Balance Sheets - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash	$ 1,362,800	$ 688,000
Accounts receivable less allowance for doubtful accounts - 2020-$12,000; 2019-$5,000	1,280,800	1,352,300
Inventory	324,800	127,900
Prepaid and other	97,800	135,000
Total current assets	3,066,200	2,303,200
Fixed assets
Leasehold improvements	27,800	24,200
Furniture, fixtures and equipment	163,700	252,500
Fixed assets, gross	191,500	276,700
Less: accumulated depreciation and amortization	104,300	206,600
Total fixed assets	87,200	70,100
Other assets
Long-term receivables	559,500	957,000
Operating lease right of use - building	160,300	202,000
Other assets	719,800	1,159,000
Total assets	3,873,200	3,532,300
Current liabilities
Convertible debentures		97,900
Accounts payable	5,700	44,300
Accrued expenses	178,600	231,600
Income taxes	36,300	52,400
Operating lease liability - current	44,500	41,700
Total current liabilities	265,100	467,900
Other liabilities
Accrued expenses, non-current	39,200	67,000
Deferred income taxes		47,400
Operating lease liability - non-current	115,800	160,300
Total other liabilities	155,000	274,700
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 - 2020 - 67,353,690 shares; 2019 - 61,044,698 shares	673,500	610,400
Paid-in capital	12,575,800	12,483,900
Accumulated deficit	(9,796,200)	(10,304,600)
Total stockholders' equity	3,453,100	2,789,700
Total liabilities and stockholders' equity	$ 3,873,200	$ 3,532,300