Fair Value Measurements - Assets Measured on a Recurring and Nonrecurring Basis(Details) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Assets:
Securities available-for-sale	$ 58,541,000		$ 60,200,000
Unrealized Losses, Less than 12 Months	(24,000)		(57,000)
Other real estate owned	66,000		100,000
Fair value, assets measured on recurring basis, unobservable input reconciliation
Principal balance of impaired loans	49,000		537,000
Valuation allowance	25,000		198,000
Increase in the provision for loan losses	25,000	$ 233,000
Other real estate owned, net carrying value	66,000		100,000
Write-downs of other real estate owned	0	23,000
U. S. government agencies and government sponsored entities
Assets:
Securities available-for-sale	3,000,000		2,994,000
Agency mortgage-backed securities: residential
Assets:
Securities available-for-sale	28,783,000		29,657,000
Unrealized Losses, Less than 12 Months	(16,000)		(25,000)
State and municipal
Assets:
Securities available-for-sale	24,504,000		25,222,000
Unrealized Losses, Less than 12 Months	(2,000)		(19,000)
Trust preferred security
Assets:
Securities available-for-sale	1,260,000		1,340,000
Corporate bonds
Assets:
Securities available-for-sale	994,000		987,000
Unrealized Losses, Less than 12 Months	(6,000)		(13,000)
Level 2
Assets:
Securities available-for-sale	57,281,000		58,860,000
Level 3
Assets:
Securities available-for-sale	1,260,000		1,340,000
Recurring basis | Level 2
Assets:
Securities available-for-sale	57,281,000		58,860,000
Recurring basis | Level 2 | U. S. government agencies and government sponsored entities
Assets:
Securities available-for-sale	3,000,000		2,994,000
Recurring basis | Level 2 | Agency mortgage-backed securities: residential
Assets:
Securities available-for-sale	28,783,000		29,657,000
Recurring basis | Level 2 | State and municipal
Assets:
Securities available-for-sale	24,504,000		25,222,000
Recurring basis | Level 2 | Corporate bonds
Assets:
Securities available-for-sale	994,000		987,000
Recurring basis | Level 3
Assets:
Securities available-for-sale	1,260,000		1,340,000
Recurring basis | Level 3 | Trust preferred security
Assets:
Securities available-for-sale	1,260,000		$ 1,340,000
Fair value, assets measured on recurring basis, unobservable input reconciliation
Recurring Level 3 assets, beginning of period balance	1,340,000	1,480,000
Losses for the period included in other comprehensive income	(80,000)	(30,000)
Recurring Level 3 assets, end of period balance	$ 1,260,000	$ 1,450,000