Income Taxes (Schedule of differences between the provision for income taxes and statutory federal income tax rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
Provision at statutory rate	$ 1,570	$ 1,573
Tax exempt income	(79)	(84)
State income taxes, net of federal income tax benefit	12	12
Other, net	56	28
Effective income tax	$ 1,559	$ 1,529
Provision at statutory rate, Percent	21.00%	21.00%
Tax exempt income, percent	(1.00%)	(1.00%)
State income taxes, net of federal income tax benefit, percent	0.00%	0.00%
Other, net, percent	1.00%	0.00%
Effective income tax and rate, percent	21.00%	20.00%