Supplemental Financial Data - Schedule of Components of Operating Expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Notes to Financial Statements
Bank card interchange fees	$ 487,933	$ 466,455	$ 428,178
Other professional fees	230,920	232,159	189,252
Directors & board committee fees	336,458	349,597	274,881
FDIC insurance assessment	240,223	234,555	257,036
Administrative expense - employee benefit plans	$ 224,021	$ 207,299	$ 172,354