Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 1,046,314	$ 1,276,654
Inventory	8,962
Prepaid expense and other current assets	16,002	26,580
Total current assets	1,071,278	1,303,234
Patents, net	143,546	146,456
Property and equipment, net	11,016	14,010
Total assets	1,225,840	1,463,700
Liabilities and Stockholders' Equity
Accounts payable and accrued expenses	141,674	115,313
Advances from investors	56,225	104,952
Convertible notes payable – related party	475,856	513,356
Total current liabilities	673,755	733,621
Total liabilities	673,755	733,621
Stockholders' equity
Preferred stock, $0.01 par value: Authorized shares - 10,000,000, Issued and outstanding shares – 0 at March 31, 2019 and December 31, 2018
Common stock, $0.01 par value: Authorized shares - 100,000,000, Issued and outstanding shares –39,568,524 and 39,117,524 at March 31, 2019 and December 31, 2018, respectively	395,685	391,175
Additional paid-in capital	3,736,123	3,527,238
Accumulated deficit	(3,579,723)	(3,188,334)
Total stockholders’ equity	552,085	730,079
Total liabilities and stockholders’ equity	$ 1,225,840	$ 1,463,700