STATEMENTS OF CASH FLOW - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net loss	$ (545,000)	$ (345,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	80,000	91,000
Amortization of debt issuance costs	126,000	122,000
Provision for bad debts	3,000	(1,000)
Provision for slow moving and obsolete inventory	51,000	17,000
Share-based payment expense	43,000	61,000
Changes in:
Accounts receivable	205,000	116,000
Inventory	58,000	147,000
Prepaid expenses and other current assets	96,000	39,000
Accounts payable	70,000	(39,000)
Accrued expenses and other current liabilities	34,000	26,000
Wages payable	(40,000)	7,000
Net cash provided by operating activities	181,000	241,000
Cash flows from investing activities:
Purchase of property, plant and equipment	(44,000)	0
Patent application costs	(20,000)	(30,000)
Net cash used in investing activities	(64,000)	(30,000)
Cash flows from financing activities:
Proceeds (payments on) debt financing, net	(44,000)	(75,000)
Proceeds from lines of credit	5,832,000	6,018,000
Payments on lines of credit	(6,025,000)	(6,156,000)
Net cash used in financing activities	(237,000)	(213,000)
Net decrease in cash and cash equivalents	(120,000)	(2,000)
Cash and cash equivalents - beginning of period	156,000	158,000
Cash and cash equivalents - end of period	36,000	156,000
Supplemental disclosures of cash flow information:
Consulting expense paid with restricted stock	71,000	98,000
Common shares issued in connection with debt financings	0	96,000
Related Party note payable paid with restricted stock	0	154,000
Cash paid during the year for interest	146,000	162,000
Cash paid for taxes	$ 0	$ 4,000