Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 3,807,492	$ 4,033,977	$ 3,373,635
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	300,000	160,000	141,300
Depreciation	881,000	923,578	961,964
Net amortization of investment securities	396,899	309,185	307,861
Income on cash surrender value of bank owned life insurance	(133,398)	(125,290)	(147,601)
Disposal of fixed assets to charitable expense	13,045	0	0
Amortization of intangibles	15,625	15,625	15,625
Loss (gain) on sale/writedown of foreclosed assets	8,892	0	(13,077)
Net gain on sale of securities	(186,610)	(168,919)	(3,587)
Net loss (gain) on disposal of other assets	1,594	(36,701)	(9,305)
Change in:
Other assets	489,903	(253,894)	52,322
Other liabilities	288,505	324,142	(208,670)
Net cash provided by operating activities	5,882,947	5,181,703	4,470,467
Cash flows from investing activities:
Proceeds from calls, paydowns and maturities of securities HTM	10,070,453	5,952,271	5,115,703
Proceeds from calls, paydowns and maturities of securities AFS	635,818	10,354,337	4,143,139
Proceeds from Federal Home Loan Bank Stock repurchase	705,100	413,700	141,600
Proceeds from sale of securities available for sale	5,741,211	11,933,634	4,044,500
Proceeds from sale of securities held to maturity	0	576,834	516,746
Proceeds from maturity of  certificates of deposit in other banks	0	245,000	1,225,000
Purchase of securities held to maturity	(265,000)	(478,559)	(5,207,650)
Purchase of securities available for sale	(7,039,139)	(25,129,827)	(5,709,379)
Purchase of Federal Home Loan Bank Stock	(1,269,100)	(418,700)	(450,800)
Purchase certificates of deposit in other banks	(1,985,000)	0	0
Net change in loans	(38,895,975)	(41,850,494)	(26,517,707)
Purchase bank owned life insurance	(1,063,237)	0	0
Proceeds from bank owned life insurance	0	0	30,011
Purchase of premises and equipment	(1,955,067)	(1,455,043)	(370,837)
Proceeds from sales of fixed assets and foreclosed assets	233,553	304,825	201,000
Net cash used by investing activities	(35,086,383)	(39,552,022)	(22,838,674)
Cash flows from financing activities:
Net change in deposits	25,512,772	32,477,143	29,042,251
Payment of short-term portion of long-term debt	(13,447,619)	(7,590,476)	(5,133,333)
Proceeds from issuance of short-term debt	7,857,143	857,143	2,457,143
Proceeds from issuance of long-term debt	18,142,857	5,142,857	11,542,857
Cash dividends paid	(1,120,872)	(1,070,047)	(1,019,135)
Payment for treasury stock	(122,340)	(6,658)	0
Net cash provided by financing activities	36,821,941	29,809,962	36,889,783
Increase (decrease) in cash and cash equivalents	7,618,505	(4,560,357)	18,521,576
Cash and cash equivalents - beginning of period	26,519,916	31,080,273	12,558,697
Cash and cash equivalents - end of period	34,138,421	26,519,916	31,080,273
Cash paid during the year for:
Income taxes	895,000	964,000	725,000
Interest paid	1,881,924	1,600,593	1,314,156
NONCASH ITEMS:
Increase in foreclosed properties and decrease in loans	903,842	44,963	241,980
Unrealized gain (loss) on securities AFS	140,074	(848,222)	134,774
Unrealized gain (loss) on pension plan benefits	503,167	(110,306)	(1,032,035)
Net reclass between short and long-term debt	15,114,286	7,590,476	5,133,333
Sale of foreclosed properties through loans	38,000	0	334,000
Property moved from fixed assets to property held for sale	$ 0	$ 211,500	$ 0