Consolidated Statements of Cash Flows - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Operating activities:
Net income	$ 1,385,000	$ 1,206,000	$ 4,281,000	$ 3,959,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	32,000	149,000	231,000	389,000	$ 439,000
Depreciation			604,000	487,000
Net amortization of securities premiums			412,000	490,000
Net amortization of loan origination fees			43,000	48,000
Deferred net loan origination costs			(348,000)	(297,000)
Amortization of core deposit intangible asset	23,000	17,000	54,000	52,000
Amortization of investment in low income housing partnership	200,000	173,000	600,000	412,000
Net (amortization) accretion of purchase fair value adjustments			(58,000)	4,000
Net realized loss (gain) on sales and calls of available for sale securities			15,000	(510,000)
Change in value of equity securities	4,000		(42,000)		(197,000)
Net gain on sales and valuation of other real estate owned			(62,000)	(26,000)
Earnings on bank owned life insurance and annuities	(99,000)	(93,000)	(266,000)	(269,000)
Deferred income tax benefit			(113,000)	(34,000)
Equity loss (gain) in unconsolidated subsidiary, net of dividends of $75 and $49, respectively			194,000	(105,000)
Equity gain from acquisition of unconsolidated subsidiary			(415,000)
Stock-based compensation expense			60,000	54,000
Mortgage loans originated for sale				(3,527,000)
Proceeds from mortgage loans sold to others			71,000	3,563,000
Mortgage banking income			(53,000)	(170,000)
Increase in accrued interest receivable and other assets			(958,000)	(1,360,000)
(Decrease) increase in accrued interest payable and other liabilities			(928,000)	146,000
Net cash provided by operating activities			3,322,000	3,306,000
Investing activities:
Purchases of: Securities available for sale			(4,119,000)	(42,510,000)
Purchases of: Premises and equipment			(252,000)	(324,000)
Purchases of: Bank owned life insurance and annuities			(35,000)	(36,000)
Proceeds from: Sales of securities available for sale		10,166,000	4,285,000	21,800,000
Proceeds from: Maturities of and principal repayments on securities available for sale			10,137,000	12,407,000
Proceeds from: Redemption (purchase) of FHLB stock			1,058,000	(6,000)
Proceeds from: Sale of other real estate owned			296,000	617,000
Proceeds from: Sale of other assets			22,000	25,000
Net cash received from acquisition			7,561,000
Investment in low income housing partnerships			(100,000)	(1,919,000)
Net decrease in interest bearing time deposits with banks			490,000
Net increase in loans			(2,691,000)	(4,809,000)
Net cash provided by (used in) investing activities			16,652,000	(14,755,000)
Financing activities:
Net increase in deposits			16,071,000	17,756,000
Net (decrease) increase in short-term borrowings and securities sold under agreements to repurchase			(17,417,000)	511,000
Repayment of long-term debt			(10,000,000)
Cash dividends			(3,290,000)	(3,145,000)
Purchase of treasury stock			(40,000)	(86,000)
Treasury stock issued for employee stock plans			91,000
Common stock issued for employee stock plans			42,000	206,000
Net cash (used in) provided by financing activities			(14,543,000)	15,242,000
Net increase in cash and cash equivalents			5,431,000	3,793,000
Cash and cash equivalents at beginning of year			9,897,000	9,559,000	9,559,000
Cash and cash equivalents at end of period	$ 15,328,000	$ 13,352,000	15,328,000	13,352,000	$ 9,897,000
Supplemental information:
Interest paid			2,619,000	2,051,000
Income taxes paid			14,000	385,000
Supplemental schedule of noncash investing and financing activities:
Transfer of loans to other real estate owned			67,000	529,000
Transfer of loans to repossessed vehicles			12,000	$ 5,000
Assets acquired:
Investment in time deposits with banks			3,675,000
Loans			31,331,000
Premises and equipment			125,000
Accrued interest receivable			123,000
Core deposit and other intangible assets			289,000
Bank owned life insurance			632,000
FHLB stock			124,000
Other assets			267,000
Assets acquired, total			36,566,000
Liabilities assumed:
Deposits			36,052,000
Accrued interest payable and other liabilities			266,000
Liabilities assumed, total			$ 36,318,000