Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues	$ 732,000	$ 866,000	$ 1,785,800	$ 1,688,300
Cost of revenues	39,600	37,700	68,800	66,500
Gross profit	692,400	828,300	1,717,000	1,621,800
Operating expenses:
Selling and marketing	110,600	108,500	227,600	210,100
General and administrative	199,600	327,800	494,600	633,000
Research and development	383,000	358,000	757,500	786,500
Total operating expenses	693,200	794,300	1,479,700	1,629,600
Income (loss) from operations	(800)	34,000	237,300	(7,800)
Other income (expense)	100	130,500	13,900	129,700
Income (loss) before provision for income taxes	(700)	164,500	251,200	121,900
Provision for income taxes		(100)		900
Net income (loss)	$ (700)	$ 164,600	$ 251,200	$ 121,000
Net income (loss) per share, basic	$ (0.00)	$ 0.02	$ 0.03	$ 0.01
Net income (loss) per share, diluted	$ (0.00)	$ 0.02	$ 0.02	$ 0.01
Weighted average number of common shares outstanding
Basic	9,810,091	9,804,400	9,807,261	9,804,400
Diluted	10,276,841	10,368,956	10,274,011	10,368,956