Consolidated Statements of Cash Flows - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Operating activities:
Net income	$ 1,897,000	$ 1,606,000	$ 5,271,000	$ 4,249,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	(257,000)	87,000	(536,000)	639,000
Depreciation			548,000	609,000
Net amortization of securities premiums			972,000	973,000
Net amortization of loan origination fees			454,000	163,000
Deferred net loan origination costs			(474,000)	(496,000)
Amortization of intangibles	16,000	19,000	49,000	57,000
Amortization of investment in low income housing partnerships	200,000	200,000	600,000	600,000
Net amortization of purchase fair value adjustments			(123,000)	(80,000)
Net realized gain on sales and calls of available for sale securities			(58,000)	(845,000)
Change in value of equity securities	(38,000)	(2,000)	(139,000)	152,000
Net gain on other real estate owned	0	0	(49,000)	0
Earnings on bank owned life insurance and annuities	(64,000)	(74,000)	(186,000)	(201,000)
Deferred income tax (benefit) expense			(206,000)	242,000
Stock-based compensation expense	38,000	31,000	110,000	94,000
Proceeds from mortgage loans sold to others			56,000	57,000
Mortgage banking income			(26,000)	(41,000)
Increase in accrued interest receivable and other assets			(563,000)	(3,110,000)
Increase (decrease) in accrued interest payable and other liabilities			85,000	(21,000)
Net cash provided by operating activities			5,785,000	3,041,000
Investing activities:
Purchases of: Securities available for sale			(173,765,000)	(201,217,000)
Purchases of: FHLB stock			0	(7,000)
Purchases of: Premises and equipment			(164,000)	(247,000)
Purchases of: Bank owned life insurance and annuities			(36,000)	(36,000)
Redemption of equity securities			119,000	0
Sales of debt securities available for sale			32,856,000	48,565,000
Proceeds from: Maturities of and principal repayments on securities available for sale			61,315,000	70,748,000
Proceeds from: Redemption of FHLB stock			907,000	0
Proceeds from: Sale of other assets			1,000	0
Net decrease in interest bearing time deposits with banks			0	1,475,000
Net decrease (increase) in loans			11,150,000	(19,453,000)
Net cash used in investing activities			(67,617,000)	(100,172,000)
Financing activities:
Net increase in deposits			84,712,000	68,586,000
Net (decrease) increase in short-term borrowings and securities sold under agreements to repurchase			(19,946,000)	11,446,000
Issuance of FRB advances			0	31,298,000
Repayment of FRB advances			(27,955,000)	0
Repayment of long-term debt			0	(10,000,000)
Cash dividends			(3,304,000)	(3,358,000)
Purchase of treasury stock			(675,000)	(1,372,000)
Treasury stock issued for employee stock plans			77,000	70,000
Net cash provided by financing activities			32,909,000	96,670,000
Net decrease in cash and cash equivalents			(28,923,000)	(461,000)
Cash and cash equivalents at beginning of year			41,621,000	12,740,000	$ 12,740,000
Cash and cash equivalents at end of period	$ 12,698,000	$ 12,279,000	12,698,000	12,279,000	$ 41,621,000
Supplemental information:
Income tax paid			179,000	225,000
Interest paid			2,640,000	3,120,000
Supplemental schedule of noncash investing and financing activities:
Transfer of loans to other real estate owned			61,000	0
Transfer of loans to repossessed vehicles			$ 1,000	$ 29,000