Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 6,966,683	$ 4,401,441
Cost of sales	1,895,733	1,073,523
Gross profit	5,070,950	3,327,918
Operating expenses:
Selling, general and administrative	3,562,003	3,670,912
Income (loss) from operations	1,508,947	(342,994)
Investment loss	(57,000)	0
Other income	473,400	473,400
Interest income	83,304	79,487
Income before taxes	2,008,651	209,893
Income tax expense (benefit)	298,000	(97,000)
Net income	$ 1,710,651	$ 306,893
Net income per share - basic (in dollars per share)	$ 0.38	$ 0.07
Net income per share - diluted (in dollars per share)	$ 0.37	$ 0.07
Weighted-average shares outstanding - basic (in shares)	4,509,198	4,486,788
Weighted-average shares outstanding - diluted (in shares)	4,563,621	4,497,599