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 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 loss					(2,343,977)	(2,343,977)
Stock option exercises, net of surrenders		39,589		(8,344)		31,245
Stock option exercises, net of surrenders (in shares)	4,147
Stock-based compensation expense		22,997				22,997
Cash dividends			(1,491,646)			(1,491,646)
Ending balance 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 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						3,478,759
Other comprehensive loss						(1,729,762)
Ending balance 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
Beginning balance 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 loss					614,215	614,215
Stock option exercises, net of surrenders		103,495		(21,150)		82,345
Stock option exercises, net of surrenders (in shares)	9,383
Stock-based compensation expense		29,648				29,648
Cash dividends			(940,781)			(940,781)
Ending balance 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
Beginning balance 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 loss					(9,649,453)	(9,649,453)
Stock option exercises, net of surrenders		141,618				141,618
Stock option exercises, net of surrenders (in shares)	9,210
Stock-based compensation expense		27,989				27,989
Cash dividends			(943,580)			(943,580)
Ending balance 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 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						$ 3,007,088
Other comprehensive loss						(13,640,900)
Ending balance 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					5,552,351
Beginning balance 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 loss					(3,991,447)	(3,991,447)
Stock option exercises, net of surrenders		20,022				20,022
Stock option exercises, net of surrenders (in shares)	1,875
Stock-based compensation expense		31,258				31,258
Cash dividends			(943,900)			(943,900)
Ending balance 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					5,552,351