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Balance Sheets - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Current assets    
Cash $ 400,800 $ 360,400
Accounts receivable less $5,000 allowance for doubtful accounts 579,000 292,100
Inventory 133,500 110,600
Prepaid and other 43,600 35,300
Total current assets 1,156,900 798,400
Fixed assets    
Leasehold improvements 19,700 19,700
Furniture, fixtures and equipment 185,400 184,900
Fixed assets, gross 205,100 204,600
Less: accumulated depreciation and amortization 197,600 190,500
Total fixed assets 7,500 14,100
Other assets    
Long-term receivable 1,352,200
Total assets 2,516,600 812,500
Current liabilities    
Convertible debentures 128,300 128,300
Accounts payable 16,500 4,900
Accrued expenses 163,000 364,700
Income taxes 38,600
Deferred revenue 99,400
Total current liabilities 346,400 597,300
Other liabilities    
Accrued expenses, non-current 94,700
Deferred income taxes 108,800
Total other liabilities 203,500
Stockholders' equity    
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 - 58,616,716 586,200 586,200
Paid-in capital 12,440,000 12,440,000
Accumulated deficit (11,059,500) (12,811,000)
Total stockholders' deficiency 1,966,700 215,200
Total liabilities and stockholders' equity $ 2,516,600 $ 812,500