Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Activities
Net income (loss)	$ 114,400	$ (3,600)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation and amortization	3,500	3,700
Accretion of interest - convertible debentures	13,200	500
Net income adjusted for non-cash operating activities	131,100	600
(Increase) decrease in assets
Accounts receivable	(50,600)	85,100
Inventory	(15,500)	(26,300)
Prepaid and other	(400)	(12,500)
Increase (decrease) in liabilities
Accounts payable and accrued expenses	(69,000)	39,900
Deferred revenue	(10,300)	43,400
Total increase in operating capital	(145,800)	129,600
Net cash provided by (used in) operating activities	(14,700)	130,200
Investing Activities
Additions to fixed assets	(4,900)
Net cash used in investing activities	(4,900)
Financing Activities
Repayment of demand loans		(9,000)
Net cash used in financing activities		(9,000)
Increase (decrease) in cash	(19,600)	121,200
Cash at beginning of year	199,100	11,400
Cash at end of period	$ 179,500	$ 132,600