Balance Sheets (unaudited) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash	$ 3,600,100	$ 2,269,200
Accounts receivable less $12,000 allowance for credit losses	981,500	1,120,700
Inventory	370,300	448,000
Interest receivable	205,100	160,000
Short-term investments	6,910,900	7,985,600
Prepaid and other	100,600	121,800
Total current assets	12,168,500	12,105,300
Fixed assets
Leasehold improvements	81,500	81,500
Furniture, fixtures and equipment	177,800	169,800
Fixed assets, gross	259,300	251,300
Less: accumulated depreciation and amortization	229,000	214,800
Total fixed assets	30,300	36,500
Other assets
Long-term receivables	1,701,300	1,838,500
Operating lease right of use – building	4,400	17,600
Total other assets	1,705,700	1,856,100
Total assets	13,904,500	13,997,900
Current liabilities
Accounts payable	47,700	27,500
Accrued expenses	120,000	94,600
Stock compensation payable	2,259,100	1,347,100
Operating lease liability – current	4,400	17,600
Total current liabilities	2,431,200	1,486,800
Other liabilities
Accrued expenses, non-current	119,000	128,600
Total other liabilities	119,000	128,600
Stockholders' equity
Common stock, $0.01 par value Authorized – 75,000,000 shares Issued and outstanding – 10,501,178 shares	105,000	105,000
Paid-in capital	21,647,100	21,647,100
Accumulated deficit	(10,397,800)	(9,369,600)
Total stockholders' equity	11,354,300	12,382,500
Total liabilities and stockholders' equity	$ 13,904,500	$ 13,997,900