Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
ASSETS
Cash and cash equivalents	$ 1,250,261	$ 2,051,208
Restricted cash	55,000	55,000
Accounts receivable	134,115	92,320
Inventory	211,930	240,005
Prepaid expenses and other current assets	177,545	196,378
Total current assets	1,828,851	2,634,911
Property and equipment, net	54,407	53,165
Operating lease right of use assets	337,537	359,284
Total assets	2,220,795	3,047,360
LIABILITIES AND STOCKHOLDERS' EQUITY
Common stock; $0.0001 par value, 100,000,000 shares authorized, 41,799,016 shares issued and outstanding	4,180	4,180
Additional paid-in capital	28,954,383	28,951,963
Accumulated deficit	(27,620,560)	(26,764,805)
Total stockholders' equity	1,338,003	2,191,338
Total liabilities and stockholders' equity	2,220,795	3,047,360
Current liabilities
Accounts payable	425,594	397,703
Accrued expenses	141,281	123,275
Current portion of operating lease liabilities	82,326	79,453
Total current liabilities	649,201	600,431
Non-current portion of operating lease liabilities	233,591	255,592
Total liabilities	882,792	856,022
Commitments and contingencies (Note 6)