Condensed Consolidated Statements of Net Income (Loss) and Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net sales	$ 8,016,560	$ 8,257,013	$ 18,299,225	$ 17,746,517
Costs and expenses:
Cost of goods sold	2,202,488	2,268,992	4,857,331	4,702,723
Distributor royalties and commissions	2,590,078	2,665,093	5,918,533	5,782,665
Selling, general and administrative	3,501,104	3,688,944	7,278,786	7,428,472
Total costs and expenses	8,293,670	8,623,029	18,054,650	17,913,860
Income (loss) from operations	(277,110)	(366,016)	244,575	(167,343)
Other income (expense):
Interest income	39,048	46,218	78,710	95,480
Interest expense	(7,933)	(10,075)	(14,038)	(15,487)
Other income (expense)	100,938	4,768	30,032	(660)
Gain on sale of fixed assets				434,549
Income (loss) before income taxes	(145,057)	(325,105)	339,279	346,539
Provision (benefit) for income taxes	54,000	63,000	(124,000)	111,000
Net income (loss)	(199,057)	(388,105)	463,279	235,539
Other comprehensive income (loss):
Foreign currency translation adjustment	(13,796)	(10,458)	(53,407)	11,753
Comprehensive income (loss)	$ (212,853)	$ (398,563)	$ 409,872	$ 247,292
Earnings (loss) per common share - Basic & Diluted (in dollars per share)	$ (0.11)	$ (0.22)	$ 0.27	$ 0.13
Weighted average shares (in shares)	1,746,000	1,746,000	1,746,000	1,746,000
Product [Member]
Net sales	$ 7,371,162	$ 7,603,041	$ 16,919,979	$ 16,414,038
Freight Income [Member]
Net sales	446,707	479,881	1,004,802	999,822
Product and Service, Other [Member]
Net sales	$ 198,691	$ 174,091	$ 374,444	$ 332,657