Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Preferred Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Total
Beginning Balance at Dec. 31, 2017	$ 13,305,800	$ 2,500,000	$ 31,639,189	$ 13,387,739	$ (274,097)	$ (2,622,777)	$ 57,935,854
Issuance of common stock	33,345		207,208				240,553
Cash dividends declared - common stock				(869,128)			(869,128)
Cash dividends declared - preferred stock				(28,125)			(28,125)
Redemption of preferred stock		(500,000)					(500,000)
Comprehensive income
Net income				1,982,543			1,982,543
Other comprehensive loss					(452,876)		(452,876)
Ending Balance at Mar. 31, 2018	13,339,145	2,000,000	31,846,397	14,473,029	(726,973)	(2,622,777)	58,308,821
Beginning Balance at Dec. 31, 2017	13,305,800	2,500,000	31,639,189	13,387,739	(274,097)	(2,622,777)	57,935,854
Comprehensive income
Net income							6,254,929
Other comprehensive loss							(679,159)
Ending Balance at Sep. 30, 2018	13,418,398	2,000,000	32,303,813	16,745,737	(953,256)	(2,622,777)	60,891,915
Beginning Balance at Mar. 31, 2018	13,339,145	2,000,000	31,846,397	14,473,029	(726,973)	(2,622,777)	58,308,821
Issuance of common stock	36,183		202,203				238,386
Cash dividends declared - common stock				(973,992)			(973,992)
Cash dividends declared - preferred stock				(23,750)			(23,750)
Comprehensive income
Net income				2,002,654			2,002,654
Other comprehensive loss					(95,486)		(95,486)
Ending Balance at Jun. 30, 2018	13,375,328	2,000,000	32,048,600	15,477,941	(822,459)	(2,622,777)	59,456,633
Issuance of common stock	43,070		255,213				298,283
Cash dividends declared - common stock				(976,936)			(976,936)
Cash dividends declared - preferred stock				(25,000)			(25,000)
Comprehensive income
Net income				2,269,732			2,269,732
Other comprehensive loss					(130,797)		(130,797)
Ending Balance at Sep. 30, 2018	13,418,398	2,000,000	32,303,813	16,745,737	(953,256)	(2,622,777)	60,891,915
Beginning Balance at Dec. 31, 2018	13,455,258	2,000,000	32,536,532	17,882,282	(647,584)	(2,622,777)	62,603,711
Issuance of common stock	49,415		263,611				313,026
Cash dividends declared - common stock				(983,122)			(983,122)
Cash dividends declared - preferred stock				(27,500)			(27,500)
Redemption of preferred stock		(500,000)					(500,000)
Comprehensive income
Net income				1,771,905			1,771,905
Other comprehensive loss					451,690		451,690
Ending Balance at Mar. 31, 2019	13,504,673	1,500,000	32,800,143	18,643,565	(195,894)	(2,622,777)	63,629,710
Beginning Balance at Dec. 31, 2018	13,455,258	2,000,000	32,536,532	17,882,282	(647,584)	(2,622,777)	62,603,711
Comprehensive income
Net income							6,453,146
Other comprehensive loss							962,715
Ending Balance at Sep. 30, 2019	13,582,023	1,500,000	33,239,064	21,307,847	315,131	(2,622,777)	67,321,288
Beginning Balance at Mar. 31, 2019	13,504,673	1,500,000	32,800,143	18,643,565	(195,894)	(2,622,777)	63,629,710
Issuance of common stock	41,825		234,664				276,489
Cash dividends declared - common stock				(986,368)			(986,368)
Cash dividends declared - preferred stock				(20,625)			(20,625)
Comprehensive income
Net income				2,419,298			2,419,298
Other comprehensive loss					353,470		353,470
Ending Balance at Jun. 30, 2019	13,546,498	1,500,000	33,034,807	20,055,870	157,576	(2,622,777)	65,671,974
Issuance of common stock	35,525		204,257				239,782
Cash dividends declared - common stock				(989,341)			(989,341)
Cash dividends declared - preferred stock				(20,625)			(20,625)
Comprehensive income
Net income				2,261,943			2,261,943
Other comprehensive loss					157,555		157,555
Ending Balance at Sep. 30, 2019	$ 13,582,023	$ 1,500,000	$ 33,239,064	$ 21,307,847	$ 315,131	$ (2,622,777)	$ 67,321,288