,341	3,270,969	3,245,032	3,271,863
Effect of Dilutive Securities Convertible Preferred Stock, Shares	358,309	361,638	359,161	362,993
Diluted EPS, Shares	3,587,650	3,632,607	3,604,193	3,634,856
Basic EPS, Per Shares	$ 0.75	$ 0.75	$ 1.81	$ 2.11
Effect of Dilutive Securities Convertible Preferred Stock, Per Shares	(0.05)	(0.05)	(0.10)	(0.12)
Diluted EPS, Per Shares	$ 0.7	$ 0.7	$ 1.71	$ 1.99