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 at Dec. 31, 2018	$ 690,200	$ 51,382,585	$ (36,971,124)	$ 65,829,687	$ (452,756)	$ 80,478,592
Net income				2,120,364		2,120,364
Other comprehensive loss					380,791	380,791
Dividends on common stock				(582,817)		(582,817)
Stock award plans		(53,689)	222,789			169,100
Stock options exercised	1,000	50,900				51,900
Balance at Mar. 31, 2019	691,200	51,379,796	(36,748,335)	67,367,234	(71,965)	82,617,930
Balance at Dec. 31, 2019	691,950	51,908,867	(40,398,650)	72,860,750	(431,035)	84,631,882
Net income				2,104,845		2,104,845
Other comprehensive loss					(1,985,859)	(1,985,859)
Dividends on common stock				(654,735)		(654,735)
Treasury stock purchased			(390,268)			(390,268)
Stock award plans		(636,438)	693,787			57,349
Balance at Mar. 31, 2020	$ 691,950	$ 51,272,429	$ (40,095,131)	$ 74,310,860	$ (2,416,894)	$ 83,763,214