Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance	$ 691,950	$ 51,908,867	$ (40,398,650)	$ 72,860,750	$ (431,035)	$ 84,631,882
Balance at Dec. 31, 2019	691,950	51,908,867	(40,398,650)	72,860,750	(431,035)	84,631,882
Net income	0	0	0	2,104,845	0	2,104,845
Other comprehensive income (loss)	0	0	0	0	(1,985,859)	(1,985,859)
Dividends on common stock	0	0	0	(654,735)	0	(654,735)
Stock award plans	0	(636,438)	693,787	0	0	57,349
Treasury stock purchased	0	0	(390,268)	0	0	(390,268)
Stock award plans	0	636,438	(693,787)	0	0	(57,349)
Balance at Mar. 31, 2020	691,950	51,272,429	(40,095,131)	74,310,860	(2,416,894)	83,763,214
NET INCOME	0	0	0	2,104,845	0	2,104,845
Stock award plans	0	636,438	(693,787)	0	0	(57,349)
Balance	691,950	51,272,429	(40,095,131)	74,310,860	(2,416,894)	83,763,214
Balance	691,950	51,272,429	(40,095,131)	74,310,860	(2,416,894)	83,763,214
Net income	0	0	0	1,883,383	0	1,883,383
Other comprehensive income (loss)	0	0	0	0	846,436	846,436
Dividends on common stock	0	0	0	(655,127)	0	(655,127)
Stock award plans	0	(83,844)	26,343	0	0	(57,501)
Stock award plans	0	83,844	(26,343)	0	0	57,501
Balance at Jun. 30, 2020	691,950	51,188,585	(40,068,788)	75,539,116	(1,570,458)	85,780,405
NET INCOME	0	0	0	1,883,383	0	1,883,383
Stock award plans	0	83,844	(26,343)	0	0	57,501
Balance	691,950	51,188,585	(40,068,788)	75,539,116	(1,570,458)	85,780,405
Balance	691,950	51,188,585	(40,068,788)	75,539,116	(1,570,458)	85,780,405
Net income	0	0	0	1,897,776	0	1,897,776
Other comprehensive income (loss)	0	0	0	0	701,706	701,706
Dividends on common stock	0	0	0	(654,547)	0	(654,547)
Stock award plans	(0)	(117,252)	35,879	(0)	(0)	(81,373)
Stock award plans	0	117,252	(35,879)	0	0	81,373
Balance at Sep. 30, 2020	691,950	51,305,837	(40,104,667)	76,782,345	(868,752)	87,806,713
NET INCOME	0	0	0	1,897,776	0	1,897,776
Stock award plans	0	117,252	(35,879)	0	0	81,373
Balance	691,950	51,305,837	(40,104,667)	76,782,345	(868,752)	87,806,713
Balance	691,950	51,305,837	(40,104,667)	76,782,345	(868,752)	87,806,713
Net income	0	0	0	946,210	0	946,210
Other comprehensive income (loss)	0	0	0	0	815,374	815,374
Dividends on common stock	0	0	0	(654,848)	0	(654,848)
Stock award plans	(0)	(31,382)	(23,535)	(0)	(0)	(54,917)
Stock award plans	0	31,382	23,535	0	0	54,917
Balance at Dec. 31, 2020	691,950	51,337,219	(40,081,132)	77,073,707	(53,378)	88,968,366
NET INCOME	0	0	0	946,210	0	946,210
Stock award plans	0	31,382	23,535	0	0	54,917
Balance	691,950	51,305,837	(40,104,667)	76,782,345	(868,752)	87,806,713
Balance	691,950	51,337,219	(40,081,132)	77,073,707	(53,378)	88,968,366
Net income	0	0	0	2,216,016	0	2,216,016
Other comprehensive income (loss)	0	0	0	0	(1,311,476)	(1,311,476)
Dividends on common stock	0	0	0	(654,754)	0	(654,754)
Stock award plans	0	(195,671)	304,057	0	0	108,386
Stock award plans	0	195,671	(304,057)	0	0	(108,386)
Balance at Mar. 31, 2021	691,950	51,141,548	(39,777,075)	78,634,969	(1,364,854)	89,326,538
NET INCOME	0	0	0	2,216,016	0	2,216,016
Stock award plans	0	195,671	(304,057)	0	0	(108,386)
Balance	691,950	51,141,548	(39,777,075)	78,634,969	(1,364,854)	88,968,366
Balance	$ 691,950	$ 51,141,548	$ (39,777,075)	$ 78,634,969	$ (1,364,854)	$ 89,326,538