Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 723,441	$ 1,276,654
Inventory	9,905
Prepaid expense and other current assets	64,632	26,580
Total current assets	797,978	1,303,234
Patents, net	140,635	146,456
Property and equipment, net	6,384	14,010
Total assets	944,997	1,463,700
Liabilities and Stockholders' Equity
Accounts payable and accrued expenses	173,262	115,313
Advances from investors	56,225	104,952
Convertible notes payable – related party	475,856	513,356
Total current liabilities	705,343	733,621
Total liabilities	705,343	733,621
Stockholders' equity
Preferred stock, $0.01 par value: Authorized shares - 10,000,000, Issued and outstanding shares – 0 at June 30, 2019 and December 31, 2018
Common stock, $0.01 par value: Authorized shares - 100,000,000, Issued and outstanding shares –39,664,199 and 39,117,524 at June 30, 2019 and December 31, 2018, respectively	396,642	391,175
Additional paid-in capital	3,876,311	3,527,238
Accumulated deficit	(4,033,299)	(3,188,334)
Total stockholders’ equity	239,654	730,079
Total liabilities and stockholders’ equity	$ 944,997	$ 1,463,700