Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Cash	$ 176,000	$ 367,000
Accounts receivable, net	380,000	289,000
Inventories, net	3,393,000	3,826,000
Prepaid expenses and other current assets	238,000	604,000
Total current assets	4,187,000	5,086,000
Property, plant and equipment, net	120,000	157,000
Right-of-use asset, net	323,000	424,000
Other assets	101,000	101,000
Total non-current assets	544,000	682,000
TOTAL ASSETS	4,731,000	5,768,000
Accounts payable and accrued expenses	2,520,000	2,846,000
Derivative liability	0	79,000
Lease liabilities	298,000	355,000
Deferred revenue	192,000	58,000
Total current liabilities	5,641,000	4,754,000
Lease liabilities, net of current portion	30,000	73,000
Total non-current liabilities	180,000	1,121,000
Total liabilities	5,821,000	5,875,000
Commitments and Contingencies
Stockholders' (deficit) equity:
Common stock ($0.001 par value); 500,000,000 shares authorized; 229,349,388 and 228,535,886 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	229,000	229,000
Additional paid-in capital	8,266,000	8,204,000
Accumulated deficit	(9,585,000)	(8,540,000)
Total stockholders' equity	(1,090,000)	(107,000)
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 4,731,000	$ 5,768,000
Series A Preferred Stock [Member]
Stockholders' (deficit) equity:
Preferred Stock, Shares Issued (in shares)	126,680	128,181
Series A, 300,000 shares designated; 126,680 and 128,181 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	$ 0	$ 0
Series B Preferred Stock [Member]
Stockholders' (deficit) equity:
Preferred Stock, Shares Issued (in shares)	0	0
Series A, 300,000 shares designated; 126,680 and 128,181 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	$ 0	$ 0
Nonrelated Party [Member]
Note payable	559,000	716,000
Notes payable, net of current portion	150,000	150,000
Related Party [Member]
Note payable	2,072,000	700,000
Notes payable, net of current portion	$ 0	$ 898,000