Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues
Licenses, royalties and fees	$ 744,000	$ 793,800
Product and other sales	1,914,700	1,743,600
Total revenues	2,658,700	2,537,400
Cost of revenues
Licenses, royalties and fees	223,800	169,100
Product and other sales	899,900	672,600
Total cost of revenues	1,123,700	841,700
Gross profit	1,535,000	1,695,700
Operating expenses
Research and development	173,500	165,600
Sales and marketing	356,400	329,900
General and administrative	526,100	393,900
Total operating expenses	1,056,000	889,400
Net income from operations	479,000	806,300
Other income (expenses)
Interest income	18,200	11,700
Interest expense and bank charges	(6,900)	(10,800)
Total other income (expenses)	11,300	900
Net income before income taxes	490,300	807,200
Income taxes	(18,100)	52,300
Net income	$ 508,400	$ 754,900
Net income per common share
Basic	$ 0.01	$ 0.01
Diluted	$ 0.01	$ 0.01
Weighted average common shares outstanding
Basic	64,052,777	59,443,207
Diluted	64,172,276	59,836,570