Condensed Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Condensed Balance Sheets
Allowance for doubtful accounts receivable, current	$ 2,000	$ 3,000
Inventory valuation reserves	$ 260,000	$ 260,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	48,098,476	47,598,476
Common stock, shares outstanding	48,098,476	47,598,476