Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Licenses, royalties and fees	$ 192,000	$ 1,655,600	$ 382,500	$ 1,830,500
Product and other sales	324,100	218,100	543,000	468,600
Total revenues	516,100	1,873,700	925,500	2,299,100
Cost of revenues
Licenses, royalties and fees	31,600	24,200	56,800	49,200
Product and other sales	123,400	93,400	213,700	185,600
Total cost of revenues	155,000	117,600	270,500	234,800
Gross profit	361,100	1,756,100	655,000	2,064,300
Operating expenses
Research and development	39,400	36,100	77,400	73,200
Sales and marketing	74,300	168,500	143,200	238,600
General and administrative	86,900	101,500	181,000	204,200
Total operating expenses	200,600	306,100	401,600	516,000
Net income from operations	160,500	1,450,000	253,400	1,548,300
Other income (expenses)
Interest income	1,500	300	2,600	700
Interest expense, bank charges and accretion of interest	(2,700)	(2,800)	(5,400)	(5,700)
Total other income (expenses)	(1,200)	(2,500)	(2,800)	(5,000)
Net income before income taxes	159,300	1,447,500	250,600	1,543,300
Income taxes	10,400		16,300
Net income	$ 148,900	$ 1,447,500	$ 234,300	$ 1,543,300
Basic and diluted net income per common share	$ 0.00	$ 0.02	$ 0.00	$ 0.03
Weighted average common shares outstanding
Basic	58,616,716	58,616,716	58,616,716	58,616,716
Diluted	58,973,280	58,989,480	58,988,005	58,955,344