CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($)	Common Stock [Member]	AOCI Attributable to Parent [Member]	Unearned Compensation [Member]	Retained Earnings [Member]	Total
BALANCE at Dec. 31, 2019	$ 8,648,697	$ (186,095)	$ 189,255	$ 72,106,198	$ 80,758,055
BALANCE (in Shares) at Dec. 31, 2019	5,189,218
Directors' Stock Plan	$ 20,440			179,464	199,904
Directors' Stock Plan (in Shares)	12,264
Employee Stock Plan	$ 11,618			92,947	104,565
Employee Stock Plan (in Shares)	6,971
Restricted Stock Grant			60,978		60,978
Exercise of RSU's	$ 6,907		(126,616)	71,829	(47,880)
Exercise of RSU's (in Shares)	4,144
Repurchase of Common Stock	$ (22,493)			(216,119)	(238,612)
Repurchase of Common Stock (in Shares)	(13,496)
Net Income				7,425,239	7,425,239
Dividends				(674,171)	(674,171)
Unrealized Gain on Interest Rate Swap		(1,981,794)			(1,981,794)
BALANCE at Sep. 30, 2020	$ 8,665,169	(2,167,889)	123,617	78,985,387	85,606,284
BALANCE (in Shares) at Sep. 30, 2020	5,199,101
BALANCE at Dec. 31, 2019	$ 8,648,697	(186,095)	189,255	72,106,198	80,758,055
BALANCE (in Shares) at Dec. 31, 2019	5,189,218
BALANCE at Dec. 31, 2020	$ 8,667,816	(1,944,511)	149,100	80,748,301	87,620,706
BALANCE (in Shares) at Dec. 31, 2020	5,200,689
BALANCE at Jun. 30, 2020	$ 8,665,169	(2,273,561)	100,440	76,525,033	83,017,081
BALANCE (in Shares) at Jun. 30, 2020	5,199,101
Restricted Stock Grant			23,177		23,177
Net Income				2,460,354	2,460,354
Unrealized Gain on Interest Rate Swap		105,672			105,672
BALANCE at Sep. 30, 2020	$ 8,665,169	(2,167,889)	123,617	78,985,387	85,606,284
BALANCE (in Shares) at Sep. 30, 2020	5,199,101
BALANCE at Dec. 31, 2020	$ 8,667,816	(1,944,511)	149,100	80,748,301	87,620,706
BALANCE (in Shares) at Dec. 31, 2020	5,200,689
Directors' Stock Plan	$ 14,000			185,920	199,920
Directors' Stock Plan (in Shares)	8,400
Employee Stock Plan	$ 7,657			101,083	108,740
Employee Stock Plan (in Shares)	4,594
Restricted Stock Grant			153,200		153,200
Exercise of RSU's	$ 3,060		(43,458)	40,398
Exercise of RSU's (in Shares)	1,836
Repurchase of Common Stock	$ (11,714)			(155,753)	(167,467)
Repurchase of Common Stock (in Shares)	(7,028)
Net Income				9,868,920	9,868,920
Dividends				(2,135,027)	(2,135,027)
Unrealized Gain on Interest Rate Swap		854,077			854,077
BALANCE at Sep. 30, 2021	$ 8,680,819	(1,090,434)	258,842	88,653,842	96,503,069
BALANCE (in Shares) at Sep. 30, 2021	5,208,491
BALANCE at Jun. 30, 2021	$ 8,687,486	(1,235,348)	225,586	87,226,467	94,904,191
BALANCE (in Shares) at Jun. 30, 2021	5,212,491
Restricted Stock Grant			33,256		33,256
Repurchase of Common Stock	$ (6,667)			(88,733)	(95,400)
Repurchase of Common Stock (in Shares)	(4,000)
Net Income				2,245,296	2,245,296
Dividends				(729,188)	(729,188)
Unrealized Gain on Interest Rate Swap		144,914			144,914
BALANCE at Sep. 30, 2021	$ 8,680,819	$ (1,090,434)	$ 258,842	$ 88,653,842	$ 96,503,069
BALANCE (in Shares) at Sep. 30, 2021	5,208,491