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, 2021	$ 88,340,552	$ 573,192	$ 36,741,266	$ 1,835,721	$ 54,798,980	$ (5,608,607)
Balances, shares at Dec. 31, 2021		34,405,287
Balances, Treasury shares at Dec. 31, 2021						(377,232)
Net income (loss)	(4,020,455)				(4,020,455)
Cost of equity issuance	(48,166)		(48,166)
At-the market offering	8,017	$ 45	7,972
At-the market offering, shares		2,710
Restricted stock award expense	433,137		433,137
Distribution of deferred directors' compensation		$ 1,024	462,735	(463,759)
Distribution of deferred directors' compensation, shares		61,452
Increase in deferred directors' compensation charged to expense	35,461			35,461
Balances at Mar. 31, 2022	84,748,546	$ 574,261	37,596,944	1,407,423	50,778,525	$ (5,608,607)
Balances, shares at Mar. 31, 2022		34,469,449
Balances, Treasury shares at Mar. 31, 2022						(377,232)
Balances at Dec. 31, 2021	88,340,552	$ 573,192	36,741,266	1,835,721	54,798,980	$ (5,608,607)
Balances, shares at Dec. 31, 2021		34,405,287
Balances, Treasury shares at Dec. 31, 2021						(377,232)
Net income (loss)	4,568,555
Balances at Jun. 30, 2022	97,963,170	$ 594,445	42,849,595	1,451,690	58,676,047	$ (5,608,607)
Balances, shares at Jun. 30, 2022		35,680,970
Balances, Treasury shares at Jun. 30, 2022						(377,232)
Balances at Mar. 31, 2022	84,748,546	$ 574,261	37,596,944	1,407,423	50,778,525	$ (5,608,607)
Balances, shares at Mar. 31, 2022		34,469,449
Balances, Treasury shares at Mar. 31, 2022						(377,232)
Net income (loss)	8,589,010				8,589,010
At-the market offering	4,742,769	$ 20,184	4,722,585
At-the market offering, shares		1,211,521
Restricted stock award expense	530,066		530,066
Dividends	(691,488)				(691,488)
Increase in deferred directors' compensation charged to expense	44,267			44,267
Balances at Jun. 30, 2022	97,963,170	$ 594,445	42,849,595	1,451,690	58,676,047	$ (5,608,607)
Balances, shares at Jun. 30, 2022		35,680,970
Balances, Treasury shares at Jun. 30, 2022						(377,232)
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)					(300,272)
Net income (loss)	$ 9,553,244				9,553,244
Restricted stock award expense	580,998		580,998
Dividends	(50,034)				(50,034)
Distribution of restricted stock to employees and directors			(766,846)			$ 766,846
Distribution of restricted stock to employees 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)					(300,272)
Net income (loss)	$ 9,511,953
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)					(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	(832,498)				(832,498)
Distribution of restricted stock to employees and directors		$ 11	(11)
Distribution of restricted stock to employees 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)					(225,723)