Quarterly Data - Schedule of Quarterly Data (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Interest and dividend income	$ 6,572,000	$ 6,355,000	$ 6,147,000	$ 5,962,000	$ 5,900,000	$ 5,640,000	$ 5,292,000	$ 5,062,000
Interest expense	1,013,000	1,150,000	1,095,000	1,196,000	1,116,000	867,000	725,000	614,000	$ 4,453,650	$ 3,322,414	$ 1,902,165
Net interest income	5,559,000	5,205,000	5,052,000	4,766,000	4,784,000	4,773,000	4,567,000	4,448,000	20,582,634	18,571,758	17,244,149
Provision for loan losses	112,000	379,000	250,000	116,000	226,000	249,000	140,000	215,000	856,676	829,500	300,000
Net interest income after provision for loan losses	5,447,000	4,826,000	4,802,000	4,650,000	4,558,000	4,524,000	4,427,000	4,233,000	19,725,958	17,742,258	16,944,149
Noninterest income	1,081,000	1,192,000	1,307,000	1,237,000	1,175,000	978,000	1,060,000	994,000	4,816,567	4,206,731	4,312,522
Noninterest expenses	4,918,000	4,221,000	4,550,000	4,416,000	4,357,000	4,149,000	4,132,000	3,996,000	18,105,699	16,633,454	15,829,279
Income before income taxes	1,610,000	1,797,000	1,559,000	1,471,000	1,376,000	1,353,000	1,355,000	1,231,000
Provision for income taxes	278,000	365,000	261,000	243,000	253,000	209,000	207,000	(1,000)	1,146,586	668,416	1,619,900
Net income	$ 1,332,000	$ 1,432,000	$ 1,298,000	$ 1,228,000	$ 1,123,000	$ 1,144,000	$ 1,148,000	$ 1,232,000	$ 5,290,240	$ 4,647,119	$ 3,807,492
Basic	$ 0.53	$ 0.56	$ 0.51	$ 0.48	$ 0.44	$ 0.45	$ 0.45	$ 0.48	$ 2.08	$ 1.83	$ 1.49
Diluted	$ 0.53	$ 0.56	$ 0.51	$ 0.48	$ 0.44	$ 0.45	$ 0.45	$ 0.48	$ 2.08	$ 1.83	$ 1.49