CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2018	$ 45,277	$ 21,420,886	$ 25,268,187	$ 46,734,350
Balance, shares at Dec. 31, 2018	4,527,685
Exercise of stock options	$ 303	185,589		185,892
Exercise of stock options, shares	30,310
Other share retirements	$ (59)	(27,915)	(62,023)	(89,997)
Other share retirements, shares	(5,863)
Stock-based compensation		163,508		163,508
Dividend distribution			(641,379)	(641,379)
401(K) stock match	$ 296	409,229		409,525
401(K) stock match, shares	29,591
Issuance of deferred stock awards	$ 110	(55,044)		(54,934)
Issuance of deferred stock awards, shares	10,968
Shares issued under Employee Stock Purchase Plan	$ 114	127,217		127,331
Shares issued under Employee Stock Purchase Plan, shares	11,416
Net (loss) income			1,014,329	1,014,329
Balance at Jun. 30, 2019	$ 46,041	22,223,470	25,579,114	47,848,625
Balance, shares at Jun. 30, 2019	4,604,107
Balance at Mar. 31, 2019	$ 45,747	21,783,690	24,942,510	46,771,947
Balance, shares at Mar. 31, 2019	4,574,658
Exercise of stock options	$ 23	13,478		13,501
Exercise of stock options, shares	2,250
Stock-based compensation		73,450		73,450
Dividend distribution			(321,153)	(321,153)
401(K) stock match	$ 215	292,917		293,132
401(K) stock match, shares	21,480
Shares issued under Employee Stock Purchase Plan	$ 57	59,935		59,992
Shares issued under Employee Stock Purchase Plan, shares	5,719
Net (loss) income			957,757	957,757
Balance at Jun. 30, 2019	$ 46,041	22,223,470	25,579,114	47,848,625
Balance, shares at Jun. 30, 2019	4,604,107
Balance at Dec. 31, 2019	$ 46,445	22,733,933	26,635,732	49,416,110
Balance, shares at Dec. 31, 2019	4,644,522
Exercise of stock options	$ 242	200,548		200,790
Exercise of stock options, shares	24,250
Other share retirements	$ (99)	(44,587)	(79,512)	(124,198)
Other share retirements, shares	(9,920)
Stock-based compensation		67,664		67,664
Dividend distribution			(3,653)	(3,653)
401(K) stock match	$ 185	175,491		175,676
401(K) stock match, shares	18,497
Issuance of deferred stock awards	$ 256	(72,635)		(72,379)
Issuance of deferred stock awards, shares	25,563
Shares issued under Employee Stock Purchase Plan	$ 39	36,246		36,285
Shares issued under Employee Stock Purchase Plan, shares	3,902
Net (loss) income			(925,976)	(925,976)
Balance at Jun. 30, 2020	$ 47,068	23,096,660	25,626,591	48,770,319
Balance, shares at Jun. 30, 2020	4,706,814
Balance at Mar. 31, 2020	$ 46,941	23,035,735	26,811,441	49,894,117
Balance, shares at Mar. 31, 2020	4,694,138
Stock-based compensation		10,058		10,058
Dividend distribution			(3,653)	(3,653)
401(K) stock match	$ 13	14,696		14,709
401(K) stock match, shares	1,318
Issuance of deferred stock awards	$ 75	(75)
Issuance of deferred stock awards, shares	7,456
Shares issued under Employee Stock Purchase Plan	$ 39	36,246		36,285
Shares issued under Employee Stock Purchase Plan, shares	3,902
Net (loss) income			(1,181,197)	(1,181,197)
Balance at Jun. 30, 2020	$ 47,068	$ 23,096,660	$ 25,626,591	$ 48,770,319
Balance, shares at Jun. 30, 2020	4,706,814