Statements Of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Deferred Directors' Compensation [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balances at Dec. 31, 2022	$ 110,103,126	$ 598,731	$ 43,344,916	$ 1,541,070	$ 68,925,774	$ (4,307,365)
Balances, shares at Dec. 31, 2022		35,938,206
Balances, Treasury shares at Dec. 31, 2022						(300,272)
Net income (loss)	9,553,244				9,553,244
Restricted stock award expense	580,998		580,998
Dividends declared	(50,034)				(50,034)
Distribution of restricted stock to officers and directors			(766,846)			$ 766,846
Distribution of restricted stock to officers and directors, shares						53,476
Distribution of deferred directors' compensation			(24,330)	(281,497)		$ 305,827
Distribution of deferred directors' compensation, shares						21,312
Increase in deferred directors' compensation charged to expense	53,589			53,589
Balances at Mar. 31, 2023	120,240,923	$ 598,731	43,134,738	1,313,162	78,428,984	$ (3,234,692)
Balances, shares at Mar. 31, 2023		35,938,206
Balances, Treasury shares at Mar. 31, 2023						(225,484)
Balances at Dec. 31, 2022	110,103,126	$ 598,731	43,344,916	1,541,070	68,925,774	$ (4,307,365)
Balances, shares at Dec. 31, 2022		35,938,206
Balances, Treasury shares at Dec. 31, 2022						(300,272)
Net income (loss)	11,407,356
Balances at Sep. 30, 2023	121,655,992	$ 598,742	44,249,366	1,425,155	78,618,090	$ (3,235,361)
Balances, shares at Sep. 30, 2023		35,938,900
Balances, Treasury shares at Sep. 30, 2023						(225,723)
Balances at Mar. 31, 2023	120,240,923	$ 598,731	43,134,738	1,313,162	78,428,984	$ (3,234,692)
Balances, shares at Mar. 31, 2023		35,938,206
Balances, Treasury shares at Mar. 31, 2023						(225,484)
Net income (loss)	(41,291)				(41,291)
Purchase of treasury stock	(669)					$ (669)
Purchase of treasury stock, shares						(239)
Restricted stock award expense	647,873		647,873
Dividends declared	(832,498)				(832,498)
Distribution of restricted stock to officers and directors		$ 11	(11)
Distribution of restricted stock to officers and directors, shares		694
Increase in deferred directors' compensation charged to expense	55,794			55,794
Balances at Jun. 30, 2023	120,070,132	$ 598,742	43,782,600	1,368,956	77,555,195	$ (3,235,361)
Balances, shares at Jun. 30, 2023		35,938,900
Balances, Treasury shares at Jun. 30, 2023						(225,723)
Net income (loss)	1,895,403				1,895,403
Restricted stock award expense	466,766		466,766
Dividends declared	(832,508)				(832,508)
Increase in deferred directors' compensation charged to expense	56,199			56,199
Balances at Sep. 30, 2023	121,655,992	$ 598,742	44,249,366	1,425,155	78,618,090	$ (3,235,361)
Balances, shares at Sep. 30, 2023		35,938,900
Balances, Treasury shares at Sep. 30, 2023						(225,723)
Balances at Dec. 31, 2023	$ 123,231,414	$ 601,788	41,676,417	1,487,590	80,022,839	$ (557,220)
Balances, shares at Dec. 31, 2023		36,121,723
Balances, Treasury shares at Dec. 31, 2023	131,477					(131,477)
Net income (loss)	$ (183,615)				(183,615)
Restricted stock award expense	656,656		656,656
Dividends declared	(1,121,314)				(1,121,314)
Distribution of deferred directors' compensation			70,344	(107,199)		$ 36,855
Distribution of deferred directors' compensation, shares						8,692
Increase in deferred directors' compensation charged to expense	45,132			45,132
Balances at Mar. 31, 2024	122,628,273	$ 601,788	42,403,417	1,425,523	78,717,910	$ (520,365)
Balances, shares at Mar. 31, 2024		36,121,723
Balances, Treasury shares at Mar. 31, 2024						(122,785)
Balances at Dec. 31, 2023	$ 123,231,414	$ 601,788	41,676,417	1,487,590	80,022,839	$ (557,220)
Balances, shares at Dec. 31, 2023		36,121,723
Balances, Treasury shares at Dec. 31, 2023	131,477					(131,477)
Net income (loss)	$ 2,212,466
Balances at Sep. 30, 2024	$ 123,612,869	$ 601,788	43,526,595	1,276,295	78,492,889	$ (284,698)
Balances, shares at Sep. 30, 2024		36,121,723
Balances, Treasury shares at Sep. 30, 2024	67,203					(67,203)
Balances at Mar. 31, 2024	$ 122,628,273	$ 601,788	42,403,417	1,425,523	78,717,910	$ (520,365)
Balances, shares at Mar. 31, 2024		36,121,723
Balances, Treasury shares at Mar. 31, 2024						(122,785)
Net income (loss)	1,295,771				1,295,771
Restricted stock award expense	651,030		651,030
Dividends declared	(1,122,599)				(1,122,599)
Increase in deferred directors' compensation charged to expense	45,529			45,529
Balances at Jun. 30, 2024	123,498,004	$ 601,788	43,054,447	1,471,052	78,891,082	$ (520,365)
Balances, shares at Jun. 30, 2024		36,121,723
Balances, Treasury shares at Jun. 30, 2024						(122,785)
Net income (loss)	1,100,310				1,100,310
Restricted stock award expense	466,103		466,103
Dividends declared	(1,498,503)				(1,498,503)
Distribution of deferred directors' compensation			6,045	(241,712)		$ 235,667
Distribution of deferred directors' compensation, shares						55,582
Increase in deferred directors' compensation charged to expense	46,955			46,955
Balances at Sep. 30, 2024	$ 123,612,869	$ 601,788	$ 43,526,595	$ 1,276,295	$ 78,492,889	$ (284,698)
Balances, shares at Sep. 30, 2024		36,121,723
Balances, Treasury shares at Sep. 30, 2024	67,203					(67,203)