Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2017 - 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, 2016	$ 687,550	$ 50,552,077	$ (37,303,288)	$ 57,347,282	$ (1,309,241)	$ 69,974,380
Net income				4,739,197		4,739,197
Change in unrealized gain on available-for-sale securities and effect of interest rate swaps, net of income taxes					936,465	936,465
Dividends on common stock				(1,326,483)		(1,326,483)
Stock award plans		153,238	177,747			330,985
Balance at Sep. 30, 2017	$ 687,550	$ 50,705,315	$ (37,125,541)	$ 60,759,996	$ (372,776)	$ 74,654,544