Other Real Estate Owned - Summary of Other Real Estate Owned Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Real Estate Roll Forward
Beginning balance	$ 216,254	$ 575,000
Transfer of loans to other real estate	0	0	$ 91,975
Direct write-downs	0	0
Sales of other real estate owned	(216,000)	(359,000)
End of year	$ 0	$ 216,254	$ 575,000