Balance Sheets - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash	$ 360,400	$ 199,100
Accounts receivable less $5,000 allowance for doubtful accounts	292,100	243,400
Inventory	110,600	70,900
Prepaid and other	35,300	29,600
Total current assets	798,400	543,000
Fixed assets
Leasehold improvements	19,700	19,700
Furniture, fixtures and equipment	184,900	178,300
Fixed assets, gross	204,600	198,000
Less: accumulated depreciation and amortization	190,500	183,000
Total fixed assets	14,100	15,000
Total assets	812,500	558,000
Current liabilities
Demand loans		10,000
Convertible debentures	128,300	128,300
Accounts payable	4,900	33,100
Accrued expenses	364,700	459,900
Deferred revenue	99,400	106,300
Total current liabilities	597,300	737,600
Commitments and contingencies
Stockholders' equity (deficiency)
Series A preferred stock, $1.00 par value, Authorized - 300,000 shares, Issued and outstanding - none
Common stock, $0.01 par value Authorized - 75,000,000 shares Issued and outstanding 2017 - 58,616,716; 2016 - 58,599,016 shares	586,200	586,000
Paid-in capital	12,440,000	12,426,600
Accumulated deficit	(12,811,000)	(13,192,200)
Total stockholders' deficiency	215,200	(179,600)
Total liabilities and stockholders' equity (deficiency)	$ 812,500	$ 558,000