STATEMENTS OF CASH FLOW - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net loss	$ (1,028,000)	$ (545,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	81,000	80,000
Amortization of debt issuance costs	126,000	126,000
Provision for bad debts	(16,000)	3,000
Provision for slow moving and obsolete inventory	134,000	51,000
Share-based payment expense	10,000	43,000
Director fee paid with restricted stock	6,000	0
Changes in:
Accounts receivable	(88,000)	205,000
Inventory	320,000	58,000
Prepaid expenses and other current assets	93,000	96,000
Accounts payable	(15,000)	70,000
Accrued expenses and other current liabilities	138,000	34,000
Wages payable	19,000	(40,000)
Net cash (used in) / provided by operating activities	(220,000)	181,000
Cash flows from investing activities:
Purchase of property, plant and equipment	0	(44,000)
Patent application costs	(22,000)	(20,000)
Net cash used in investing activities	(22,000)	(64,000)
Cash flows from financing activities:
Proceeds (payments on) debt financing, net	63,000	(44,000)
Proceeds from private placement	200,000	0
Proceeds from lines of credit	4,216,000	5,832,000
Payments on lines of credit	(4,160,000)	(6,025,000)
Net cash used in financing activities	319,000	(237,000)
Net decrease in cash and cash equivalents	77,000	(120,000)
Cash and cash equivalents - beginning of period	36,000	156,000
Cash and cash equivalents - end of period	113,000	36,000
Supplemental disclosures of cash flow information:
Consulting expense paid with restricted stock	25,000	71,000
Common shares issued in connection with debt financings	19,000	0
Related Party note payable paid with restricted stock	6,000	0
Patent application costs	22,000	20,000
Cash paid during the year for interest	157,000	146,000
Cash paid for taxes	$ 2,000	$ 0