Fair Market Value Measurements (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Financial assets
Investment securities available for sale	$ 51,918,745	$ 24,491,677
Carrying value
Financial assets
Cash and cash equivalents	8,407,000	17,181,000
Investment securities available for sale	24,648,000	40,760,000
Fair value
Financial assets
Cash and cash equivalents	8,407,000	17,181,000
Investment securities available for sale	24,648,000	40,760,000
Fair value | Level 1
Financial assets
Cash and cash equivalents	8,407,000	17,181,000
Investment securities available for sale	$ 24,648,000	$ 40,760,000