STATEMENTS OF CASH FLOW - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (681,000)	$ (1,028,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	81,000	81,000
Amortization of debt issuance costs	108,000	126,000
Provision for bad debts	(2,000)	(16,000)
Provision for slow moving and obsolete inventory	96,000	134,000
Share-based payment expense	6,000	10,000
Director fee paid with restricted stock	17,000	6,000
Changes in:
Accounts receivable	84,000	(88,000)
Inventory	113,000	320,000
Prepaid expenses and other current assets	23,000	93,000
Accounts payable	293,000	(15,000)
Accrued expenses and other current liabilities	94,000	138,000
Wages payable	(174,000)	19,000
Net cash (used in) / provided by operating activities	58,000	(220,000)
Cash flows from investing activities:
Patent application costs	0	(22,000)
Net cash used in investing activities	0	(22,000)
Cash flows from financing activities:
Proceeds debt financing	86,000	63,000
Payments on debt financing	(88,000)	0
Proceeds from private placement	0	200,000
Proceeds from lines of credit	3,835,000	4,216,000
Payments on lines of credit	(4,000,000)	(4,160,000)
Net cash used in financing activities	(167,000)	319,000
Net decrease in cash and cash equivalents	(109,000)	77,000
Cash and cash equivalents - beginning of period	113,000	36,000
Cash and cash equivalents - end of period	4,000	113,000
Supplemental disclosures of cash flow information:
Consulting expense paid with restricted stock	0	25,000
Debt issuance cost paid with restricted stock	14,000	19,000
Director Fee paid with restricted stock	17,000	6,000
Patent application costs	0	22,000
Cash paid during the year for interest	155,000	157,000
Cash paid for taxes	$ 0	$ 2,000