CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Sales, net	$ 6,918,131	$ 6,758,367	$ 19,008,680	$ 17,547,990
Cost of sales	2,696,934	2,694,345	7,373,909	6,704,974
Gross profit	4,221,197	4,064,022	11,634,771	10,843,016
OPERATING EXPENSES:
Sales and marketing	1,876,455	1,860,537	5,238,493	5,542,123
General and administrative	1,040,908	929,158	3,064,332	2,865,697
Total operating expenses	2,917,363	2,789,695	8,302,825	8,407,820
Income from operations	1,303,834	1,274,327	3,331,946	2,435,196
OTHER INCOME (EXPENSE)
Interest income	2,615	25,268	17,845	35,554
Interest expense	(103,283)	(110,547)	(314,158)	(332,049)
Other income (expense), net	37,097	(18,060)	137,899	103,040
Income before income taxes	1,240,263	1,170,988	3,173,532	2,241,741
Income tax provision	(343,464)	(318,788)	(869,230)	(603,154)
Net income	896,799	852,200	2,304,302	1,638,587
Accrued preferred stock dividends	(256,452)	(256,452)	(769,356)	(769,357)
Income applicable to common shareholders	$ 640,347	$ 595,748	$ 1,534,946	$ 869,230
Earnings per common share after preferred dividends, basic and diluted	$ 0.13	$ 0.12	$ 0.31	$ 0.18
Weighted average number of common shares outstanding	4,964,529	4,964,529	4,964,529	4,964,529