CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Total
Beginning balance, value at Dec. 31, 2020		$ 47,404,869	$ 8,693,519	$ (2,787,898)	$ 1,669,866	$ 54,980,356
Beginning balance (in shares) at Dec. 31, 2020	5,520,469
Net income			1,810,075			1,810,075
Other comprehensive income (loss)					(2,343,977)	(2,343,977)
Stock option exercises		39,589		(8,344)		31,245
Stock option exercises (in shares)	4,147
Stock-based compensation expense		22,997				22,997
Cash dividends			(1,491,646)			(1,491,646)
Ending balance, value at Mar. 31, 2021		47,467,455	9,011,948	(2,796,242)	(674,111)	53,009,050
Ending balance (in shares) at Mar. 31, 2021	5,524,616
Beginning balance, value at Dec. 31, 2020		47,404,869	8,693,519	(2,787,898)	1,669,866	54,980,356
Beginning balance (in shares) at Dec. 31, 2020	5,520,469
Net income						5,205,696
Other comprehensive income (loss)						(2,608,793)
Ending balance, value at Sep. 30, 2021		47,653,641	10,525,556	(2,817,392)	(938,927)	54,422,878
Ending balance (in shares) at Sep. 30, 2021	5,536,661
Beginning balance, value at Mar. 31, 2021		47,467,455	9,011,948	(2,796,242)	(674,111)	53,009,050
Beginning balance (in shares) at Mar. 31, 2021	5,524,616
Net income			1,668,684			1,668,684
Other comprehensive income (loss)					614,215	614,215
Stock option exercises		103,495		(21,150)		82,345
Stock option exercises (in shares)	9,383
Stock-based compensation expense		29,648				29,648
Cash dividends			(940,781)			(940,781)
Ending balance, value at Jun. 30, 2021		47,600,598	9,739,851	(2,817,392)	(59,896)	54,463,161
Ending balance (in shares) at Jun. 30, 2021	5,533,999
Net income			1,726,937			1,726,937
Other comprehensive income (loss)					(879,031)	(879,031)
Stock option exercises		24,438				24,438
Stock option exercises (in shares)	2,662
Stock-based compensation expense		28,605				28,605
Cash dividends			(941,232)			(941,232)
Ending balance, value at Sep. 30, 2021		47,653,641	10,525,556	(2,817,392)	(938,927)	54,422,878
Ending balance (in shares) at Sep. 30, 2021	5,536,661
Beginning balance, value at Dec. 31, 2021		47,745,285	11,122,710	(2,817,392)	(2,132,970)	$ 53,917,633
Beginning balance (in shares) at Dec. 31, 2021	5,541,266					5,541,266
Net income			1,464,106			$ 1,464,106
Other comprehensive income (loss)					(9,649,453)	(9,649,453)
Stock option exercises		141,618				141,618
Stock option exercises (in shares)	9,210
Stock-based compensation expense		27,989				27,989
Cash dividends			(943,580)			(943,580)
Ending balance, value at Mar. 31, 2022		47,914,892	11,643,236	(2,817,392)	(11,782,423)	44,958,313
Ending balance (in shares) at Mar. 31, 2022	5,550,476
Beginning balance, value at Dec. 31, 2021		47,745,285	11,122,710	(2,817,392)	(2,132,970)	$ 53,917,633
Beginning balance (in shares) at Dec. 31, 2021	5,541,266					5,541,266
Net income						$ 4,847,355
Other comprehensive income (loss)						(20,172,509)
Ending balance, value at Sep. 30, 2022		47,997,431	13,138,685	(2,817,392)	(22,305,479)	$ 36,013,245
Ending balance (in shares) at Sep. 30, 2022	5,552,351					5,552,351
Beginning balance, value at Mar. 31, 2022		47,914,892	11,643,236	(2,817,392)	(11,782,423)	$ 44,958,313
Beginning balance (in shares) at Mar. 31, 2022	5,550,476
Net income			1,542,982			1,542,982
Other comprehensive income (loss)					(3,991,447)	(3,991,447)
Stock option exercises		20,022				20,022
Stock option exercises (in shares)	1,875
Stock-based compensation expense		31,258				31,258
Cash dividends			(943,900)			(943,900)
Ending balance, value at Jun. 30, 2022		47,966,172	12,242,318	(2,817,392)	(15,773,870)	41,617,228
Ending balance (in shares) at Jun. 30, 2022	5,552,351
Net income			1,840,267			1,840,267
Other comprehensive income (loss)					(6,531,609)	(6,531,609)
Stock-based compensation expense		31,259				31,259
Cash dividends			(943,900)			(943,900)
Ending balance, value at Sep. 30, 2022		$ 47,997,431	$ 13,138,685	$ (2,817,392)	$ (22,305,479)	$ 36,013,245
Ending balance (in shares) at Sep. 30, 2022	5,552,351					5,552,351