Condensed Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (413,000)	$ (203,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	42,000	43,000
Amortization of debt issuance costs	70,000	63,000
Allowance for doubtful accounts	4,000	0
Provision for slow moving and obsolete inventory	41,000	19,000
Share-based payment expense	7,000	23,000
Changes in:
Accounts receivable	(168,000)	74,000
Inventory	171,000	113,000
Prepaid expenses and other current assets	64,000	54,000
Accounts payable	(25,000)	(26,000)
Accrued expenses and other current liabilities	48,000	(13,000)
Wages payable	(7,000)	(31,000)
Net cash (used in) / provided by operating activities	(166,000)	116,000
Cash flows from investing activities:
Patent application costs	(13,000)	(13,000)
Purchase of property, plant and equipment	0	(38,000)
Net cash used in investing activities	(13,000)	(51,000)
Cash flows from financing activities:
Proceeds from / (payments on) debt financing	69,000	(38,000)
Proceeds from lines of credit	2,235,000	2,835,000
Payments on lines of credit	(2,085,000)	(2,880,000)
Net cash provided by / (used in) financing activities	219,000	(83,000)
Net change in cash and cash equivalents	40,000	(18,000)
Cash and cash equivalents - beginning of period	36,000	156,000
Cash and cash equivalents - end of period	76,000	138,000
Supplemental disclosures of cash flow information
Consulting expense prepaid with restricted stock	42,000	50,000
Debt issuance cost paid with restricted stock	18,000	0
Director Fee paid with restricted stock	3,000	0
Cash paid during period for interest	76,000	71,000
Cash paid during period for taxes	$ 2,000	$ 1,000