Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest income:
Interest and fees on loans	$ 21,835,586	$ 18,762,728	$ 16,299,091
Interest on debt securities: Taxable	1,684,048	1,363,123	1,286,473
Interest on debt securities: Tax-exempt	843,575	1,090,871	1,228,479
Dividends	105,011	144,856	102,360
Interest on deposits in other banks	496,582	484,724	195,032
Interest on certificates of deposit in other banks	71,482	47,870	34,879
Total interest income	25,036,284	21,894,172	19,146,314
Interest expense:
Deposits	3,848,800	2,383,524	1,153,609
Federal funds purchased	22	1,097	1,068
Other short-term borrowings	123,892	395,989	224,144
Long-term debt	480,936	541,804	523,344
Total interest expense	4,453,650	3,322,414	1,902,165
Net interest income	20,582,634	18,571,758	17,244,149
Provision for loan losses	856,676	829,500	300,000
Net interest income after provision for loan losses	19,725,958	17,742,258	16,944,149
Noninterest income:
Service charges on deposit accounts	928,777	1,015,498	1,005,270
Income from trust services	221,006	234,649	218,657
Income from brokerage services	359,501	399,278	362,416
Income from insurance services	1,741,018	1,603,557	1,523,309
Income from mortgage banking services	0	2,475	155,053
Net gain (loss) on sale or disposition of assets	288,049	(79,529)	(9,022)
Net gain (loss) on sale of securities	174,283	(165,369)	186,610
Net gain on extinguishment of debt	143,031	317,832	0
Other income	960,902	878,340	870,229
Total noninterest income	4,816,567	4,206,731	4,312,522
Noninterest expense:
Salaries and employee benefits	10,247,200	9,724,826	9,250,777
Occupancy expense	1,259,476	1,194,552	1,124,028
Equipment expense	1,219,682	933,485	850,376
Data processing expense	1,648,936	1,445,215	1,513,630
Amortization of intangible assets	3,907	15,625	15,625
Other operating expenses	3,726,498	3,319,751	3,074,843
Total noninterest expenses	18,105,699	16,633,454	15,829,279
Income before income taxes	6,436,826	5,315,535	5,427,392
Provision for income taxes	1,146,586	668,416	1,619,900
Net income	$ 5,290,240	$ 4,647,119	$ 3,807,492
Basic earnings per share:
Net income	$ 2.08	$ 1.83	$ 1.49
Weighted average shares outstanding	2,545,672	2,545,565	2,547,421
Diluted earnings per share:
Net income	$ 2.08	$ 1.83	$ 1.49
Weighted average shares outstanding	2,545,672	2,545,565	2,547,422