CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - 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, 2019		$ 47,131,034	$ 5,879,409	$ (2,325,225)	$ 482,814	$ 51,168,032
Beginning balance (in shares) at Dec. 31, 2019	5,530,001
Net income			1,521,131			1,521,131
Other comprehensive income					601,016	601,016
Stock option exercises, net of surrenders		4,489				4,489
Stock option exercises, net of surrenders (in shares)	362
Stock-based compensation expense		16,418				16,418
Cash dividends			(884,859)			(884,859)
Ending balance at Mar. 31, 2020		47,151,941	6,515,681	(2,325,225)	1,083,830	52,426,227
Ending balance (in shares) at Mar. 31, 2020	5,530,363
Beginning balance at Dec. 31, 2019		47,131,034	5,879,409	(2,325,225)	482,814	51,168,032
Beginning balance (in shares) at Dec. 31, 2019	5,530,001
Net income						3,022,204
Other comprehensive income						1,571,664
Ending balance at Jun. 30, 2020		47,290,003	7,131,796	(2,515,472)	2,054,528	53,960,855
Ending balance (in shares) at Jun. 30, 2020	5,530,682
Beginning balance at Mar. 31, 2020		47,151,941	6,515,681	(2,325,225)	1,083,830	52,426,227
Beginning balance (in shares) at Mar. 31, 2020	5,530,363
Net income			1,501,023			1,501,023
Other comprehensive income					970,698	970,698
Stock option exercises, net of surrenders		108,757		(41,697)		67,060
Stock option exercises, net of surrenders (in shares)	9,619
Stock-based compensation expense		29,305				29,305
Repurchase of common shares				(148,550)		(148,550)
Repurchase of common shares (in shares)	(9,300)
Cash dividends			(884,908)			(884,908)
Ending balance at Jun. 30, 2020		47,290,003	7,131,796	(2,515,472)	2,054,528	53,960,855
Ending balance (in shares) at Jun. 30, 2020	5,530,682
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					5,520,469
Net income			1,810,075			$ 1,810,075
Other comprehensive income					(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					5,520,469
Net income						$ 3,478,759
Other comprehensive income						(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					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 income					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					5,533,999