Loans and Allowance for Loan Losses - ALL Roll Forward (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 4,354,000	$ 3,880,000	$ 3,880,000
Loans charged off	(232,000)		(506,000)
Recoveries of loans charged off	225,000		57,000
Provision (reallocation) charged to operating expense	616,543	356,325	923,000
Ending balance	4,964,000		4,354,000
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,906,000	1,734,000	1,734,000
Loans charged off	0		(95,000)
Recoveries of loans charged off	41,000		0
Provision (reallocation) charged to operating expense	299,000		267,000
Ending balance	2,246,000		1,906,000
Consumer Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,015,000	906,000	906,000
Loans charged off	(80,000)		(247,000)
Recoveries of loans charged off	64,000		0
Provision (reallocation) charged to operating expense	244,000		356,000
Ending balance	1,243,000		1,015,000
Construction and Land Development [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	627,000	690,000	690,000
Loans charged off	(14,000)		(50,000)
Recoveries of loans charged off	34,000		26,000
Provision (reallocation) charged to operating expense	214,000		(39,000)
Ending balance	861,000		627,000
Commercial and Industrial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	777,000	524,000	524,000
Loans charged off	(18,000)		0
Recoveries of loans charged off	43,000		19,000
Provision (reallocation) charged to operating expense	(226,000)		234,000
Ending balance	576,000		777,000
Consumer and Other [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	29,000	$ 26,000	26,000
Loans charged off	(120,000)		(114,000)
Recoveries of loans charged off	43,000		12,000
Provision (reallocation) charged to operating expense	86,000		105,000
Ending balance	$ 38,000		$ 29,000