Condensed Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (296,000)	$ (413,000)
Adjustments to reconcile net loss to net cash provided by / (used in) operating activities:
Depreciation and amortization	42,000	42,000
Amortization of debt issuance costs	55,000	70,000
Allowance for doubtful accounts	0	4,000
Provision for slow moving and obsolete inventory	42,000	41,000
Share-based payment expense	3,000	7,000
Director fee paid with restricted stock	5,000	3,000
Changes in:
Accounts receivable	59,000	(168,000)
Inventory	153,000	171,000
Prepaid expenses and other current assets	28,000	64,000
Accounts payable	196,000	(25,000)
Accrued expenses and other current liabilities	(6,000)	48,000
Wages payable	(137,000)	(7,000)
Net cash provided by / (used in) operating activities	144,000	(166,000)
Cash flows from investing activities:
Patent application costs	0	(13,000)
Net cash used in investing activities	0	(13,000)
Cash flows from financing activities:
Proceeds from debt financing	48,000	150,000
Payments on debt financing	(81,000)	(81,000)
Proceeds from lines of credit	1,902,000	2,235,000
Payments on lines of credit	(2,027,000)	(2,085,000)
Net cash (used in) / provided by financing activities	(158,000)	220,000
Net change in cash and cash equivalents	(14,000)	40,000
Cash and cash equivalents - beginning of period	113,000	36,000
Cash and cash equivalents - end of period	99,000	76,000
Supplemental disclosures of cash flow information
Consulting expense prepaid with restricted stock	0	42,000
Debt issuance cost paid with restricted stock	14,000	18,000
Director Fee paid with restricted stock	5,000	3,000
Patent application costs	0	13,000
Cash paid during period for interest	79,000	76,000
Cash paid during period for taxes	$ 2,000	$ 2,000