Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenues	$ 7,505,371	$ 7,818,697
Cost of sales	1,715,054	2,500,407
Gross profit	5,790,317	5,318,290
Operating expenses:
Selling, general and administrative	4,853,767	4,611,097
Income from operations	936,550	707,193
Loss on currency exchange	0	(9,675)
Interest income	56,448	70,447
Income before taxes	992,998	767,965
Income tax expense	177,000	253,000
Net income	$ 815,998	$ 514,965
Net income per share - basic	$ 0.18	$ 0.12
Net income per share - diluted	$ 0.18	$ 0.11
Weighted-average shares outstanding - basic	4,491,135	4,473,591
Weighted-average shares outstanding - diluted	4,500,027	4,490,795