Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 4,401,441	$ 7,908,461
Cost of sales	1,073,523	2,457,077
Gross profit	3,327,918	5,451,384
Operating expenses:
Selling, general and administrative expenses	3,670,912	4,528,567
Income (loss) from operations	(342,994)	922,817
Other income	473,400	0
Interest income	79,487	56,448
Income before taxes	209,893	979,265
Income tax expense (benefit)	(97,000)	174,000
Net income	$ 306,893	$ 805,265
Basic (in dollars per share)	$ 0.07	$ 0.18
Diluted net income per share (in dollars per share)	$ 0.07	$ 0.18
Weighted-average shares outstanding - basic (in shares)	4,486,788	4,491,135
Weighted-average shares outstanding - diluted (in shares)	4,497,599	4,500,027