Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 958,000	$ 1,069,000	$ 1,880,000	$ 2,110,000
Cost of goods sold	652,000	632,000	1,269,000	1,301,000
Gross profit	306,000	437,000	611,000	809,000
Operating expenses:
Research and development	20,000	19,000	39,000	44,000
Selling and marketing	107,000	148,000	219,000	310,000
General and administrative	334,000	344,000	682,000	736,000
Operating Expenses, Total	461,000	511,000	940,000	1,090,000
Operating loss	(155,000)	(74,000)	(329,000)	(281,000)
Other income / (expense):
Interest expense	(67,000)	(76,000)	(134,000)	(146,000)
Other income, net	168,000	4,000	169,000	15,000
Interest income	0	1,000	0	1,000
Other income / (expense), Total	101,000	(71,000)	35,000	(130,000)
Net loss before tax	(54,000)	(145,000)	(294,000)	(411,000)
Income tax expense	(2,000)	(2,000)	(2,000)	(2,000)
Net loss	$ (56,000)	$ (147,000)	$ (296,000)	$ (413,000)
Basic and diluted loss per common share	$ (0.00)	$ (0.00)	$ (0.01)	$ (0.01)
Weighted average number of shares outstanding - basic & diluted	32,521,675	29,936,111	32,445,244	29,879,754