Statements of Comprehensive Income (unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Licenses, royalties and fees	$ 144,900	$ 107,100	$ 330,400	$ 271,700
Product and other sales	369,000	520,200	794,900	875,900
Total revenues	513,900	627,300	1,125,300	1,147,600
Cost of revenues
Licenses, royalties and fees	49,500	58,600	96,600	108,300
Product and other sales	184,300	247,200	357,500	448,800
Total cost of revenues	233,800	305,800	454,100	557,100
Gross profit	280,100	321,500	671,200	590,500
Operating expenses
Research and development	45,800	41,900	90,300	83,000
Sales and marketing	74,200	86,000	157,400	170,000
General and administrative	117,700	120,000	263,200	259,700
Total operating expenses	237,700	247,900	510,900	512,700
Net income from operations	42,400	73,600	160,300	77,800
Other income (expenses)
Interest income	5,300	4,300	10,100	8,100
Interest expense and bank charges	(600)	(2,100)	(1,200)	(4,600)
Total other income (expenses)	4,700	2,200	8,900	3,500
Net income before income taxes	47,100	75,800	169,200	81,300
Income taxes	4,600	5,000	11,900	(42,100)
Net income	$ 42,500	$ 70,800	$ 157,300	$ 123,400
Basic and diluted net income per common share	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Weighted average common shares outstanding
Basic	67,400,812	61,044,698	67,377,251	61,044,698
Diluted	67,400,812	61,605,985	67,377,251	61,577,129