NET INCOME PER SHARE COMPUTATIONS (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
NET INCOME PER SHARE COMPUTATIONS
Net income (numerator) amounts used for basic and diluted per share computations:	$ 1,849,012	$ 1,150,485	$ 923,036	$ 2,164,832
Weighted average shares (denominator) of common stock outstanding:
Basic	4,708,966	4,604,562	4,688,282	4,583,591
Plus dilutive effect of stock options		4,425	3,096	12,723
Diluted	4,708,966	4,608,987	4,691,378	4,596,314
Net income per common share:
Basic	$ 0.39	$ 0.25	$ 0.20	$ 0.47
Diluted	$ 0.39	$ 0.25	$ 0.20	$ 0.47