Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Licenses, royalties and fees	$ 190,500	$ 174,900
Product and other sales	218,900	250,500
Total revenues	409,400	425,400
Cost of revenues
Licenses, royalties and fees	25,200	25,000
Product and other sales	90,300	92,200
Total cost of revenues	115,500	117,200
Gross profit	293,900	308,200
Operating expenses
Research and development	38,000	37,100
Sales and marketing	68,900	70,100
General and administrative	94,100	102,700
Total operating expenses	201,000	209,900
Net income from operations	92,900	98,300
Other income (expenses)
Interest income	1,100	400
Interest expense and bank charges	(2,700)	(2,900)
Total other income (expenses)	(1,600)	(2,500)
Net income before income taxes	91,300	95,800
Income taxes	5,900
Net income	$ 85,400	$ 95,800
Basic and diluted net income per common share	$ 0.00	$ 0.00
Weighted average common shares outstanding
Basic	58,616,716	58,616,716
Diluted	59,001,489	58,911,883